US 20120021495A1 (19) United States (12) Patent Application Publication (10) Pub. No.: US 2012/0021495 A1 Vanzin (43) Pub. Date: Jan. 26, 2012

(54) GENERATION OF MATERIALS WITH abandoned, Continuation-in-part of application No. ENHANCED HYDROGEN CONTENT FROM 11/099,880, ?led on Apr. 5, 2005, now abandoned. ANAEROBIC MICROBIAL CONSORTIA INCLUDING DESULFUROMONAS OR Publication Classi?cation CLOSTRIDIA (51) Int. Cl. C12N 1/20 (2006.01) (75) Inventor: Gary Vanzin, Arvada, CO (US) (52) US. Cl...... 435/2521 (73) Assignee: LUCA Technologies, LLC, (57) ABSTRACT Golden, CO (US) An isolated microbial consortia is described. The consortia Appl. No.: 13/189,030 may include a ?rst-bite microbial consortium that converts a (21) starting hydrocarbon that is a complex hydrocarbon into two Filed: Jul. 22, 2011 or more ?rst-bite metabolic products. The consortia may also (22) include a downstream microbial consortium that converts a starting hydrocarbon metabolic product into a downstream Related US. Application Data metabolic product. The downstream metabolic product has a (63) Continuation of application No. 11/ 971,075, ?led on greater mol. % hydrogen than the starting hydrocarbon. The Jan. 8, 2008, which is a continuation-in-part of appli ?rst-bite microbial consortium or the downstream microbial cation No. 11/099,881, ?led on Apr. 5, 2005, now consortium includes one or more species of Desulfuromonas.

Patent Application Publication Jan. 26, 2012 Sheet 2 0f 4 US 2012/0021495 A1

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Fig, 2 Patent Application Publication Jan. 26, 2012 Sheet 3 0f 4 US 2012/0021495 A1

BIVARlATE FIT OF % CONSORTIUM COMPRXSED OF DESULFUROMONAS BY METHANOGENESIS RATE ( MICROMOLES CH4lg COAL/DAY) 60

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O 1 1.5| '2 2'5 :3 3:5 21 4.5 METHANOGENESIS RATE (MICROMOLES CH4 PRODUCED/g COAL/ DAY) FIG-.3 Patent Application Publication Jan. 26, 2012 Sheet 4 0f 4 US 2012/0021495 A1

Bivariate Fit of % consortium comprised of Fusibacter By Methanogenesis Rate (micromoles CH4/g coal/day)

25

u5umwcaEooEzEowcooQ0 kwhom?msmm w

Methanogenesis rate (micromoles CH4 / 9 coal / day)

Fig. 4 US 2012/0021495 A1 Jan. 26, 2012

GENERATION OF MATERIALS WITH Thus, neW recovery techniques are needed that can extract ENHANCED HYDROGEN CONTENT FROM resources from these formations With signi?cantly loWer ANAEROBIC MICROBIAL CONSORTIA expenditures of energy. INCLUDING DESULFUROMONAS OR [0005] Conventional recovery techniques also extract the CLOSTRIDIA carbonaceous materials in their native state (e.g., crude oil, coal), and the combustion products of these materials may CROSS REFERENCES TO RELATED include a number of pollutants, including sulfur compounds APPLICATIONS (SOX), nitrogen compounds (NOX), and carbon dioxide (CO2). Concern about the environmental impact of burning [0001] This application is a continuation of application Ser. these native carbonaceous materials has led to national and No. 11/971,075, ?led Jan. 8, 2008, and entitled “Generation international initiatives to develop less polluting energy of Materials With Enhanced Hydrogen Content From sources. One approach is to generate more energy With natu Anaerobic Microbial Consortia,” Which is a continuation-in ral gas (i.e., methane), Which has loW levels of sulfur and part of prior application Ser. No. 11/099,881, ?led Apr. 5, nitrogen, and generates less carbon dioxide per unit energy 2005, and entitled “Generation Of Materials With Enhanced than larger hydrocarbons. Hydrogen Content From Anaerobic Microbial Consortia.” [0006] Another approach that is receiving considerable This application is also a continuation-in-part of prior appli government and private sector support is the development of cation Ser. No. 11/099,880, ?led Apr. 5, 2005, and entitled hydrogen engines and fuel cells for vehicle propulsion and “Generation Of Materials With Enhanced Hydrogen Content electricity generation. The combustion of molecular hydro From Anaerobic Microbial Consortia Including Thermo gen (H2) into Water presents a more benign environmental Zoga.” The entire contents of both applications are herein alternative to burning gasoline, oil or coal. Hydrogen, hoW incorporated by reference for all purposes. ever, is more accurately characteriZed as an energy carrier than a fuel source. Very little molecular hydrogen exists in FIELD OF THE INVENTION nature, and other energy sources are needed to make the hydrogen. The role of hydrogen is to carry the energy from [0002] The present invention relates to biogenic enhance another energy source to the site Where it can be released by ment of the mole percentage of hydrogen in hydrocarbon chemical reaction (e.g., combustion) to do useful Work. A molecules and enhancements in biogenic hydrogen and meth poWer and transportation infrastructure based on hydrogen ane production in geologic formations. Speci?cally, the Will require adequate supplies of energy and/or feedstock invention relates to isolated microbial consortia that can materials to make the hydrogen. One Well knoWn method of include archaea, bacteria, and/or other microorganisms, making hydrogen is the steam reforming of methane, Where Which are capable of transforming carbonaceous materials in methane (CH4) and steam (H2O) are converted into carbon the formations into molecular hydrogen, and/or hydrocar monoxide (CO) and hydrogen (H2). Thus, one Way to realiZe bons having a larger mole percentage of hydrogen than the a hydrogen economy Will be economically converting large starting materials. quantities of methane to hydrogen and recover it. [0007] The above discussion and citation of documents herein is not intended as an admission that any is pertinent BACKGROUND OF THE INVENTION prior art. All statements as to the date or representation as to [0003] Increasing World energy demand is creating unprec the contents of documents is based on the information avail edented challenges for recovering energy resources, and miti able to the applicant and does not constitute any admission as gating the environmental impact of using those resources. to the correctness of the dates or contents of the documents. Some have argued that the WorldWide production rates for oil BRIEF SUMMARY OF THE INVENTION and domestic natural gas Will peak Within a decade or less. Once this peak is reached, primary recovery of oil and domes [0008] The present invention relates to microorganisms tic natural gas Will start to decline, as the most easily recov that participate in the degradation of large or complex hydro erable energy stocks start to dry up. Historically, old oil ?elds carbons found in naturally occurring sources, such as those and coal mines are abandoned once the easily recoverable present in underground formations. The microorganisms are materials are extracted. These abandoned reservoirs, hoW useful for the recovery of energy contained Within large or ever, still contain signi?cant amounts of carbonaceous mate complex hydrocarbons, many of Which are associated With rial. The PoWder River Basin in northeastern Wyoming, for other materials that hinder extraction of the hydrocarbons example, is still estimated to contain approximately 1,300 from the formations, by converting the hydrocarbons to billion short tons of coal. Just 1% of the Basin’s remaining smaller molecules that can be more readily recovered or coal converted to natural gas could supply the current annual extracted. natural gas needs of the United States (i.e., about 23 trillion [0009] The invention is based in part on energy recovery by cubic feet) for the next four years. Several more abandoned conversion of large or complex hydrocarbons to smaller coal and oil reservoirs of this magnitude are present in the hydrocarbons, optionally With release thereof from materials United States. that hinder extraction of large or complex hydrocarbons. The [0004] As WorldWide energy prices continue to rise, it may route is based on biogenic conversion of carbonaceous mate become economically viable to extract additional oil and coal rials in underground formations, Which conversion has from these formations With conventional drilling and mining received relatively little commercial attention. Large poten techniques. HoWever, a point Will be reached Where more tial sources of energy, locked up in carbonaceous materials energy must be used to recover the resources than is gained by such as (but not limited to) coal, residual oil, etc., may be the recovery. At that point, traditional recovery mechanisms more readily recovered by conversion of the hydrocarbons in Will become uneconomical, regardless of the price of energy. the carbonaceous materials, as Well as the carbonaceous US 2012/0021495 A1 Jan. 26, 2012

material itself, into methane and other light hydrocarbons. In [0012] The isolated microorganisms are in the form of a biogenic conversion, consortia of microorganisms treat the consortium, comprising a plurality of tWo or more different carbonaceous materials as a source of raW materials for con species of microorganisms. In some embodiments, a consor version into smaller, lighter metabolites including alcohols, tium of the invention contains tWo or more different micro organic acids, aromatic compounds, molecular hydrogen, organisms that are metabolically related, such as Where the and/or methane as non-limiting examples. Conversion by microorganisms have a symbiotic relationship With each microorganisms includes their reformation or utiliZation of other. The invention includes consortia Wherein tWo or more starting materials to form products by metabolism, including of the species of microorganisms present therein are related catabolism and/ or anabolism by microorganisms of a consor by syntrophy such that one microorganism is a syntroph of tium. one or more others. Such consortia are advantageous Where [0010] Given that in in situ in sub-surface formations, the individual syntroph microorganisms cannot be separately concentrations of free oxygen (i.e., O2) often falls beloW the cultured or propagated (in the absence of the related syntroph level that can sustain aerobic metabolism in microorganisms (5)) (or strict aerobic microorganisms), it is possible that consortia [0013] Embodiments of the invention include isolated of anaerobic microorganisms (including obligate and/or fac microbial consortia for biogenically increasing the hydrogen ultative anaerobic microorganisms or microaerophiles) pre content of a product derived from a starting hydrocarbon that dominate. Unfortunately, most anaerobic microorganisms includes complex hydrocarbons that make up a carbonaceous cannot survive in the oxygen rich atmosphere above ground, material like coal or oil. The consortia includes a ?rst-bite and are dif?cult to study in conventional laboratories. For this microbial consortium that converts the starting hydrocarbon reason and others, anaerobic consortia of microorganisms into tWo or more ?rst-bite metabolic products. The consortia that can metaboliZe carbonaceous materials are poorly under also includes a doWnstream microbial consortium that con stood. The invention is based upon the identi?cation and verts a starting hydrocarbon metabolic product into a doWn isolation of consortia members that participate in the biogenic stream metabolic product. The doWnstream metabolic prod conversion of carbonaceous material, as Well as the hydro uct has a greater mol. % hydrogen than the starting carbons therein, into molecules With a higher molar percent hydrocarbon. The ?rst-bite microbial consortium or the age (mol. %) of hydrogen atoms than in the carbonaceous doWnstream microbial consortium include one or more spe material or hydrocarbons therein. Non-limiting examples of cies of Desulfuromonas. molecules With a high mol. % of hydrogen atoms include [0014] Embodiments of the invention also include isolated molecular hydrogen (H2) and methane (CH4). The isolated microbial consortia for biogenic methane production. The consortia of the invention may also be modi?ed to have consortia may include a ?rst microbial consortium that con enhanced abilities (e.g., an increased metabolic rate as a verts a starting hydrocarbon into one or more intermediate non-limiting example) to convert starting materials to hydro compounds. The consortia may also include a second micro carbons With a higher mol. % of hydrogen atoms. bial consortium that converts at least one type of the interme [0011] In a ?rst aspect, the invention provides microorgan diate compounds into CO2 and H2. The consortia may further isms that have been isolated from the environment in Which include a third microbial consortium that converts the CO2 they are naturally found, such as, but not limited to, those and H2 into methane and Water. At least one of the ?rst, second isolated from a geologic formation comprising other organ and third microbial consortiums comprises at least one spe isms and/or other chemical compounds found in the forma cies of Desulfuromonas. tion. In some embodiments, the microorganisms may be iso [0015] Embodiments of the invention may still further lated by reducing or removing one or more environmental include isolated microbial consortia for biogenic methane compounds found With the microorganisms. For example, if production that use an acetate metabolism step. The consortia the native microorganism environment is the Water present in may include a ?rst microbial consortium that converts a start the formation, then reducing the concentration of a hydrocar ing hydrocarbon into one or more intermediate compounds, bon (e.g., methane, oil, etc.) in extracted formation Water and a second microbial consortium that converts at least one produces isolated consortia of the microorganisms in the type of the intermediate compounds into acetate. The consor Water. Similarly, reducing the concentration of one or more tia may additionally include a third microbial consortium that other molecules from a sample or preparation of such Water converts the acetate into methane and Water. At least one of results in an isolate of microorganisms therein as an embodi the ?rst, second and third microbial consortiums comprises at ment of the invention. Non-limiting examples of such mol least one species of Desulfuromonas. ecules include carbon dioxide, one or more amines, one or [0016] In another aspect, the invention provides a consor more nitrates, one or more nitrites, one or more alcohols, one tium derived from a consortium isolated from a naturally or more organic acids, one or more sulfates, one or more occurring source. Non-limiting examples of such a derivative sul?tes, hydrogen, hydrogen sul?de (HZS), one or more halo consortium include those that have a different composition of gen ions (e. g., Cl“ and/or Br“ ions), and/ or one or more metal microorganisms due to selection by culture conditions as Well ions (e. g., ions of alkali metals, alkali earth metals, transition as those that have one or more non-naturally occurring micro metals, etc.) may also produce isolated consortia of the organisms due to mutation that occurred during culture or microorganisms from the formation Water. Isolated consortia maintenance of the consortium. may be produced as the formation Water ?oWs through a [0017] An additional aspect of the invention provides meth puri?cation and/or extraction system that removes the com ods of making a microbial consortia that biogenically pound(s) before being pumped back into the same, or a dif increases hydrogen and/or methane content of products ferent geological formation. Isolated consortia may also be derived from a carbonaceous source material. Thus a consor produced by extracting the native formation Water to a storage tium of microorganisms that does not have the capability of container, and removing the compound(s) from the stored increasing hydrogen and/ or methane content may be modi Water. ?ed by the invention to have that capability. Alternatively, a US 2012/0021495 A1 Jan. 26, 2012

consortium that has the capability may be modi?ed to Pseudomonas, Melhanobacler or other species of microor increase that capability. The invention provides a method of ganism With the same capabilities as the microorganisms and preparing a modi?ed (or augmented) consortium comprising consortia described herein. the addition of at least one species of the genus Desulfuromo [0021] For example, embodiments of the invention may nas to an unmodi?ed (or unaugmented) ?rst consortium. The include isolated microbial consortia for biogenically increas addition may be by the addition of a second consortium, ing the hydrogen content of a product derived from a starting containing a species of Desulfuromonas, to said ?rst consor hydrocarbon that includes complex hydrocarbons that make tium. The method may be preceded by the isolation of the up a carbonaceous material like coal or oil. The consortia species of Desulfuromonas or isolation of a microbial con includes a ?rst-bite microbial consortium that converts the sortium that contains the species. starting hydrocarbon into tWo or more ?rst-bite metabolic [0018] Where a second consortium is used to prepare a products. The consortia also includes a doWnstream micro modi?ed (or augmented) consortium, the second consortium bial consortium that converts a starting hydrocarbon meta may include microorganisms capable of converting or bolic product into a doWnstream metabolic product. The metaboliZing the carbonaceous source material into a ?rst set doWnstream metabolic product has a greater mol. % hydro of one or more intermediate hydrocarbons. The second con gen than the starting hydrocarbon. The ?rst-bite microbial sortium may also include a microbial consortium capable of consortium or the doWnstream microbial consortium include converting the intermediate hydrocarbons into a second set of one or more species of Fusibacler and/orAceZobacZerium. intermediate hydrocarbons. The hydrocarbons of the second [0022] Additional embodiments and features are set forth set of intermediate hydrocarbons may or may not have a in part in the description that folloWs, and in part Will become higher mol. % of hydrogen atoms than the ?rst set of inter apparent to those skilled in the art upon examination of the mediate hydrocarbons. In addition to the addition of a second speci?cation or may be learned by the practice of the inven consortium, a modi?ed consortium may further include a tion. The features and advantages of the invention may be third microbial consortium that converts the second set of realiZed and attained by means of the instrumentalities, com intermediate hydrocarbons into smaller hydrocarbons and binations, and methods described in the speci?cation. other metabolites such as Water and/or carbon dioxide. In some embodiments, the smaller hydrocarbons have a greater BRIEF DESCRIPTION OF THE DRAWINGS mol. % of hydrogen atoms than the starting carbonaceous [0023] FIG. 1 shoWs a simpli?ed schematic of the biogenic source material. conversion of carbonaceous materials to methane according [0019] In a further aspect, methods for the use of a micro to embodiments of the invention; bial consortium of the invention are provided. In some [0024] FIG. 2 shoWs a ?oWchart With method steps for embodiments, a consortium of the invention is introduced making and measuring the characteristics of a consortia into a geological formation to result in the production of according to embodiments of the invention; molecular hydrogen and/or methane by their metabolic [0025] FIG. 3 is plot of the methanogensis rate (umols of activities. The introduction may be accompanied by, pre methane/ gram of coal/ day) as a function of the percentage of ceded by, or folloWed by, introduction of one or more agents Desulfuromonas in a microorganism consortium; and to into the formation to result in conditions, in all or part of the [0026] FIG. 4 is a plot of the methanogensis rate (umols of formation, conducive to the groWth of microorganisms the methane/ gram of coal/ day) as a function of the percentage of consortium. In other embodiments, a consortium of the inven Fusibacler in a microorganism consortium. tion may be used in a method of stimulating a microbial consortia endogenous to a geological formation to increases DETAILED DESCRIPTION OF THE INVENTION hydrogen and/or methane production from a carbonaceous source material in the formation. In additional embodiments, [0027] Anaerobic consortia are described that can convert the method includes the introduction of one or more species starting hydrocarbons in native carbonaceous materials into of Desulfuromonas microorganisms, alone or in a consortium hydrocarbons having a greater mol. % of hydrogen atoms, comprising them, to the in situ environment of a group of such as methane. In some embodiments, such consortia con native microorganisms that are metaboliZing the carbon tain microorganisms that do not require molecular oxygen as aceous source material. The method may also include chang a terminal electron acceptor in their combined metabolism, ing an environmental condition in at least part of the forma but rather can perform methanogenesis as the ?nal electron tion to enhance the groWth of the one or more accepting step to produce methane. In their native state, car Desulfuromonas species and/or additional consortia of bonaceous materials such as coals and oils contain complex, microorganisms introduced into the formation to increase the polymeric hydrocarbons With multiple saturated and unsat population of the microbial consortia that biogenically urated carbon-carbon, carbon-nitrogen, carbon-sulfur, and increases hydrogen and/ or methane production from the car carbon-oxygen bonds. The hydrocarbons are also large, bonaceous source material in the formation. The changed Which as used herein refers to hydrocarbons of more than 20 environmental condition, or other condition for the microor carbon atoms and/ or 400 g/mol molecular Weight. Moreover, ganisms, may include temperature, pH, oxidation potential and as used herein, “hydrocarbon” refers to molecules con (Eh), microorganism nutrient concentrations, salinity, and taining only carbon and hydrogen atoms, optionally contain metal ion concentrations, among other environmental condi ing one or more nitrogen, sulfur, and oxygen atoms. The tions. invention provides microorganisms and consortia comprising [0020] In yet another aspect of the invention, embodiments them to convert the complex and/ or large hydrocarbons into of consortia and methods as described herein may include an smaller molecules, including smaller hydrocarbons With less identi?ed microorganism other than Desulfuromonas. They than 20 carbon atoms and/ or 400 g/mol molecular Weight. may, for example, include species from the genera Thermo [0028] When the microorganisms of a consortium as Zoga, Gelria, Closlridia, Moorella, Thermacelogenium, described herein convert these complex and/or large starting US 2012/0021495 A1 Jan. 26, 2012

hydrocarbons into smaller hydrocarbons, the ratio of CiC to [0032] Hydrocarbon-degrading microorganisms metabo CiH bonds is typically reduced, resulting in higher mol. % liZe the solid polymers 104 and/ or the aqueous polymers 106 of hydrogen atoms for the product molecules because of an into intermediate organic compounds 108, such as alkanes, increase in the number of hydrogen atoms relative to the alkenes, alkynes, aromatic compounds, alcohols, organic number of non-hydrogen atoms in a product molecule. For acids, and amines, among others. For example, native carbon example, acetic acid has the chemical formula CH3COOH, aceous materials like oil, Which are predominantly composed representing 2 carbon atoms, 2 oxygen atoms, and 4 hydrogen of saturated and unsaturated alkyl hydrocarbons, the organic atoms, to give a total of 8 atoms. Since 4 of the 8 atoms are compounds may include straight-chained or branched, hydrogen, the mol. % of hydrogen atoms in acetic acid is: (4 alkanes, alkenes, and alkynes. The metabolites may also Hydrogen Atoms)/ (8 Total Atoms):0.5, or 50%, by mol. (or include substituted and unsubstituted hydrocarbons, such as on a molar basis). Methane has the chemical formula CH4, ethers, aldehydes, ketones, alcohols, organic acids, amines, thiols, sul?des, and disul?des, among others. For native car representing 1 carbon atom and 4 hydrogen atoms, making a bonaceous materials like coal, Which have large, complex total of 5 atoms. The mol. % of hydrogen atoms in methane is arrays of highly unsaturated, benZene-like rings linked (4 Hydrogen Atoms)/(5 Total Atoms):0.8, or 80%, by mol. together, the depolymeriZation products may include substi Thus, the conversion of acetic acid to methane increases the tuted and unsubstituted, mono- and poly-aromatic hydrocar mol. % of hydrogen atoms from 50% to 80%. In the case of bons, including benZenes, naphthalenes, anthracenes, molecular hydrogen, the mol. % of hydrogen atoms is 100%. phenanthrenes, coronenes, etc .; substituted aromatics such as The invention includes microorganisms, as Well as consortia alkyl aromatics (e. g., toluene, xylene, styrene) aromatic alco and methods of using them, Wherein the net increase in the hols (e.g., phenol), aromatic amines (e.g., aniline), aromatic mol. % of hydrogen atoms, starting from a complex and/or aldehydes (e.g., benZaldehyde), aromatic acids (e. g., benZoic larger hydrocarbon to a ?nal smaller hydrocarbon, is from acid). etc.; and substituted and unsubstituted heterocyclic less than about 66% to 80 or 100%, from about 66% to 80 or aromatic groups, such as pyridines, pyrroles, imidaZoles, 100%, or from about 70% to 80 or 100%. furans, thiophenes, quinolines, indoles, etc. [0029] In some embodiments, each step of a microorgan [0033] Additional examples of depolymeriZation products ism or consortium’s metabolic pathWay increases the mol. % may include acetylene, 1,1,1-Trichloro-2,2-bis-(4-chlo of hydrogen atoms of the resultant metabolite. For example, rophenyl)ethane, acrylonitrile, 2-AminobenZoate, 1,3 in a three-step metabolic pathWay Where: (1) a portion of the Dichloropropene, Dichloromethane, Dimethyl sulfoxide, starting hydrocarbons in the native carbonaceous material are CarbaZole, BenZoate, p-Xylene, p-Cymene, Carbon tetra metaboliZed into a phenol; (2) the phenol is metaboliZed into chloride, Fluorene, Adamantanone, 3-Chloroacrylic Acid, acetic acid; and (3) the acetic acid is metaboliZed into meth 2-Chloro-N-isopropylacetanilide, 1,4-DichlorobenZene, Par ane, the mol. % of hydrogen atoms increases at each step. In athion, Toluene, Octane, NitrobenZene, 4-Chlorobiphenyl, other embodiments, intermediate steps in the metabolic path DibenZothiophene, Orcinol, Xylene, EthylbenZene, Mande Way may decrease the mol. % of hydrogen atoms. For late, Styrene, Trichloroethylene, Toluene-4-sulfonate, m-Xy example, another three-step metabolic pathWay may include lene, AtraZine, Naphthalenesulfonates, 2,4-Dichloroben the metabolic steps of: (1) converting native carbonaceous Zoate, ChlorobenZene, 2-AminobenZoic Acid, material to acetic acid; (2) converting the acetic acid to hydro 4-Chlorobiphenyl, EthylbenZene, Naphthalene, Chloroben gen (H2) and carbon dioxide (CO2); and (3) converting the H2 Zene, 1 -Aminocyclopropane-1-carboxylate, Biphenyl, and CO2 into methane and Water. For this metabolic pathWay, Caprolactam, Phenanthrene, 2,4,6-Trinitrotoluene, the mol. % of hydrogen atoms goes from 100% for H2, to 80% m-Cresol, Thiocyanate, Phenylmercuric chloride, n-Octane, for methane, Which represents a decrease in the mol. % hydro Dodecyl Sulfate, Bromoxynil, and DibenZothiophene, gen betWeen steps (2) and (3). HoWever, there is still an among other products. increase in the mol. % hydrogen betWeen the starting carbon [0034] Of course each of the above described compounds aceous materials and the ?nal metabolic product (i.e., meth may be produced in free form in the general environment ane). outside microorganisms of a consortium or in secluded form [0030] The biogenically produced hydrocarbons produce in or in betWeen particular microorganisms of a consortium. feWer pollutants than the native carbonaceous materials, This is particularly appropriate in the context of some including less sulfur and nitrogen oxides, and feWer volatile syntrophically related microorganisms, Which may pass one organic compounds (VOCs) caused by incomplete combus or more of the above compounds betWeen each other rather tion of polymeric hydrocarbons. Moreover, the loWer concen than diffusion into the general environment beyond the tration of carbon relative to hydrogen in these hydrocarbons microorganisms. means less carbon dioxide is produced upon combustion for [0035] The intermediate organic compounds 108 may then an equivalent amount of energy, reducing the rate at Which be further metaboliZed into a number of metabolites, includ this greenhouse gas is added to the atmosphere. ing hydrogen sul?de (HZS) 110, hydrogen (H2) and carbon [0031] Referring noW to FIG. 1, a simpli?ed schematic of dioxide (C02) 112, and acetic acid (i.e., acetate) 114. The the biogenic conversion of starting hydrocarbons in carbon quantity and types of metabolites produced depend on the aceous materials to methane is shoWn. Native carbonaceous make-up of the microorganism or consortium used to convert material 102 such as oil, coal, coke, kerogen, anthracite, coal the intermediate organic compounds. For example, consortia tar, bitumen, lignite, peat, carbonaceous shale, and sediments dominated by thiophillic microorganisms favor the produc rich in organic matter, among others, may include polymers tion of hydrogen sul?de 110, While consortia dominated by 1 04 that are insoluble in the surrounding formation Water, and acetogens and/or methanogens favor the production of other polymers 106, such as partially Water soluble polyaro acetate 114 and methane (CH4) 116, respectively. matics, that are present in the formation Water as Well as in [0036] Methane 116 may be produced from intermediate solid substrate. organic compounds 108 by a number of metabolic pathWays. US 2012/0021495 A1 Jan. 26, 2012

In some pathways, microorganisms may break doWn the sortia may start in an environment like oxygenated Water organic compounds 108 directly into hydrogen and carbon before being introduced into a sub-surface anaerobic forma dioxide 112. From this point, methanogens in the consortia tion environment. Such consortia start out With higher per may convert the hydrogen and carbon dioxide 112 into meth centages of aerobic microorganisms and/ or facultative anaer ane. In another pathWay, the organic compounds are ?rst obes (such as an aerobic consortium of Bacillus and/or converted by acetogens into acetate 114 and/or formate Geobacillus bacteria that metaboliZe the carbonaceous sub (HCOi). Microorganisms in the consortia may then trans strate of the formation into fermentation products) that use form or convert the acetate directly into methane 116 and the molecular oxygen in fermentation processes to metabo CO2, or ?rst convert the acetate into hydrogen and CO2 112, liZe carbonaceous materials in the formation. As the molecu Which methanogens then convert to methane 116 and Water. lar oxygen concentration decreases, groWth of the aerobes is [0037] For complex consortia made up of 10 or more, 20 or sloWed as anaerobic microorganisms or consortia metaboliZe more, 30 or more different species of microorganisms, it Will the aerobic fermentation products into organic compounds be appreciated that the conversion of one metabolite to With higher mol. % of hydrogen atoms. another may involve a plurality of microorganisms using a [0042] Consortia embodiments may be described by divid plurality of metabolic pathWays to metaboliZe a plurality of ing the consortia into three or more consortia de?ned by the intermediate compounds. function they play in the conversion of starting hydrocarbons [0038] Consortia described herein may be made up of one in native carbonaceous materials (like coal and oil) into end or more consortia (or subpopulations) of microorganisms, hydrocarbons like methane. The ?rst microbial consortium Where each consortium (or subpopulation) may be identi?ed (or subpopulation) of the consortia includes one or more by the role that the consortium plays in the overall conversion microorganisms that break doWn the starting hydrocarbons of starting carbonaceous materials to an end product. Each into one or more intermediate organic compounds. For consortium (or subpopulation) includes a plurality of micro example, When the carbonaceous material is bituminous coal, organisms that may belong to the same or different genus or one or more microorganisms of the ?rst consortium may split belong to the same or different species. When a consortium an alkyl group, or aromatic hydrocarbon from the polymeric (or subpopulation) includes a plurality of different species, hydrocarbon substrate. This process may be referred to as the individual species may Work independently or in concert to metaboliZing of the carbonaceous material, Whereby the carry out the role of the consortium. The term microorganism complex macromolecular compounds found in the carbon as used here includes bacteria, archaea, fungi, yeasts, molds, aceous material are decomposed into loWer molecular Weight and other classi?cations of microorganisms. Some microor hydrocarbon residues. ganisms can have characteristics from more than one classi [0043] The second microbial consortium (or subpopula ?cation (such as bacteria and fungi), and the term microor tion) includes one or more microorganisms that metaboliZe or ganism used here also encompasses these hybrid otherWise transform the intermediate organic compounds classi?cations of microorganisms. into other intermediate organic compounds, including com [0039] Because sub-surface formation environments typi pounds With oxidiZed, or more highly oxidiZed, carbons (e. g., cally contain less free atmospheric oxygen (e.g., 02) than alcohol, aldehyde, ketone, organic acid, carbon dioxide, etc.). found in tropospheric air, consortia are described as anaero These second stage intermediate organics are typically bic consortia. These anaerobic consortia are consortia that smaller, and may have higher mol. % of hydrogen atoms, than can live and groW in an atmosphere having less free oxygen the starting organic compounds, With one or more carbons than tropospheric air (e.g., less than about 18% free oxygen being split off as an oxidiZed carbon compound. “Oxidized by mol.). In some instances, anaerobic consortia operate in a carbon” refers to the state of oxidation about a carbon atom loW oxygen atmosphere, Where the 02 concentration is less Wherein an order of increasingly oxidiZed carbon atoms is than about 10% by mol., or less than about 5% by mol., or less from 4CiH (carbon bonded to hydrogen); to iC4OH than about 2% by mol., or less than about 0.5% by mol. The (carbon bonded to a hydroxyl group, such as an alcohol as a formation Water may also contain less dissolved oxygen than non-limiting example); 4C:O (carbon double-bonded to What is typically measured for surface Water (e.g., about 16 oxygen); iCOOH (carbon as part of a carboxyl group); and mg/L of dissolved oxygen). For example, the formation Water CO2 (carbon double-bonded to tWo oxygen atoms) Which is may contain about 1 mg/L or less of dissolved oxygen. the most oxidiZed form of carbon. As a carbon atom is more [0040] The microorganisms that make up the consortia may oxidiZed, the total energy associated With the bonds about that include obligate anaerobes that cannot survive in an atmo atom decreases. This is consistent With the general tendency sphere With molecular oxygen concentrations that approach that as microorganisms extract energy from carbon contain those found in tropospheric air (e.g., 18% to 21%, by mol. in ing molecules, they remove hydrogen atoms and introduce dry air) or those for Which oxygen is toxic. Consortia may oxygen atoms. As used herein, “oxidized carbon” does not also include facultative aerobes and anaerobes that can adapt include any carbon atom that is only bonded to hydrogen to both aerobic and anaerobic conditions. A facultative anaer and/or one or more carbon atoms. obe is one Which can groW in the presence or absence of [0044] Because carbon dioxide is generally considered to oxygen, but groW better in the presence of oxygen. A consor contain no obtainable energy, the present invention is based in tium can also include one or more microaerophiles that are part on the advantageous use of microorganisms to convert viable under reduced oxygen conditions, even if they prefer or the carbon atom in carbon dioxide into a higher energy state, require some oxygen. Some microaerophiles proliferate such as in methane. This may be considered a reversal of the under conditions of increased carbon dioxide of about 10% oxidation process that produced carbon dioxide by members mol or more (or above about 375 ppm). Microaerophiles of a consortium of the invention. include at least some species of Thermologa and Giardia. [0045] The third microbial consortium (or subpopulation) [0041] In some embodiments, the ratio of aerobes to anaer includes one or more microorganisms that metaboliZe the obes in consortia may change over time. For example, con ?nal intermediate organic compounds into at least one US 2012/0021495 A1 Jan. 26, 2012

smaller hydrocarbon (having a larger mol. % hydrogen than [0049] Native anaerobic consortia have been collected the intermediate hydrocarbon) and Water. For example, the from a variety of sub-surface formations, and studied in a ?nal intermediate compound may be formate (HCOi) that is controlled, loW-oxygen environment to classify the functions metabolized by members of the third consortium into meth of each consortium that make up the consortia, as Well as the ane and Water. This is another example of a reversal of the microorganisms that make up each consortium. Rates of bio oxidation process that led to formate. Consortia according to genic hydrocarbon production have also been compared these embodiments include at least one consortium of micro betWeen consortia to identify microorganisms, and combina organisms that do not form methane by the pathWay of reduc tions of consortia that are particularly effective at converting ing carbon dioxide to methane. This consortium may co-exist carbonaceous materials into other hydrocarbons that have in the consortia With other consortia that produce methane by higher mol. % hydrogen. Isolation of these microorganisms reducing carbon dioxide to produce methane. as consortia has led to the embodiments of the present inven [0046] In other embodiments, consortia may include one or tion, Which include an isolated microbial consortia compris more consortium (or subpopulations) having different func ing a ?rst microbial consortium capable of converting large tions than those described above. For example, consortia may and/or complex starting hydrocarbons into a product com include a ?rst consortium that breaks doWn the starting hydro prising one or more ?rst intermediate hydrocarbons; a second carbons in the carbonaceous material into one or more inter microbial consortium, comprising one or more species of mediate organic compounds, as described above. The second Desulfuromonas, capable of converting one or more of the consortium, hoWever, metaboliZes the intermediate organics ?rst intermediate hydrocarbons into a product comprising into carbon dioxide and molecular hydrogen (H2). A third one or more second intermediate hydrocarbons and one or consortium, Which includes one or more methanogens, may more molecules comprising oxidiZed carbon; and a third convert CO2 and H2 into methane and Water. microbial consortium capable of converting one or more of [0047] A consortia may include intraconsortium and inter the second intermediate hydrocarbons into a product com consortium syntrophic interactions. For example, members prising one or more smaller hydrocarbons and Water, Wherein of the second and third consortia above may form a the smaller hydrocarbons have a greater mol. % hydrogen syntrophic acetate oxidation pathWay, Where acetate is con than the large and/ or complex hydrocarbons. verted to methane at an enhanced metabolic rate. Microor [0050] In these embodiments, the large and/or complex ganisms in the second consortium convert acetic acid and/or starting hydrocarbons may be those of a carbonaceous source acetate (H3CCOO_) into carbon dioxide and hydrogen, Which material, such as coal, oil, kerogen, peat, lignite, oil shale, tar may be rapidly metabolized by methanogens in the third sands, bitumen, and tar as non-limiting examples. Moreover, consortium into methane and Water. Removal of second con the product comprising one or more ?rst intermediate hydro sortium metabolites (e.g., hydrogen, carbon dioxide) by carbons may contain a molecule selected from an organic members of the third consortium prevents these metabolites acid, an alcohol, an amine, a straight or branched hydrocar from building up to a point Where they can reduce metabolism bon, and an aromatic hydrocarbon. The product comprising and groWth in the second consortium. In turn, the second one or more second intermediate hydrocarbons may contains consortium provides a steady supply of starting materials, or a molecule selected from formate, acetate, and benZoate. In nutrients, to members of the third consortium. This some particular embodiments, the one or more smaller hydro syntrophic interaction betWeen the consortia results in the carbons comprises methane. In other embodiments, the mol metabolic pathWay that converts acetate into methane and ecules comprising oxidiZed carbon comprises CO and/or Water being favored by the consortia. Syntrophic interactions C02. may also be formed betWeen microorganism populations at [0051] In many embodiments of the invention, a consor other points in a metabolic process, and may be established tium comprises bacteria and/or archaea (archaebacteria). The betWeen members Within a consortium (i.e., an intraconsor ?rst, second, or third microbial consortium of the invention tium interaction), as Well as betWeen members of different may comprise or consist of one or more obligate anaerobic consortia (i.e., and interconsortium interaction). For example, microorganism or facultative anaerobic microorganism or a syntrophic interaction may exist betWeen acetogens, Which microaerophile as described herein. Alternatively, the ?rst, form the acetate, and the microorganisms that oxidiZe the second, and third microbial consortium may each comprise or acetate into carbon dioxide and hydrogen. In metabolic pro consist of one or more obligate anaerobic microorganism or cesses With multiple steps, several syntrophic interactions facultative anaerobic microorganism or microaerophile. may occur doWn the pathWay from reactants to products. [0052] In some embodiments, the ?rst microbial consor [0048] Thus as used herein, syntrophy refers to symbiotic tium comprises microorganisms of the genera Desulfuromo cooperation betWeen tWo metabolically different types of nas, Pseudomonas, Bacillus, Geobacillus, and/or Closlridia, microorganisms (partners) Wherein they rely upon each other While the second microbial consortium comprises microor for degradation of a certain substrate. This often occurs ganisms of the genera Desulfuromonas, Thermologa, through transfer of one or more metabolic intermediate(s) Pseudomonas, Gelria and/orMoorella.Alternatively, the sec betWeen the partners. For e?icient cooperation, the number ond consortium may comprise Thermacelogenium, such as and volume of the metabolic intermediate(s) has to be kept Thermacelogenium phaeum. The third microbial consortium loW. In one non-limiting example pertinent to the present may comprise microorganisms of the genus Desulfuromonas invention, syntrophs include those organisms Which oxidiZe and/or Melhanobacler, such as, but not limited to, Methano fermentation products from methano gens, such as propionate bacler lhermoaulolrophicus and/or Melhanobacler wolfeii. and butyrate, that are not utiliZed by the methano gens. These In another example, the third microbial consortium may com organisms require loW concentrations of molecular hydrogen prise microorganisms of the genera Melhanosarcina, Metha to ferment substrates to carbon dioxide, so are symbiotic With nocorpusculum, Melhanobrevibacler, Melhanolhermo methanogens, Which help maintain loW molecular hydrogen bacler, Melhanolobus, Melhanohalophilus, levels. Melhanococcoides, Melhanosalsus, Melhanosphaera, and/ US 2012/0021495 A1 Jan. 26, 2012

or Melhanomelhylovorans, among others. Embodiments of rial may include aerobes such as Bacillus and Geobacillus the consortia may also include microorganisms from the gen bacteria, and anaerobes like Closlridia, among other micro era Granulicalella, Acinelobacler, Fervidobaclerium, organisms. Anaerobaculum, Ralslonia, Sulfurospirullum, Acidovorax, [0058] The metabolic products, Which may also be called Rikenella, Thermoanaeromonas, Desulfovibrio, Dechlo anaerobic fermentation products, may be further metaboliZed romonas, Acelogenium, Ferribacler, and Thiobacillus, into hydrocarbons having a greater mol. % of hydrogen among other microorganisms. atoms. The microorganisms involve here may include one or [0053] In yet additional embodiments, an isolated micro more microorganisms from the ?rst consortium and/or other bial consortia for biogenically producing methane from a microorganisms to make a second consortium, Which metaboliZe the ?rst metabolic products into additional hydro starting hydrocarbon is provided. This consortia comprises a carbons and oxidiZed carbon (e.g., alcohols, organic acids, ?rst microbial consortium to convert the starting hydrocarbon carbon monoxide, carbon dioxide, etc .). Microorganisms that into a product containing one or more intermediate hydrocar may be associated With a consortium de?ned by this meta bon compounds; a second microbial consortium to convert bolic stage may include Desulfuromonas, Pseudomonas, the intermediate carbon compounds into a product compris Thermologa, Gelria (e.g., Gelria glulamica), Closlridia (e.g., ing carbon dioxide and molecular hydrogen; and a third Closlridia fervidus), and/or Moorella (e.g., Moorella glyc microbial consortium to convert the carbon dioxide and erini, Moorella mulderi) microorganisms. molecular hydrogen into methane and Water. The ?rst micro [0059] In addition to Desulfuromonas, Thermologa species bial consortium comprises a ?rst group of microorganisms are identi?ed in a number of consortia that are ef?cient at capable of converting the starting hydrocarbon into a product producing methane from carbonaceous substrate. Speci?c comprising intermediate organic compounds, and a second Thermologa species identi?ed include Thermologa hypogea, group of microorganisms capable of converting the interme Thermologa lellingae, Thermologa subterranean, Therma diate organic compounds into a product comprising smaller Zoga el?i, Thermologa marlima, Thermologa neapolilana, organic compounds. At least one of the ?rst, second and third Thermologa Zhernarum, and Thermologa pelrophila, among microbial consortiums may include at least one species of others. Without being bound by theory, and offered to Desulfuromonas. For example, the ?rst consortium may improve understanding of the invention, Thermologa micro include a Desulfuromonas microorganism, the second con organisms are believed to play a role in the anaerobic oxida sortium may include a Desulfuromonas microorganism, and/ tion of hydrocarbons to alcohols, organic acids (e.g., acetic or the third consortium may include a Desulfuromonas micro acid), and carbon dioxide. For example, a Thermalaga hypo organism. gea microorganism in the context of the invention may metaboliZe a substrate depolymeriZation product into acetic [0054] In some embodiments, the intermediate organic acid, carbon dioxide, and other organic alcohols and/ or acid. compounds comprise aromatic compounds. In other embodi DoWnstream microorganisms may then metaboliZe the acetic ments, the product comprising smaller organic compounds acid into hydrogen (H2) and carbon dioxide, Which is then includes a molecule selected from the group consisting of assimilated into methane and Water by another consortium of formate, acetate, benZoate, an alcohol, and an organic acid. microorganisms (e.g., methanogens). [0055] In such consortia, the starting hydrocarbon may be [0060] Downstream microorganisms that can metaboliZe that present in crude oil or coal. Non-limiting examples also the acetic acid include Thermacelogenium microorganisms, include those Where the starting hydrocarbon is present in a such as Thermacelogenium phaeum, Which metaboliZes the subsurface geological formation, such as that of an oil forma acetic acid into carbon dioxide and hydrogen (H2). While not tion, a natural gas formation, a coal formation, a bitumen Wishing to be bound by a particular theory of metabolic formation, a tar sands formation, a lignite formation, a peat action, it is believed that the higher rates of methane produc formation, a carbonaceous shale formation, and a formation tion measured for consortia having Thermologa microorgan comprising sediments rich in organic matter. isms may be attributed to syntrophic interactions betWeen the [0056] Other isolated microbial consortia for anaerobic Thermologa and doWnstream microorganisms like Thermac production of methane from a larger hydrocarbon include elogenium phaeum, Which metaboliZe acetic acid. The those comprising a ?rst microbial consortium to convert the syntrophic interaction may be caused by the Thermologa and starting hydrocarbon to form a product comprising smaller Thermacelogenium microorganisms having similar meta hydrocarbons; and a second microbial consortium to convert bolic responses to environmental characteristics. For at least a portion of the smaller hydrocarbons to form a prod example, the microorganisms may have similar metabolic uct comprising acetate; and a third microbial consortium to responses to changes in temperature, pH, Eh, nutrient con convert said acetate to form methane and Water. The third centrations, etc., that can syntrophically amplify an overall microbial consortium may comprise a ?rst group of microor change in the metabolic activity of consortia. ganisms that convert acetate into carbon dioxide and free [0061] The carbon dioxide and hydrogen may be metabo hydrogen, and a second group of microorganisms that convert liZed into methane and Water by a doWnstream consortium the carbon dioxide and free hydrogen into methane and Water. that includes one or more methanogens. The methanogens At least one of the ?rst, second and third microbial consor may include methanogenic archaea such as Methanobacteri tiums may include at least one species of Desulfuromonas. ales, Methanomicrobacteria, Methanopyrales, and Methano For example, the ?rst consortium may include a Desulfu coccales. Methanogenic microorganisms identi?ed in meth romonas microorganism, the second consortium may include ane producing consortia include Melhanobacler a Desulfuromonas microorganism, and/or the third consor lhermoaulolrophicus, and Melhanobacler wolfeii, among tium may include a Desulfuromonas microorganism. others. Here again, While not Wishing to be bound by a par [0057] Microorganisms of the invention identi?ed as being ticular theory of metabolic action, it is believed that a involved in the initial conversion of the carbonaceous mate syntrophic interaction may occur betWeen the up stream Ther US 2012/0021495 A1 Jan. 26, 2012

macetogenium and the downstream Methanobacter to [0064] One or more of the consortiums may include a Des syntrophically enhance the overall metabolic activity of the ulf0micr0bium bacteria such as Desulfomicrobium apsher consortia. The Methanobacter remove hydrogen and carbon onum, Desulfomicrobium baculatum, Desulfomicrobium dioxide produced by the Thermacetogenium, Which prevents escambiense, Desulfomicrobium hypogeium, Desulfomicro a buildup of these materials that could hinder the Thermac bium macestii, Desulfomicrobium norvegicum, Desulfomi etogenium from making additional CO2 and H2. cr0bium 0rale, Desulfomicrobium sp. 63, Desulfomicrobium [0062] Embodiments of the consortia may include metha sp. ADR21, Desulfomicrobium sp. ADR26, Desulfomicro no gens that metaboliZe starting materials other that acetate, or bium sp. ADR28, Desulfomicrobium sp. AR1902/01, Des carbon dioxide and hydrogen, into methane. For example, the ulfomicrobium sp. ‘Bendigo B’ Desulfomicrobium sp. BL, consortia may include methanogens that metaboliZe alcohols Desulfomicrobium sp. Bsl6, Desulfomicrobium sp. C4, Des (e.g., methanol), amines (e.g., methylamines), thiols (e.g., ulfomicrobium sp. ‘Clear 59m’, Desulfomicrobium sp. methanethiol), and/or sul?des (e.g., dimethyl sul?de) into CME2, Desulfomicrobium sp. ‘Delta +’, Desulfomicrobium sp. DsvB, Desulfomicrobium sp. La1.1, Desulfomicrobium methane. These may include methanogens from the genera sp. MSL65, Desulfomicrobium sp. MSL92, Desulfomicro Methanosarcina (e.g., Methanosarcina barkeri, Methanosa bium sp. MSL93, Desulfomicrobium sp. MSL94, Desulfomi rcina thermophile, Methanosarcina siciliae, Methanosarcina cr0bium sp. MSL95, Desulfomicrobium sp. MSL97, Desulfo acidovorans, Methanosarcina mazeii, Methanosarcina fri microbium sp. MSL98, Desulfomicrobium sp. oral clone sius); Methanolobus (e.g., Methanolobus bombavensis, BP1-74, Desulfomicrobium sp. POO4A, Desulfomicrobium Methanolobus tindarius, Methanolobus vulcani, Methanolo sp. SA2, Desulfomicrobium sp. ‘Scale 10m’, Desulfomicro bus taylorii, Methanolobus oregonensis); Methanohalophi bium sp. ‘Scale 7m’, Desulfomicrobium sp. ‘Scale 9m’, Des lus (e.g., Methanohalophilus mahii, Methanohalophilus ulfomicrobium sp. ‘Scale sediment’, Desulfomicrobium sp. euhalobius); Methanococcoides (e.g., Methanococcoides STPlO, Desulfomicrobium sp. STP16, and/or Desulfomicro methylutens, Methanococcoides burtonii); and/or Methanos bium thermophilum. alsus (e.g., Methanosalsus zhilinaeae). They may also be [0065] One or more of the consortiums may include a methanogens from the genus Methanosphaera (e.g., Metha microorganism selected from Desulfacinum subterraneum, nosphaera stadtmanae and Methanosphaera cuniculi, Which Desulfacinum sp. M40/2 ClV-2.3, Desulfacinum hydrother are shoWn to metaboliZe methanol to methane). They may male, Desulfacinum infernum, Desulfatimicrobium mahr further be methanogens from the genus Methanomethylo esensis, Desulfobacca acetoxidans, Desulfoglaeba sp. Lake, vorans (e.g., Methanomethylovorans hollandica, Which is Desulfoglaeba alkanexedens, Desulfomonile limimaris, Des shoWn to metaboliZe methanol, dimethyl sul?de, meth ulfomonile tiedjei, Desulforhabdus sp. DDT, Desulforhabdus anethiol, monomethylamine, dimethylamine, and trimethy sp. BKAll, Desulforhabdus amnigena, Desulfovirga adi lamine into methane). pica, Smithella propionica, Syntrophobacter fumaroxidans [0063] In addition, one or more of the consortiums may MPOB, Syntrophobacter sulfatireducens, Syntrophobacter include microorganisms selected from Desulfuromonadales sp. ECP4C3, Syntrophobacter pfennigii, Syntrophobacter bacterium JN18 A94 J, Desulfuromonadales bacterium Tc37, fumaroxidans, Syntrophobacter sp. DSM 10017, Syntropho Desulfuromonas acetexigens, Desulfuromonas acetoxidans, bacter sp., Syntrophobacter wolinii, Syntrophus aciditrophi Desulfuromonas acetoxidans DSM 684, Desulfuromonas cus, Syntrophus aciditrophicus SB, Syntrophus sp., Syntro alkaliphilus, Desulfuromonas chloroethenica, Desulfuromo phus gentianae, Syntrophus buswellii, nas michiganensis, Desulfuromonas palmitatis, Desulfu Thermodesulforhabdus sp.NS-tSRB-1, Thermodesulforhab romonas sp. CD-1, Desulfuromonas sp. FD-l, Desulfuromo dus n. sp. M40/2 ClV-3.2, and Thermodesulforhabdus nor nas sp. SDB-1, Desulfuromonas sp. SDB-2, Desulfuromonas vegica. thiophila, Desulfuromusa bakii, Desulfuromusa kysingii, [0066] One or more of the consortiums may include a Desulfuromusa sp. Fe30-7C-S, Desulfuromusa sp. S1, Des microorganism selected from Bilophila wadsworthia, Des ulfuromusa succinoxidans, Geoalkalibacterferrihydriticus, ulfohalobiaceae bacterium BenZ, Desulfohalobium ret Geobacter argillaceus, Geobacter bemidjiensis, Geobacter baense, Desulfohalobium utahense, Desulfomicrobium apsh bemidjiensis Bem, Geobacter bremensis, Geobacter chapel eronum, Desulfomicrobium baculatum, Desulfomicrobium leii, Geobacter grbiciae, Geobacter hephaestius, Geobacter escambiense, Desulfomicrobium hypogeium, Desulfomicro humireducens, Geobacter hydrogenophilus, Geobacter lov bium macestii, Desulfomicrobium norvegicum, Desulfomi leyi, Geobacter lovleyi SZ, Geobacter metallireducens, Geo cr0bium 0rale, Desulfomicrobium sp., Desulfomicrobium sp. bacter metallireducens GS-15, Geobacter pelophilus, Geo 63, Desulfomicrobium sp. ADR21, Desulfomicrobium sp. bacter pickeringii, Geobacter psychrophilus, Geobacter sp. ADR26, Desulfomicrobium sp. ADR28, Desulfomicrobium CLFeRB, Geobacter sp. ENNl, Geobacter sp. PRC-32, Geo sp. AR1902/01, Desulfomicrobium sp. Bendigo B’ Desulfo bacter sp. M18, Geobacter sp. M21, Geobacter sp. Plyl, micr0bium sp. BL, Desulfomicrobium sp. Bsl6, Desulfomi Geobacter sp. Ply4, Geobacter sp. TM] 1, Geobacter sp. cr0bium sp. C4, Desulfomicrobium sp. ‘Clear 59m’, Desulfo VES-l, Geobacter sulfurreducens, Geobacter sulfurre micr0bium sp. CME2, Desulfomicrobium sp. ‘Delta +’, ducens PCA, Geobacter uraniumreducens, Geobacter urani Desulfomicrobium sp. DsvB, Desulfomicrobium sp. La1.1, umreducens Rf4, Geobacteraceae bacterium JN18_V95_J, Desulfomicrobium sp. MSL65, Desulfomicrobium sp. Geopsychrobacter electrodiphilus, Geothermobacter ehrli MSL92, Desulfomicrobium sp. MSL93, Desulfomicrobium chii, Geothermobacter sp. Fe30-MC-S, Malonomonas rubra, sp. MSL94, Desulfomicrobium sp. MSL95, Desulfomicro Pelobacter acetylenicus, Pelobacter acidigallici, Pelobacter bium sp. MSL97, Desulfomicrobium sp. MSL98, Desulfomi carbinolicus, Pelobacter carbinolicus DSM 2380, Pelo crobium sp. oral clone BP1-74, Desulfomicrobium sp. bacter masseliensis, Pelobacterpropionicus, Pelobacterpro POO4A, Desulfomicrobium sp. SA2, Desulfomicrobium sp. pionicus DSM 2379, Pelobacter sp. A3b3, Pelobacter vene ‘Scale 10m’; Desulfomicrobium sp. ‘Scale 7m’, Desulfomi tianus, and Trichlorobacter thiogenes. crobium sp. ‘Scale 9m’, Desulfomicrobium sp. ‘Scale sedi US 2012/0021495 A1 Jan. 26, 2012

ment’, Desulfomicrobium sp. STP10, Desulfomicrobium sp. ulfovibrio sp. FSRs, Desulfovibrio sp. G05V111, Des STP16, Desulfomicrobium lhermophilum, Desulfomonas ulfovibrio sp. GO5XV, Desulfovibrio sp. GO5XV1, Des oviles, Desulfonalronovibrio hydrogenovorans, Des ulfovibrio sp. GO5XV11, Desulfovibrio sp. G1001X, ulfonalronum cooperalivum, Desulfonalronum lacuslre, Des Desulfovibrio sp. G100V, Desulfovibrio sp. G 100V1, Des ulfonalronum sp. DsVA, Desulfonalronum Zhiodismulans, ulfovibrio sp. G200V111, Desulfovibrio sp. G50V11, Des Desulfonaulicus submarinus, Desulfolhermus naphlhae, ulfovibrio sp. G50X1V, Desulfovibrio sp. G5V, Desulfovibrio Desulfolhermus okinawensis, Desulfovermiculus halophilus, sp. G5Vll, Desulfovibrio sp. GWE2, Desulfovibrio sp. HRS Desulfovibrio acrylicus, Desulfovibrio aerololerans, Des La4, Desulfovibrio sp. HS2, Desulfovibrio sp. 1C1, Des ulfovibrio aespoeensis, Desulfovibrio a?’icanus, Des ulfovibrio sp. IMP-2, Desulfovibrio sp. lrT-JGl-58, Des ulfovibrio alaskensis, Desulfovibrio alcoholovorans, Des ulfovibrio sp. lrT-JGl-7l, Desulfovibrio sp. JCM 14577, ulfovibrio alkalilolerans, Desulfovibrio aminophilus, Desulfovibrio sp. JD160, Desulfovibrio sp. 1G1, Des Desulfovibrio arclicus, Desulfovibrio baarsii, Desulfovibrio ulfovibrio sp. 1G5, Desulfovibrio sp. L3, Desulfovibrio sp. baslinii, Desulfovibrio bizerlensis, Desulfovibrio brasilien L7, Desulfovibrio sp. La1.2, Desulfovibrio sp. Lal.3, Des sis, Desulfovibrio burkinensis, Desulfovibrio calcdoniensis, ulfovibrio sp. La1H2, Desulfovibrio sp. La2, Desulfovibrio Desulfovibrio capillalus, Desulfovibrio carbinolicus, Des sp. LBl,Desulf0vibri0 sp. LM4105, Desulfovibrio sp. LNB1, ulfovibrio carbinoliphilus, Desulfovibrio cavernae, Des Desulfovibrio sp. LNB2, Desulfovibrio sp. LS1101/00, Des ulfovibrio cunealus, Desulfovibrio dechloracelivorans, Des ulfovibrio sp. LS1104/00, Desulfovibrio sp. LS1415/01, Des ulfovibrio desulfuricans, Desulfovibrio desulfuricans G20, ulfovibrio sp. LS2001/01, Desulfovibrio sp. LS2003/01, Des Desulfovibrio desulfuricans subsp. aesluarii, Desulfovibrio ulfovibrio sp. LVform6, Desulfovibrio sp. LVS-l, desulfuricans subsp. desulfuricans, Desulfovibrio faiiy‘ield Desulfovibrio sp. LVS-10, Desulfovibrio sp. LVS-l3, Des ensis, Desulfovibrio ferrireducens, Desulfovibrio ferrophi ulfovibrio sp. LVS-15, Desulfovibrio sp. LVS-21, Des lus, Desulfovibrio frigidus, Desulfovibrio fruclosovorans, ulfovibrio sp. LVS-26, Desulfovibrio sp. M2, Desulfovibrio Desulfovibrio gabonensis, Desulfovibrio giganleus, Des sp. Met 82, Desulfovibrio sp. midrefl29, Desulfovibrio sp. ulfovibrio gigas, Desulfovibrio gracilis, Desulfovibrio halo midrefl32, Desulfovibrio sp. midrefl38, Desulfovibrio sp. philus, Desulfovibrio hydrolhermalis, Desulfovibrio indone midrefl4l, Desulfovibrio sp. midrefl45, Desulfovibrio sp. siensis, Desulfovibrio inopinalus, Desulfovibrio inleslinalis, Mlhm, Desulfovibrio sp. MS, Desulfovibrio sp. MSL10, Des Desulfovibrio longreachensis, Desulfovibrio longus, Des ulfovibrio sp. MSL15, Desulfovibrio sp. MUS1, Des ulfovibrio magnelicus, Desulfovibrio marrakechensis, Des ulfovibrio sp. N50XV11, Desulfovibrio sp. N5Xl, Des ulfovibrio mexicanus, Desulfovibrio muliispirans, Des ulfovibrio sp. N5X11, Desulfovibrio sp. NA104, ulfovibrio oliviopondense, Desulfovibrio oryzae, Desulfovibrio sp. NA202, Desulfovibrio sp. NA302, Des Desulfovibrio oxyclinae, Desulfovibrio pangongensis, Des ulfovibrio sp. NA81, Desulfovibrio sp. NB21, Desulfovibrio ulfovibrio piger, Desulfovibrio piger ATCC 29098, Des sp. NB62, Desulfovibrio sp. NC301 , Desulfovibrio sp. NUS2, ulfovibrio profundus, Desulfovibrio pulealis, Desulfovibrio Desulfovibrio sp. oral clone BB161, Desulfovibrio sp. PlB2, salexigens, Desulfovibrio senezii, Desulfovibrio simplex, Desulfovibrio sp. PA35E4, Desulfovibrio sp. PCPl, Des Desulfovibrio singaporenus, Desulfovibrio sp., Des ulfovibrio sp. PL35L1, Desulfovibrio sp. Prl.2, Des ulfovibrio sp. 160, Desulfovibrio sp. 49MC, Desulfovibrio sp. ulfovibrio sp. PT-2, Desulfovibrio sp. R2, Desulfovibrio sp. A1, Desulfovibrio sp. A-l, Desulfovibrio sp. A2, Des PB5E1, Desulfovibrio sp. SA1, Desulfovibrio sp. SA-6, Des ulfovibrio sp. A4, Desulfovibrio sp. A45, Desulfovibrio sp. ulfovibrio sp. SBl, Desulfovibrio sp. sponge 85CD, Des ABHUl SB, Desulfovibrio sp.ABHU1SBfatS, Desulfovibrio ulfovibrio sp. SRB D2, Desulfovibrio sp. STL12, Des sp. ABHU2SB, Desulfovibrio sp. Ac5.2, Desulfovibrio sp. ulfovibrio sp. STL13, Desulfovibrio sp. STL2, Desulfovibrio An30H-nmr, Desulfovibrio sp. An30N-mm, Desulfovibrio sp. STL3, Desulfovibrio sp. STL7, Desulfovibrio sp. STPl, sp. ANDl, Desulfovibrio sp. ANP3, Desulfovibrio sp. Desulfovibrio sp. STP4, Desulfovibrio sp. STP5, Des AR1102/00, Desulfovibrio sp. AR1103, Desulfovibrio sp. ulfovibrio sp. STP7, Desulfovibrio sp. STP8, Desulfovibrio AR1103/00, Desulfovibrio sp.AR1104/00, Desulfovibrio sp. sp. STP9, Desulfovibrio sp. TBP-l, Desulfovibrio sp. UIV, AR1201/00, Desulfovibrio sp. AR1202/00, Desulfovibrio sp. Desulfovibrio sp. UNSW3caefatS, Desulfovibrio sp. W002, AR1203/00, Desulfovibrio sp. AR1205/00, Desulfovibrio sp. Desulfovibrio sp. X, Desulfovibrio sp. ZlRB-2, Desulfovibrio AR1206/00, Desulfovibrio sp.AS36, Desulfovibrio sp. BBD sp. Zt10e, Desulfovibrio sp. Zt3l, Desulfovibrio sulfodismu 10, Desulfovibrio sp. BBD-ll, Desulfovibrio sp. BBD-l5, tans, Desulfovibrio Zermilidis, Desulfovibrio vielnamensis, Desulfovibrio sp. BBD-l6, Desulfovibrio sp. BBD-l9, Des Desulfovibrio vulgaris, Desulfovibrio vulgaris str. ‘MiyaZaki ulfovibrio sp. BBD-2, Desulfovibrio sp. BBD-22, Des F’, Desulfovibrio vulgaris subsp. oxamicus, Desulfovibrio ulfovibrio sp. BBD-6, Desulfovibrio sp. ‘Bendigo A’, Des vulgaris subsp. oxamicus (strain Monticello), Desulfovibrio ulfovibrio sp. BG50, Desulfovibrio sp. BG6, Desulfovibrio vulgaris subsp. vulgaris, Desulfovibrio vulgaris subsp. vul sp. BL-l57, Desulfovibrio sp. Bsl2, Desulfovibrio sp. BST-A, garis DP4, Desulfovibrio vulgaris subsp. vulgaris str. Hilden Desulfovibrio sp. BST-B, Desulfovibrio sp. BST-C, Des borough, Desulfovibrio zoslerae, Desulfovibrionaceae bac ulfovibrio sp. BSY-A, Desulfovibrio sp. BSY4C, Des Zerium MSL79, Desulfovibrionaceae bacterium MSL80, ulfovibrio sp. C/L2, Desulfovibrio sp. CME3, Desulfovibrio Desulfovibrionaceae bacterium WN022, Desulfovibrionales sp. D1, Desulfovibrio sp. D4, Desulfovibrio sp. ds2-2, Des bacterium H0407il2.lLac, Desulfovibrionales bacterium ulfovibrio sp. DSM 9953, Desulfovibrio sp. DSM12803, Des H0407i23jLac, Desulfovibrionales bacterium H0407i2. ulfovibrio sp. DsVC, Desulfovibrio sp. E2, Desulfovibrio sp. 3jLac/Ac, Desulfovibrionales bacterium HAW-EB18, Des EBD, Desulfovibrio sp. EX265, Desulfovibrio sp. FDl, Des ulfovibrionales bacterium Spi55, Lawsonia cf. intracellu ulfovibrio sp. FHM107, Desulfovibrio sp. FSPa-4-5, Des laris, Lawsonia inlracellularis, and Lawsonia inlracellularis ulfovibrio sp. FSR12A, Desulfovibrio sp. FSR12B, Des PHE/MNl-00. ulfovibrio sp. FSR14A, Desulfovibrio sp. FSR14B, [0067] One or more of the consortiums may include a Desulfovibrio sp. FSR17A, Desulfovibrio sp. FSR17B, Des microorganism selected from Desulfalibacillum aliphati US 2012/0021495 A1 Jan. 26, 2012

civorans, Desulfalibacillum alkenivorans, Desulfalibacillum acetate groups, hydrogen gas, and carbon dioxide. TWo gen alkenivorans AK-Ol, Desulfalibacillum sp. Pnd3, Desulfali era of Closlridia bacteria, Acelobaclerium and Fusibacler, bacillus ole?nivorans, Desulfoarculus sp. BG74, Desulfo placed in hydrocarbon-bearing environments (e.g., under bacler curvalus, Desulfobacler halololerans, Desulfobacler ground oil storage cavities, oil producing Wells, etc.) may hydrogenophilus, Desulfobacler lalus, Desulfobacler posi participate in the conversion of in-situ complex hydrocarbon galei, Desulfobacler psychrololerans, Desulfobacler sp., substrates (e.g., oil) to acetate, methane and/or hydrogen gas. Desulfobacler sp. ASv25, Desulfobacler sp. BG23, Desulfo The full taxonomic identi?cation of each genera are as fol bacler sp. BG72, Desulfobacler sp. BG8, Desulfobacler sp. loWs:

Domain Phylum Class Order Family Genus

Bacteria Firrnicutes Clostridia Clostridiales Eubacteriaceae Acelabaclerium Bacteria Firrnicutes Clostridia Clostridiales Peptostreptococcaceae Fusibacler

DSM 2035, Desulfobacler sp. DSM 2057, Desulfobacler [0069] Both genera may include species that produce vibrioformis, Desulfobacleraceae bacterium 166, Desulfo acetate through the fermentation of starting hydrocarbons. bacleraceae bacterium 171, Desulfobacleraceae bacterium Acelobaclerium species may also generate acetate through 175, Desulfobacleraceae bacterium MSL53, Desulfobacler homoacetogenesis using hydrogen gas and carbon dioxide. aceae bacterium MSL71, Desulfobaclerium anilini, Desulfo Both genera may also include species that generate hydrogen bacterium aulolrophicum, Desulfobaclerium aulolrophicum gas, With some Acelobaclerium species having a syntrophic HRM2, Desulfobaclerium calecholicum, Desulfobaclerium relationship With methanogens When producing the hydro celonicum, Desulfobaclerium corrodens, Desulfobaclerium gen. indolicum, Desulfobaclerium sp.AK1, Desulfobaclerium sp. [0070] These Closlridia consortiums may include one or BG18, Desulfobaclerium sp. BG33, Desulfobaclerium sp. more genera of synlrophomonadaceae microorganisms such BSv41, Desulfobaclerium sp. LSv25, Desulfobaclerium sp. as Aminiphilus circumscriplus, Aminobaclerium c0l0mbi MB-2005, Desulfobaclerium sp. PM4, Desulfobaclerium ense, Aminobaclerium mobile, Aminomonas paucivorans, vacuolalum, Desulfobaclerium Zeppelinii, Desulfobacula Anaerobaculum mobile, Anaerobaculum sp. TERlOOl, phenolica, Desulfobacula Z0lu0lica, Desulfobolulus sapo Anaerobaculum lhermolerrnum, Anaerobranca cali ornien vorans, Desulfobolulus sp. BG14, Desulfobulbus elongales, sis, Anaerobranca gollschalkii, Anaerobranca horikoshii, Desulfobulbusjaponicus, Desulfobulbus marinus, Desulfob Anaerobranca zavarzinii, Caldicellulosiruplor aceligenus, ulbus medilerraneus, Desulfobulbus propionicus, Desulfob Caldicellulosiruplor hydrolhermalis, Caldicellulosiruplor ulbus rhabdoformis, Desulfobulbus sp. ‘Ace 16m’, Desulfob krisljanssonii, Caldicellulosiruplor kronolskiensis, Caldicel ulbus sp. BG25, Desulfobulbus sp. ‘Clear 54 m’ lulosiruplor lacloacelicus, Caldicellulosiruplor owensensis, Desulfobulbus sp. DSM 2033, Desulfobulbus sp. DSM 2058, Caldicellulosiruplor saccharolylicus, Caldicellulosiruplor Desulfobulbus sp. LB2, Desulfobulbus sp. ‘McCal 25 m’ saccharolylicus DSM 8903, Caldicellulosiruplor sp. Rt69B. Desulfobulbus sp. oral clone CH031, Desulfobulbus sp. oral 1, Caldicellulosiruplor sp. Rt 8B.4, Caldicellulosiruplor sp. clone R004, Desulfobulbus sp. RPf35L17, Desulfocapsa sp. Tok7B.1, Caldicellulosiruplor sp. Yl5, Candidalus Cantu Cad626, Desulfocapsa sp. La4.1, Desulfocapsa sulfexigens, bernalis alkalacelicum, Carboxydocellaferrireducens, Car Desulfocapsa Zhiozymogenes, Desulfocella halophila, Des boxydocella sp. 1244, Carboxydocella sp. 1503, Carboxydo ulfocella sp. DSM 2056, Desulfococcus biaculus, Desulfo cella sp. 930, Carboxydocella sp. 961, Carboxydocella coccus mullivorans, Desulfococcus niacini, Desulfococcus sporoproducens, Carboxydocella Zhermaulolrophica, oleovorans, Desulfococcus oleovorans Hxd3, Desulfococcus Delhiosulfovibrio acidaminovorans, Delhiosulfovibrio mari sp. DSM 8541, Desulfofaba faslidiosa, Desulfofaba gelida, nus, Delhiosulfovibrio peplidovorans, Delhiosulfovibrio Desulfofaba hansenii, Desulfofrigus ?agile, Desulfo?’igus peplidovorans DSM 11002, Delhiosulfovibrio russensis, oceanense, Desulfofrigus sp. HRS-La3x, Desulfofrigus sp. Pelospora glularica, Synlrophomonadaceae bacterium J 152, Desulfo?’igus sp. NA201, Desulfofrigus sp. NB81, CDA4, Synlrophomonadaceae genomosp. P1, Synlrophomo Desulfofuslis glycolicus, Desulfonema ishimolonii, Des nas cellicola, Synlrophomonas curvala, Synlrophomonas ulfonema limicola, Desulfonema magnum, Desulfopila aes erecla, Synlrophomonas erecla subsp. sporosynlropha, Syn Zuarii, Desulforegula conservalrix, Desulforhopalus sin Zrophomonaspalmilalica, Synlrophomonas sapovorans, Syn gaporensis, Desulforhopalus sp. LSv20, Desulforhopalus Zrophomonas sp. MGB-Cl, Synlrophomonas sp. TB-6, Syn vacuolalus, Desulfosalina propionicus, Desulfosarcina sp. Zrophomonas sporosynlrophas, Synlrophomonas wolfei, CMEl , Desulfosarcina variabil is, Desulfospira joergenseni i, Synlrophomonas wolfei subsp. melhylbulyralica, Synlroph Desulfolalea arclica, Desulfolalea psychrophila, Desulfo omonas wolfei subsp. saponavida, Synlrophomonas wolfei Zalea psychrophila LSv54, Desulfolalea sp. NA22, Desulfo subsp. wolfei, Synlrophomonas wolfei subsp. wolfei str. Gael Zalea sp. SFA4, Desulfolignum ballicum, Desulfolignum Zingen, Synlrophomonas Zehnderi, Synlrophosphora bryanlii, phosphiloxidans, Desulfolignum sp. DSM 7120, and Des Synlropholhermus lipocalidus, Thermaerobacler liloralis, ulfolignum Z0lu0lica. Thermaerobacler marianensis, Thermaerobacler nagasak [0068] The consortiums may include microorganism from iensis, Thermaerobacler sp. C4-1, Thermaerobacler sp. the family Closlridia, at least some of Which may participate enrichment clone A20, Thermaerobacler sp. enrichment in the conversion of complex hydrocarbon substrates to clone A7, Thermaerobacler sublerraneus, Therma US 2012/0021495 A1 Jan. 26, 2012

naer0vibri0 acidaminovorans, Thermanaerovibrio velox, clone B5091, Eubacterium sp. oral clone BU014, Eubacte Thermosyntropha lipolytica, and/or Thermovirga lienii. rium sp. oral clone BU061, Eubacterium sp. oral clone [0071] These Clostridia consortiums may include one or CK047, Eubacterium sp. oral clone DA014, Eubacterium sp. more genera of acetobacterium microorganisms such as oral clone DN050, Eubacterium sp. oral clone D0008, Eubac Acetobacterium bakii, Acetobacterium carbinolicum, Aceto terium sp. oral clone D0016, Eubacterium sp. oral clone bacterium carbinolicum subsp. kysingense, Acetobacterium DZ073, Eubacterium sp. oral clone EH006, Eubacterium sp. dehalogenans, Acetobacterium ?metarium, Acetobacterium oral clone E1074, Eubacterium sp. oral clone EWO49, malicum, Acetobacteriumpaludosum, Acetobacteriumpsam Eubacterium sp. oral clone EWO53, Eubacterium sp. oral molithicum, Acetobacterium sp. Ha4, Acetobacterium sp. clone FX028, Eubacterium sp. oral clone FX033, Eubacte HAAP-l, Acetobacterium sp. LS1, Acetobacterium sp. LS2, rium sp. oral clone Gl038, Eubacterium sp. oral clone Acetobacterium sp. Schreyahn_Kolonie_Aster 3.2, Aceto HUO29, Eubacterium sp. oral clone 1R009, Eubacterium sp. bacterium sp. TM20-2, Acetobacterium submarinus, Aceto oral clone 1H012, Eubacterium sp. oral clone 11012, Eubac bacterium tundrae, Acetobacterium wieringae, Acetobacte terium sp. oral clone 1N088, Eubacterium sp. oral clone rium woodii, Alkalibacter saccharofermentans, Alkalibacter 15001, Eubacterium sp. oral clone OH3A, Eubacterium sp. sp. TC3, Anaerofustis stercorihominis, Anaerofustis stercori oral strain A03MT, Eubacterium sp. oral strain A35MT, hominis DSM 17244, Anaerovorax odorimutans, Eubacteri Eubacterium sp. Pei061, Eubacterium sp. PG-04, Eubacte aceae bacterium BL-152, Eubacteriaceae bacterium P4Pi rium sp. 5G121, Eubacterium sp. 5G1213, Eubacterium sp. 50 P4, Eubacteriaceae bacterium WK012, Eubacteriaceae 5G1215, Eubacterium sp. 5G122, Eubacterium sp. 5G123, bacterium WN037, Eubacteriaceae oral clone MCE10i174, Eubacterium sp. TW2, Eubacterium sulci, Eubacterium tar Eubacteriaceae oral clone P2PBi46 P3, Eubacteriaceae antellae, Eubacterium tenue, Eubacterium thermomarinus, oral clone P2PCi29 P2, Eubacterium acidaminophilum, Eubacterium uniforme, Eubacterium ventriosum, Eubacte Eubacterium aggregans, Eubacterium albensis, Eubacterium rium ventriosum ATCC 27560, Eubacterium xylanophilum, angustum, Eubacterium barkeri, Eubacterium brachy, Eubacterium yurii, Eubacterium yurii subsp. margaretiae, Eubacterium budayi, Eubacterium callanderi, Eubacterium Eubacterium yurii subsp. schtitka, Eubacterium yurii subsp. cellulosolvens, Eubacterium cf. saburreum oral strain yurii, Mogibacterium diversum, Mogibacterium neglectum, C27KA, Eubacterium combesii, Eubacterium c0nt0rtum, Mogibacterium pumilum, Mogibacterium sp. oral clone BPl - Eubacterium coprostanoligenes, Eubacterium desmolans, 36, Mogibacterium sp. oral clone BP1-95,M0gibacterium sp. Eubacterium eligens, Eubacterium?ssicatena, Eubacterium oral clone BP1-96, Mogibacterium timidum, Mogibacterium hallii, Eubacterium hallii DSM 3353, Eubacterium in?rmum, vescum, Pseudoramibacter alactolyticus, and/or Pseudo Eubacterium limosum, Eubacterium minutum, Eubacterium ramibacter sp. oral clone BP1-8. moniliforme, Eubacterium multiforme, Eubacterium nitrito [0072] These Clostridia consortiums may include one or genes, Eubacterium nodatum, Eubacterium oxidoreducens, more genera of fusibacter microorganisms such as Acet Eubacterium pectinii, Eubacterium plautii, Eubacterium anaerobacter sp. lso-W4, Anaerococcus hydrogenalis, plautii ATCC 29863, Eubacterium plexicaudatum, Eubacte Anaerococcus lactolyticus, Anaerococcus murdochii, rium pyruvativorans, Eubacterium ramulus, Eubacterium Anaerococcus Octavius, Anaerococcus prevotii, Anaerococ rectale, Eubacterium ruminantium, Eubacterium saburreum cus sp. BGl, Anaerococcus sp. BG2, Anaerococcus sp. like sp. oral clone CK004, Eubacterium saphenum, Eubacte gpac028, Anaerococcus sp. gpac047, Anaerococcus sp. rium siraeum, Eubacterium siraeum DSM 15702, Eubacte gpac104, Anaerococcus sp. gpac126, Anaerococcus sp. rium sp., Eubacterium sp. 1275b, Eubacterium sp. 4c, gpac137, Anaerococcus sp. gpac155, Anaerococcus sp. Eubacterium sp. A-44, Eubacterium sp. ADS17, Eubacte gpac165, Anaerococcus sp. gpac199, Anaerococcus sp. rium sp. ARC-2, Eubacterium sp. BBDP17, Eubacterium sp. gpac215, Anaerococcus tetradius, andAnaerococcus vagina BBDP67, Eubacterium sp. BBDP70, Eubacterium sp. BL13, lis, Filifactor alocis, Filifactor sp. oral clone BP1-37, Filifac Eubacterium sp. BL22, Eubacterium sp. BL38, Eubacterium tor sp. oral clone BP1-51, Filifactor sp. oral clone BP1-54, sp. C124b, Eubacterium sp. C12b, Eubacterium sp. C2, Filifactor sp. oral clone BP1-58, Filifactor sp. oral clone Eubacterium sp. CB4, Eubacterium sp. C170, Eubacterium BP1-67, Filifactor sp. oral clone BP1-81, Filifactor sp. oral sp. cL-10-1-3, Eubacterium sp. cp03.14, Eubacterium sp. clone BP1-88, Filifactor villosus, Finegoldia magna, Fine CS1 Van, Eubacterium sp. cTPY-18, Eubacterium sp. F1, goldia magna ATCC 29328, Fusibacter paucivorans, Fusi Eubacterium sp. KE2-08, Eubacterium sp. L2-7, Eubacte bacter sp. SAl , Gallicola barnesae, Helcococcus kunzii, Hel rium sp. oral clone 3RH-1, Eubacterium sp. oral clone cococcus ovis, Helcococcus pyogenes, Helcococcus sp. BB142, Eubacterium sp. oral clone BE088, Eubacterium sp. DRBC0899CHER3, Helcococcus sueciensis, Peptoniphilus oral clone BP1-11,Eubacterium sp. oral clone BP1-2,Eubac asaccharolyticus, Peptoniphilus gorbachii, Peptoniphilus terium sp. oral clone BP1-20, Eubacterium sp. oral clone harei, Peptoniphilus indolicus, Peptoniphilus ivorii, Pep BP1-24,Eubacterium sp. oral clone BP1-26,Eubacterium sp. toniphilus lacrimalis, Peptoniphilus olsenii, Peptoniphilus oral clone BP1-27, Eubacterium sp. oral clone BP1-3,Eubac sp. 2002-2300004, Peptoniphilus sp. 2002-38328, Pep terium sp. oral clone BP1-31, Eubacterium sp. oral clone toniphilus sp. BG3, Peptoniphilus sp. BG4, Peptoniphilus sp. BP1-32,Eubacterium sp. oral clone BP1-34,Eubacterium sp. BG5, Peptoniphilus sp. gpac003, Peptoniphilus sp. gpac007, oral clone BP1-41, Eubacterium sp. oral clone BP1-47, Peptoniphilus sp. gpac018A, Peptoniphilus sp. gpac018B, Eubacterium sp. oral clone BP1-57, Eubacterium sp. oral Peptoniphilus sp. gpac055, Peptoniphilus sp. gpac063, Pep clone BP1-61, Eubacterium sp. oral clone BP1-62, Eubacte toniphilus sp. gpac077, Peptoniphilus sp. gpac121, Pep rium sp. oral clone BP1-69, Eubacterium sp. oral clone BPl - toniphilus sp. gpac148, Peptostreptococcaceae bacterium 75, Eubacterium sp. oral clone BP1-77, Eubacterium sp. oral 19gly3, Peptostreptococcaceae bacterium STV110602, Pep clone BP1-82, Eubacterium sp. oral clone BP1-89, Eubacte tostreptococcaceae bacterium WN036, Peptostreptococ rium sp. oral clone BP1-93, Eubacterium sp. oral clone BP2 caceae bacterium WN082, Peptostreptococcus anaerobius, 88, Eubacterium sp. oral clone BR088, Eubacterium sp. oral Peptostreptococcus genosp. 4, Peptostreptococcus micros, US 2012/0021495 A1 Jan. 26, 2012

Peploslreplococcus micros ATCC 33270, Peploslreplococ rated by this reference for all purposes. The consortia mem cus sp., Peploslreplococcus sp. 1018, Peploslreplococcus sp. bers may also be identi?ed 206, either before or after they are 2002-69396, Peploslreplococcus sp. C27, Peploslreplococ isolated. Identi?cation techniques may include identi?cation cus sp. CCUG 42997, Peploslreplococcus sp. cp10.23, Pep of signature proteins, and/or nucleic acid sequences that iden Zoslreplococcus sp. D1, Peploslreplococcus sp. E3i32, Pep tify the presence of the microorganism. Zoslreplococcus sp. MDA2346-2, Peploslreplococcus sp. oral [0074] The method may also include combining members clone A1062, Peploslreplococcus sp. oral clone AP24, Pep and/or subsets of the native consortia to form a neW consortia Zoslreplococcus sp. oral clone BP1-1, Peploslreplococcus sp. 208. Genetically modi?ed microorganisms not found in any oral clone BP1-18, Peploslreplococcus sp. oral clone BP1-22, native consortia may also be introduced. Characteristic of the Peploslreplococcus sp. oral clone BP1-50, Peploslreplococ neW consortia may be measured 21 0, such as the consumption cus sp. oral clone BP1-59, Peploslreplococcus sp. oral clone rate of carbonaceous material and/or the production rate of BP1-72, Peploslreplococcus sp. oral clone BP1-73, Pep metabolite (e. g., methane). Measured characteristics may Zoslreplococcus sp. oral clone BP1-84, Peploslreplococcus also involve the response of the neW consortia to amendments sp. oral clone BSO44, Peploslreplococcus sp. oral clone made to the consortia’s environments, such as changes in CK035, Peploslreplococcus sp. oral clone EX153, Pep temperature, pH, oxidation potential (Eh), nutrient concen Zoslreplococcus sp. oral clone FG014, Peploslreplococcus sp. trations, salinity, metal ion concentrations, etc. oral clone F1023, Peploslreplococcus sp. oral clone FL008, Peploslreplococcus sp. oral clone HE064, Peploslreplococ [0075] From the information gleaned from these and other cus sp. oral clone P4PA 156 P4, Peploslreplococcus sp. P4P studies, consortia may be produced With enhanced rates of 31P3, Peploslreplococcus sp. S1, Peploslreplococcus stoma metabolic activity for in situ conversions of carbonaceous Zis, Sedimenlibacler hongkongensis, Sedimenlibacler materials in sub-surface formations to hydrocarbons With hydroxybenzoicus, Sedimenlibacler saalensis, Sedimenli higher mol. % hydrogen. These consortia may be formed by bacler sp. B4, Sedimenlibacler sp. BAFl, Sedimenlibacler isolating and combining individual consortia (i.e., subsets of sp. BD7-4, Sedimenlibacler sp. BRS2, Sedimenlibacler sp. the consortia) or even individual microbial species. They may C7, Sedimenlibacler sp. D7, Sedimenlibacler sp. enrichment also be formed by amending one or more conditions in the clone 2Ben5, Sedimenlibacler sp. enrichment clone Lace6, consortia environment that favor the groWth of one species or Sedimenlibacler sp. enrichment clone Lace8, Sedimenli consortium over another. These amendments may include the bacler sp. IMPC3, Sedimenlibacler sp. .IN18 A14H, Sedi introduction of a groWth inhibitor that sloWs or stops the menlibacler sp. .IN18_V27_I, Sporanaerobacler aceligenes, groWth of one or more microbial species, and the introduction ?ssierella crealinini, ?ssierella crealinophila, ?ssierella of a groWth stimulant that increases the groWth rate of one or praeacula, and/or Hssierella sp. more microbial species. [0073] FIG. 2 shoWs a ?owchart With method steps for making and measuring the characteristics of a consortia. In EXPERIMENTAL the embodiment shoWn, the method starts With extracting native consortia from a formation site 202. The consortia may [0076] Measurements Were conducted to compare the per be taken from solid substrate at the site and/or formation centage of Desulfuromonas, Fusibacler, andAceZobacZerium Water stored in the site. Subsets and/or individual members in a microorganism consortium With the methano genesis rate may be isolated from the extracted consortia 204. Isolation for that consortium. The % Desulfuromonas % Fusibacler, % techniques may include any known in the art as Well as those Acelobaclerium and methanogenesis rate Were measured for described in US. patent application entitled “Systems and 12 microorganism consortiums. Table I beloW provides addi methods for the isolation of microorganisms in hydrocarbon tional information about the consortiums, their methanogen deposits” by Gary VanZin ?led on the same day as the instant esis rates, and the % Desulfuromonas, % Fusibacler, and % application, the entire contents of Which are hereby incorpo Acelobaclerium in the consortiums:

TABLE I Comparison ofMicroorganisrn Population Percentages With Methanogenesis Rate

% cosortium Methanogenesis % cosortium comprised % cosortium Consortium rate (mmoles comprised of of comprised of name Source material CH4/g coal/day) Desulfuromonas F usibacler Acelobaclerium

TRP64ME001 41M-2083 coal and 1.24 2.70 2.70 64.86 Water TRP64ME002 23C-2483 coal and 1.37 4.76 2.38 76.19 Water TRP64ME006 41M-2083 coal 3.59 33.33 12.82 46.15 23M-2283 Water TRP64ME007 23M-2283 coal and 3.096 29.73 27.03 37.84 Water TRP64ME008 23C-2483 coal and 3.929 16.67 16.67 50.00 Water TRP64ME009 23C-2483 coal and 1.831 9.52 9.52 71.43 Water TRP64ME010 23M-2283 coal and 4.301 14.66 17.07 60.98 Water US 2012/0021495 A1 Jan. 26, 2012 13

TABLE l-continued

Comparison of Microorganism Population Percentages with Methanogenesis Rate

% cosortium Methano genesis % cosortium comprised % cosortium Consortium rate (mmoles comprised of of comprised of name Source material CH4/g coal/day) Desulfuromonas Fusibacler Acelobaclerium

TRP64ME012 32D1-2183 coal 1.212 11.54 3.85 67.31 and water TRP64ME013 32D1-2183 coal 1.276 13.89 5.56 58.33 and water TRP64ME014 41M-2083 coal and 1.202 6.98 9.30 65.12 water TRP64ME015 41M-2083 Coal 4.09 53.33 13.33 20.00 23 M-2283 Water TRP64ME016 41M-2083 Coal 3.803 18.18 13.64 59.09 23 M-2283 Water

Desulfuromonas Measurements and Results Fusibacler to have a similar correlation as Desulfuromonas in FIG. 3. This was con?rmed by a statistical analysis of the plot, [0077] The % Desulfuromonas was measured by sequenc ing 16s rDNA found in each consortium. 16s rDNA allows the which had a Student’s T-test p-value of 0.0064 (<0.05 is Desulfuromonas to be distinguished from other microorgan statistically signi?cant). Statistical analysis was performed isms in the consortium and quanti?ed as a percentage of the using JMP Statistical DiscoveryTM software. Thus, like Des total population of the microorganisms in the consortium. ulfuromonas, an increased % Fusibacler in a microorganism One uncertainty involved with this measurement technique is consortium correlates with statistically higher methanogen that 16s rDNA sequence is practically indistinguishable esis rates. between Desulfuromonas and another microorganism genus called Pelobacler. However, Desulfuromonas is considered Acelobaclerium Measurements and Results the more universal genera in both the lab and the ?eld, and Desulfuromonas is more likely to be found where carbon [0081] The identi?cation and concentration measurements aceous material is being digested through hydrocarbon for the Acelobaclerium, as well as the measurements of the metabolism. For both these reasons, it is believed that the 16s methanogenesis rate, were the same as used for the Desulfu rDNA measurements performed here mostly (if not exclu romonas. As the data shows in Table 1, Acelobaclerium is a sively) represent Desulfuromonas. large and important component of the highly methanogenic [0078] The rate of methanogenesis for each of the consor coal metabolizing consortiums. For the 12 consortiums listed tiums was measured by placing the consortium in slurry in Table 1, the dominant genus identi?ed was Acelobacle bottles and measuring the methane concentration in the head rium, which averaged 56% of the microorganisms in the space above the liquid as a function of time. Sealed anaerobic consortium: cultures were established in 13 ml vessels containing 0.6 grams of sterile anaerobic Tongue River coal and 2.5 ml of sterile anaerobic Tongue River formation water. These sterile Methano genesis Rate media bottles were inoculated with approximately 1><104 Value (micromoles CH4/g coal/day) % Acelobaclerium cells from currently growing cultures comprised of coal and water as noted in Table 1 as “source material”. Data used for Mean 2.5783333 56.441667 Std. Deviation 1.3189258 15.758276 methanogenesis rates were the maximum rate obtained Std. Error Mean 0.3807411 4.5490223 between days 21 and 33 of culture growth. Cultures were Upper 95% Mean 3.4163388 66.453997 monitored for methanogenesis for 93 days. Lower 95% Mean 1.7403278 46.429336 [0079] FIG. 3 is a plot of the methanogensis rate (umols of Population Size (N) 12 12 methane/ gram of coal/ day) as a function of the percentage of Desulfuromonas in a microorganism consortium. The plot [0082] The size of the Acelobaclerium populations in the shows an increased % Desulfuromonas correlates with statis most methanogenically active consortiums at least shows a tically higher methanogenesis rates for the consortium. This positive correlation between Acelobaclerium and methano was con?rmed by a statistical analysis of the plot, which had genesis rate. Thus, Acelobaclerium may be included in one or a Student’s T-test p-value of 0.0178 (<0.05 is statistically more consortiums identi?ed here for enhancing the methano signi?cant). Statistical analysis was performed using JMP genesis rate in a formation site. Statistical DiscoveryTM software. [0083] Having described several embodiments, it will be recognized by those of skill in the art that various modi?ca Fusibacler Measurements and Results tions, alternative constructions, and equivalents may be used [0080] The identi?cation and concentration measurements without departing from the spirit of the invention. Addition for the Fusibacler, as well as the measurements of the metha ally, a number of well known processes and elements have not nogenesis rate, were the same as used for the Desulfuromo been described in order to avoid unnecessarily obscuring the nas. FIG. 4 shows the methanogensis rate (umols of methane/ present invention. Accordingly, the above description should gram of coal/day) as a function of the percentage of not be taken as limiting the scope of the invention. US 2012/0021495 A1 Jan. 26, 2012

[0084] Where a range of values is provided, it is understood 8. The isolated microbial consortia of claim 1, Wherein the that each intervening value, to the tenth of the unit of the loWer doWnstream metabolic product comprises an organic acid, an limit unless the context clearly dictates otherwise, betWeen alcohol, an amine, a straight or branched hydrocarbon, or an the upper and loWer limits of that range is also speci?cally aromatic hydrocarbon. disclosed. Each smaller range betWeen any stated value or 9. The isolated microbial consortia of claim 1, Wherein the intervening value in a stated range and any other stated or doWnstream metabolic product comprises methane. intervening value in that stated range is encompassed. The 10. The isolated microbial consortia of claim 1, Wherein the upper and loWer limits of these smaller ranges may indepen starting hydrocarbon metabolic product comprises a formate dently be included or excluded in the range, and each range compound, an acetate compound, a benZoate compound, an Where either, neither or both limits are included in the smaller alcohol, or an organic acid. ranges is also encompassed Within the invention, subject to 11. The isolated microbial consortia of claim 5, Wherein the any speci?cally excluded limit in the stated range. Where the intermediate metabolic products comprise CO or CO2. stated range includes one or both of the limits, ranges exclud 12. An isolated microbial consortia for biogenic methane ing either or both of those included limits are also included. production, the consortia comprising: [0085] As used herein and in the appended claims, the a ?rst microbial consortium that converts a starting hydro singular forms “a”, “an”, and “the” include plural referents carbon into one or more intermediate compounds; unless the context clearly dictates otherWise. Thus, for a second microbial consortium that converts at least one example, reference to “a process” includes a plurality of such type of the intermediate compounds into CO2 and H2; processes and reference to “the electrode” includes reference and to one or more electrodes and equivalents thereof knoWn to a third microbial consortium that converts the CO2 and H2 those skilled in the art, and so forth. into methane and Water, [0086] Also, the Words “comprise,” “comprising,” Wherein at least one of the ?rst, second and third microbial “include,” “including,” and “includes” When used in this consortiums comprises at least one species of Desulfu speci?cation and in the folloWing claims are intended to romonas. specify the presence of stated features, integers, components, 13. The microorganism consortia of claim 12, Wherein the or steps, but they do not preclude the presence or addition of starting hydrocarbon comprises coal, oil, kerogen, peat, lig one or more other features, integers, components, steps, acts, nite, oil shale, tar sands, bitumen, or tar, and Wherein the or groups. intermediate compound comprises a formate compound, an acetate compound, a benZoate compound, an alcohol, or an organic acid. What is claimed is: 14. The microorganism consortia of claim 12, Wherein the 1. An isolated microbial consortia comprising: ?rst microbial consortium comprises a species of Desulfu a ?rst-bite microbial consortium that converts a starting romonas. hydrocarbon comprising a complex hydrocarbon into 15. The microorganism consortia of claim 12, Wherein the tWo or more ?rst-bite metabolic products; and second microbial consortium comprises a species of Desulfu a doWnstream microbial consortium that converts a starting romonas. hydrocarbon metabolic product into a doWnstream 16. The microorganism consortia of claim 12, Wherein the metabolic product, Wherein the doWnstream metabolic third microbial consortium comprises a species of Desulfu product has a greater mol. % hydrogen than the starting romonas. hydrocarbon, and Wherein the ?rst-bite microbial con 17. The microorganism consortia of claim 12, Wherein the sortium or the doWnstream microbial consortium com ?rst, second and third consortiums consist of anaerobic prises one or more species of Desulfuromonas. microorganisms. 2. The isolated microbial consortia of claim 1, Wherein 18. An isolated microbial consortia for biogenic methane both the ?rst-bite microbial consortium and the doWnstream production, the consortia comprising: microbial consortium are anaerobic microbial consortiums. a ?rst microbial consortium that converts a starting hydro 3. The isolated microbial consortia of claim 1, Wherein at carbon into one or more intermediate compounds; least one of the ?rst-bite metabolic products is the starting a second microbial consortium that converts at least one hydrocarbon metabolic product. type of the intermediate compounds into acetate; and 4. The isolated microbial consortia of claim 1, Wherein the a third microbial consortium that converts the acetate into consortia further comprises an intermediate microbial con methane and Water, sortium that converts the ?rst-bite metabolic product into the Wherein at least one of the ?rst, second and third microbial starting hydrocarbon metabolic product. consortiums comprises at least one species of Desulfu 5. The isolated microbial consortia of claim 4, Wherein the romonas. intermediate microbial consortium comprises a plurality of 19. The microbial consortia of claim 18, Wherein the third microorganism species that converts the ?rst-bite metabolic microbial consortium comprises a ?rst group of microorgan product into the starting hydrocarbon metabolic product isms that convert acetate into carbon dioxide and free hydro through a plurality of intermediate metabolic products. gen, and a second group of microorganisms that convert the 6. The isolated microbial consortia of claim 5, Wherein at carbon dioxide and free hydrogen into methane and Water. least one of the plurality of microorganism species is a species 20. The microbial consortia of claim 19, Wherein the third of Desulfuromonas. microbial consortia comprises a species of Desulfuromonas. 7. The isolated microbial consortia of claim 1, Wherein the 21. The microorganism consortia of claim 18, Wherein the starting hydrocarbon comprises coal, oil, kerogen, peat, lig ?rst, second and third consortiums consist of anaerobic nite, oil shale, tar sands, bitumen, or tar. microorganisms. US 2012/0021495 A1 Jan. 26, 2012 15

22. An isolated microbial consortia comprising: 23. An isolated microbial consortia comprising: a ?rst-bite microbial consortium that converts a starting a ?rst-bite microbial consortium that converts a starting hydrocarbon comprising a complex hydrocarbon into hydrocarbon comprising a complex hydrocarbon into tWo or more ?rst-bite metabolic products; and tWo or more ?rst-bite metabolic products; and a doWnstream microbial consortium that converts a starting a doWnstream microbial consortium that converts a starting hydrocarbon metabolic product into a doWnstream hydrocarbon metabolic product into a doWnstream metabolic product, Wherein the doWnstream metabolic metabolic product, Wherein the doWnstream metabolic product has a greater mol. % hydrogen than the starting hydrocarbon, and Wherein the ?rst-bite microbial con product has a greater mol. % hydrogen than the starting sortium or the doWnstream microbial consortium com hydrocarbon, and Wherein the ?rst-bite microbial con prises one or more species of Acelobaclerium. sortium or the doWnstream microbial consortium com prises one or more species of Fusibacler. * * * * *