7. Have appropriate environmental controls been applied? Sourcing and legality aspects Origin Where do the products come from? Information accuracy Is information about the products credible? Legality Have the products been legally produced? Environmental aspects Sustainability Have forests been sustainably managed? Unique forest values Have unique forest values been protected? Climate change Have climate issues been addressed? Environmental protection Have appropriate environmental controls been applied? Fresh and recycled fiber Have fresh and recycled fibers been used appropriately? Other resources Have other resources been used appropriately? Social aspects Local communities, indigenous peoples, and workers Have the needs of local communities, indigenous peoples, and workers been addressed? 2.86 10 things you should know I 7. Have appropriate environmental controls been applied? Have appropriate environmental 7. controls been applied? Different types of pollution can occur in many different the discharge points. The degree of deviation (i.e., lack of places along the supply chain for wood and paper-based compliance) from legally established emission thresholds products (Figures 10 and 11). The amount and intensity is also an important factor, and the opportunity for of emissions depend on the type, condition and capacity continuous improvement exists. of the equipment causing pollution, and the location of Figure 10. Examples of emissions in paper-based products Carbon dioxide emissions Atmosphere Paper-making Paper recycling Energy production Pulp mill Bleaching Paper production absorption Use (sequestration) Carbon dioxide Wood residue Engineered Wood wood plant Disposal residue Tree production Wood fuels Saw mill Structural wood Use Fossil fuels Electricity (may include fossil fuels) Paper manufacturing: processes and emissions Fiber production: separates Bleaching: eliminates remaining Paper-making: produces a Recycling: involves two major fibers from other compounds compounds from the pulp, continuous and uniform thread of steps: through mechanical and chemical increases brightness and increases paper. Process involves: • Re-pulping: separating fibers processes. absorbency. Fibers used for printing • Pulp is diluted in water and from other substances (i.e., dirt, and writing papers, tissue paper Mechanical: energy-intensive sprayed into a fast-moving, plastic, wax in specialty paper) or top of board papers undergo processes that apply physical continuous screen. and from each other. Sulfur, bleaching. pressure to convert wood into formaldehyde, naphthalene and • Water is drained by gravity and pulp. Result in high pulp yields; Bleaching substances that can be sodium compounds are used to pumps, and the pulp forms a fibers provide smooth printing used: facilitate the process. fiber mat. surface but they are not strong. • Chlorine-based compounds • De-inking: removing the ink • The fiber mat passes through Chemical processes: chemicals from the paper and from the • Sodium or calcium hypochlorite a series of rollers and cylinders dissolve other compounds to pulp mix by washing, flotation, as well as sodium hydroxide to extract water, compress and extract and bond fibers. Fibers are or a combination of both. reduce thickness and produce a more flexible and stronger than • Oxygen, ozone Chemicals used include sodium smooth surface. those from mechanical processes. • Hydrogen peroxide compounds, hydrogen peroxide, Emissions: chemicals are used to calcium chloride, soaps and fatty Emissions: mostly water-borne Emissions: potential pollutants create special properties (gloss, acids. emissions including sulfur released to the air and water color, water resistance, etc.) and to compounds, BOD, suspended Recovered fibers can also be include chlorinated organic and facilitate the paper-making process. solids, COD, AOX, and VOCs. bleached separately or during inorganic compounds, AOX, and Emissions include particulate waste, Most input chemicals (e.g., sulfur re-pulping. VOCs. organic and inorganic compounds, and sodium compounds) can be COD, and acetone. Emissions: mostly water-based, recovered for reuse. including printing inks, adhesive components, fats, resins and AOX. Examples of different emissions from different processes in paper-making. Dots representing energy do not quantify amount or proportion of energy inputs. Based on Holik, 2006; EPA, 2002; Paper Task Force, 1995. 2.87 10 things you should know I 7. Have appropriate environmental controls been applied? Figure 11. Example of emissions in solid wood products Carbon dioxide emissions Atmosphere Paper recycling Energy production Pulp mill Paper production absorption Use (sequestration) Carbon dioxide Wood residue Engineered wood plant Wood Disposal residue Structural wood Tree production Wood fuels Saw mill Drying Planing Use Fossil fuels Electricity (may include fossil fuels) Sources: Milota, et al., 2005. The study was for production of dimension lumber in the Western and Southern U.S. Dimensional lumber manufacturing: processes and emissions Sawing: log storage and breakdown of raw Drying: the removal of water and moist Planing: the removal of excess wood to logs into rough green lumber. content. Drying enhances performance, produce lumber with pre-determined minimizes changes in the dimension dimensions and relatively smooth surfaces Water is used to wet the logs when they are (contraction or expansion), improves using planers, conveyers and other sorted prior to being sawn. strength, reduces weight, facilitates equipment. processing and treatment, and reduces decay. Water-based chemicals such as paints, Plastic film, cardboard corners and steel anti-stain treatments and others are used, Because changes in water content result in strapping are used to package the product. although their volumes are not considered strain and stress, wood must be dried under Use of other materials such as paints (for highly toxic or hazardous. controlled circumstances to avoid bending, end sealing) is minor. crackling or twisting. Chemicals can be used Emissions: dust, VOC, Acetaldehyde, to treat lumber depending on the end- Emissions: coarse dust, VOCs, wood- Formaldehyde and methanol can be product, including fire retardants, paints and shavings and chips. emitted to the air. Solid emissions such finishes. as sawdust, bark, chips, and rough green lumber are considered co-products, and Emissions: common emissions include are often burned for energy production organic lubricants, solid particles, dust, and or sold/used for other industrial processes VOCs. Because of their volume, emissions such as paper-making. of inorganic compounds are not considered highly toxic or hazardous. Example of different emissions in the manufacturing of dimensional lumber. Dots representing energy do not quantify amount or proportion of energy inputs. Based on Milota et al., 2005. See box 11 for description of pollutants. 2.88 10 things you should know I 7. Have appropriate environmental controls been applied? Types of pollution include: More information on pollutants commonly associated with manufacturing of wood and paper-based products can be n Emissions to air found in Box 15. - Energy-related emissions resulting from the combustion of wood and fossil fuels to generate Bleaching can be a potentially major source of pollution power. (Box 16). Most of the global paper industry has phased out - Processing emissions resulting from processes the use of Elemental Chlorine (EC) as a bleaching agent; such as pulping, bleaching, pressing, evaporating, however, some facilities still use it. The prevailing bleaching and the chemical recovery systems. systems are Elemental Chlorine Free (ECF) and Enhanced n Solid emissions Elemental Chlorine Free (EECF). Totally Chlorine Free (TCF) - Sludge from wastewater treatment plants. bleaching may be an option for certain products, although - Ash from boilers. it tends to use more fiber and produce a lower quality - Miscellaneous solid waste, including wood, bark, product. non-recyclable paper, and rejects from recycling processes. The law is the formal reference for what constitutes an acceptable level of emissions in a country. No international n Emissions to water – large amounts of water are agreement on acceptable levels of emissions exists, but needed to carry the fibers through each manufacturing some multilateral and bilateral lending institutions have step in making paper products. established policies based on Environmental Impact n Noise – a concern in the immediate vicinity of a Assessments (EIA). mill. Its impact depends on the proximity of human settlements and the mitigation measures taken. Factors to consider regarding pollution • Engaging in dialogue with landowners, trade associations and NGOs can be useful as they are often familiar with specific issues and local circumstances. • The emission of pollutants is often specific to the country and the site. Some countries are more stringent in their regulation of emissions. Continuous improvement should be the goal; although compliance may not always be enough (e.g., in cases where requirements are not stringent) therefore holistic environmental impact reductions are also a goal. Adherence to the relevant and local regulations and/or international lending standards can be used as a proxy to assess a company’s procurement policy requirements. • Best management practices in the forest industry to deal with pollution include: - Minimizing the generation of effluents, air emissions and solid waste through