Membrane Systems for Waste Minimization Waste Minimization and Resource Recovery
ANUFACTURERS are continuously struggling to meet the increasing demand for competitively priced world class products while at the same time striving to meet increasingly strict governmental regulations requiring the reduction or elimination of industrial wastes — preferably through source reduction. Sanborn Technologies continues to develop and deploy state-of-the-art separation solutions to assist manufacturers to produce higher quality products Mand meet environmental mandates.
SANBORN TECHNOLOGIES mechanical and operates without MEMBRANE SYSTEMS messy and expensive prefiltration. In For wastewaters containing oily emul- most cases ultrafiltration can produce sions or very fine suspended solids, sewerable effluent, thus dramatically FEATURES membrane techology has proven to be reducing waste disposal costs. the most reliable treatment solution. Primary Applications include: A high-tech polymeric Sanborn’s membrane systems offer a membrane is insensitive to straightforward approach to separating Aqueous Parts Washer Solutions chemical and concentration wastewaters which in the past Metalworking Coolants changes in the waste feed required extensive physical / chemical Vibratory, Burnishing, and stream. treatment. Membranes are the pre- Deburring Wastes Half-inch tubular membranes PREVENTION ferred solution for protecting the Mop Water allow processing of high- environment because they provide a Food Processing Wastes solids waste. (UF only) positive physical barrier between Air Compressor Blowdown System operates in batch or wastewater and discharge, use less continuous mode. Printing Press Washwater energy, and eliminate airborne pollu- Self-contained and skid- tion caused by evaporators. NANOFILTRATION (NF) mounted units install easily. HOW MEMBRANE Nanofiltration uses a tighter mem- SEPARATIONS ARE brane than ultrafiltration and offers a ACCOMPLISHED higher quality water output. Operat- BENEFITS Membrane separations work by using ing at pressures between 100-200 psi, a very tight membrane filter which NF is considered a cross between UF DIRECT COST SAVINGS separates smaller molecules, such as and RO. Available in narrow channel Reduced waste volume water, from larger molecules, such as configurations, NF is used in low saves on disposal costs. an oil emulsion. Depending upon the solids applications, or in conjunction Simple operation saves on characteristics of the waste stream and with significant prefiltration. See the labor costs. the desired objective, two classes of discussion of wide versus narrow Extremely low operating costs membranes — UF and NF — have channel configurations on page 2. give continued savings. evolved as Sanborn’s standard for waste minimization because they are OTHER CROSS FLOW MEMBRANE TECHNOLOGIES easy to use and reliable. MICROFILTRATION (MF) ENVIRONMENTAL BENEFITS CLASSIFICATIONS OF Microfiltration, a low pressure Positive membrane barrier SANBORN TECHNOLOGIES membrane system, separates particles ensures consistent effluent MEMBRANE SYSTEMS down to 0.1 micron. This technology quality. POLLUTION ULTRAFILTRATION (UF) is used for separations such as Lower waste volumes reduce Ultrafiltration membrane systems suspended solids removal, metal environmental liability. offer the widest range of flexibility in hydroxide clarification, and as a Low-pressure, non-chemical applications. These membranes biological wastewater clarifier. MF is system is safe to operate. separate particles down to 0.005 sensitive to oil fouling and is difficult micron and, when designed into a to use in the presence of free oil. tubular wide channel configuration, VALUABLE TIME SAVINGS can handle heavy solids from REVERSE OSMOSIS (RO) Unattended operation and operations like vibratory finishing. Reverse osmosis is a high pressure limited maintenance saves Ultrafiltration membrane systems are process that is used to separate water man-hours. chemically resistant and the preferred from dissolved salts and metals. It is method of waste minimization for the tightest of the membrane systems Less storage, monitoring, and breaking emulsions — reducing and offers competitive performance hauling away of wastewater wastes by as much as 98% without to ion exchange and carbon absorp- saves time. the use of chemical additives. The tion technologies. RO is sensitive to ultrafiltration separation process is oils and solids, and is a poor choice 1 for oily waste minimization. T O D A Y ’ S T E C H N O L O G Y APPLICATIONS FOR MEMBRANE SYSTEMS
Metalworking Coolants Removal of the water in emulsions achieving waste HOW UF MEMBRANE SYSTEMS WORK minimization UF membrane systems work by pumping wastewater across a semi- permeable membrane and driving the cleaned water (permeate) out of the membrane. The process is continuous, and because of the Aqueous Parts Washer Solutions cross-flow pattern and the large ½ inch internal diameter tubular Resource recovery of the washer solution for bath extension filter, the membrane does not cake or plug. No materials are trapped within the membrane; instead they are concentrated, and on a Vibratory, Burnishing, and Deburring Wastes periodic basis pumped from the process tank for disposal. Removal of the suspended solids in the rinse stream for resource recovery of the rinse water HOW MEMBRANE SYSTEMS WORK
5. WASTE MATERIAL Mop Water Removal of the water from the oily wash water for waste 1. FEED TUBULAR minimization ULTRAFILTRATION MEMBRANES Food Processing Wastes PROCESS CLEANING TANK TANK Removal of suspended solids, FOG, and reduction of BOD and COD for waste minimization 4. TO SEWER Air Compressor Blowdown 3. PUMP 6. PERIODIC Removal of condensate water from compressor blowdown WASTE DISPOSAL for disposal 2. Y-STRAINER Printing Press Washwaters Removal of the rinse waters from the printing inks for waste minimization MEMBRANE CONFIGURATIONS — WIDE AND NARROW CHANNEL Most membrane technology is available as both wide and narrow channel configurations. Each has their advantages:
WIDE CHANNEL configuration means that the inside dimensions NARROW CHANNEL membranes typically have dimensions inside of the membrane module are typically at least ½ inch. This allows the module of 1,250 microns. This tight packing of membrane allows the modules to be used in high solids applications. For example, smaller modules to be employed to achieve separations and reduces most manufacturing plants generate and process mop water that the capital equipment cost. Since the flow path is small, prefiltration has a high solids content. is necessary. Narrow channel devices are best applied in waste streams that do not contain solids.
NARROW CHANNEL SPIRAL WOUND ELEMENT
½" WIDE CHANNEL TUBULAR ELEMENT
CUTAWAY OF TUBING SHOWS WIDE CHANNEL TUBULAR MEMBRANES
2 Accessories Coalescer for Free-Oil Removal Improves Membrane Performance
The Sanborn Oil Separator (SOS) is designed for the efficient removal of free oils to less than 1% from wastewater. Two configurations are available with processing capabilities of 5 GPM (Gallons Per Minute) and 10 GPM. Shipped fully assembled, this compact separator is easily positioned, simple to install, and requires only plant air to operate. The Sanborn Oil Separator is extremely reliable and requires only an occasional prefilter clean-out for maintenance.
SOS-5 NF-1000 WITH INTEGRATED SOS AND TRANSFER PUMP
GENERAL SPECIFICATIONS
MODEL 5 GPM 10 GPM Length (in.) 60 60 Width (in.) 30 30 Height (in.) 36 48 Dry Weight (lbs.) 180 220 Hold-Up Volume 40 gal. 80 gal Air Required 1 SCFM 2 SCFM
OIL SEPARATOR OPERATION SYSTEM OPERATION 5 Disconnect 1. Contaminated fluid is continu- Oil Oil Outlet Fittings ously fed into the unit. 2. The fluid is processed through Bag 4 Discharge a bag filter, then flows into the Floating Filter 3 Skimmer Pump 2 Hose media chamber. Coalescer 3. Free oils are coalesced and Media Cart separated in the porous media bed. 4. Clarified fluid overflows the 1 Suction Hose discharge baffle and is discharged. OIL-FREE OUTLET 5. Separated free oils and other impurities are collected at the top of the separator and are discharged automatically by means of an oil weir.
23 Walpole Park South Walpole, MA 02081 USA Telephone 508-660-9150 Fax 508-660-9151 E-mail [email protected] All specifications in this brochure are subject to change without notice. www.sanborntechnologies.com Copyright 2002 by North American Filtration Inc. NEP-802-5M MFG PDFRev 03DEC04