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water to facultative treatment pond. Flow based on 5 gal rinse/animal X 500 animals/day= 2,500 gallons/day. 2. Scalding water, rinse after scalding and kill floor water will flow directly to a screened, 2,000 gallon grease trap. From the grease trap, the water will be pumped to the facultative treatment pond. Animal liquids (excluding blood) such as urine in bladders, etc. and trapped grease will be retained for inedible rendering. 3. Septic treatment from employees/office restrooms will consist of one-1,600 gallon septic tank with 8,000 sq ft leachfield area (Includes 100% replacement area). B. QUANTITY OF SLAUGHTERHOUSE WASTEWATER PER DAY ANIMAL QUANTITY/DAY AMOUNT/ANIMAL(GALLONS) AVERAGE GALLONS TOTAL GALLONS BOARS 4 45-50 50 200 SOWS 4 45-50 50 200 MARKET 300 25-35 30 9000 _ SHEEP 40 25-35 30 1200 GOATS 30 25-35 30 900 CALFS 100 25-35 30 3000 TOTALS 14,500 GALS/DAY 72,500 GALS/WK 30 GPM(AVG) Water use reduction devices and procedures will be implemented including improved low flow spray nozzles at carcass showers, viscera handling areas and low flow sinks and toilets in the employee/office restrooms. C. AEROBIC-ANAEROBIC (FACULTATIVE) TREATMENT POND The facultative pond will be lined with 30 mil high density polyethylene (HDPE) plastic. The stabilization of wastewater will be brought about by a combination of aerobic, anaerobic and _ facultative bacteria in their respective zones. The surface zone will contain aerobic bacteria and algae which exist in a symbiotic relationship. The anaerobic bottom zone is where accumulated solids are decomposed by anaerobic bacteria and the intermediate zone is where facultative bacteria decompose organic wastes. As the wastewater from the slaughterhouse enters the pond, remaining suspended solids will fall out by sedimentation to form the anaerobic sludge layer. Soluble and colloidal organic materials are oxidized by aerobic and facultative bacteria using oxygen produced by algae growing near the surface. In addition, windy conditions promote mixing and reaeration. Carbon dioxide produced from organic oxidation serves as a carbon source for the algae. Because algae use CO2 in photosynthesis, high pH conditions should result. An alkaline pH forces the nitrogen in solution to remain in the ammonia form and not ammonium, which is the precursor to nitrate. 3 Valley Mfg Ppearch