||Oxidation ditch treatment of meatpacking wastes /
Paulson, Wayne L. ;
Lively, Lawrence D.
||Morrell (John) and Co., Chicago, IL.;Industrial Environmental Research Lab.-Cincinnati, OH.
|| Environmental Protection Agency, Office of Research and Development, Industrial Environmental Research Laboratory ; For sale by the National Technical Information Service,
Packing-houses--Waste disposal--Iowa--Ottumwa. ;
Sewage--Purification--Activated sludge process. ;
Sewage sludge as feed. ;
Tratamento de aguas residuarias. ;
Packing-houses--Iowa--Ottumwa--Waste disposal ;
Tratamento de aguas residuarias--larpcal
Activated sludge process ;
Industrial waste treatment ;
Settling basins ;
Sludge disposal ;
Performance evaluation ;
Meat packing industry
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||xii, 111 pages : illustrations, map ; 28 cm.
The analysis of 18 months of early operation for a channel aeration activated sludge wastewater treatment plant is presented. The treatment plant receives an average flow of 2.8 million gallons per day from the John Morrell and Company, Ottumwa, Iowa hog and beef meatpacking plant. The treatment plant includes preaeration, primary settling and grease removal followed by two 3.5 million gallon aeration channels (40 by 6 feet deep by 1,050 feet in length) in parallel. Rotor and floating aerators are utilized. One channel utilizes an experimental straightline settling unit (16 by 475 by 6 feet deep). The design and operation of the primary treatment units was inadequate. Tubular conveyors for sludge removal were not satisfactory. More efficient grease and suspended solids removal is needed prior to the aeration process. The channel aeration activated sludge process is capable of achieving organic removals of 90 to 95 percent from meatpacking wastewater. High effluent ammonia levels are of concern. Various plant design changes are needed to improve the consistency of good effluent quality.
Grant no. 12060 EUB. Jan. 1979. Includes bibliographical references (page 74). Microfiche.