Record Display for the EPA National Library Catalog
RECORD NUMBER: 303 OF 728Main Title | Full-scale demonstration of industrial wastewater treatment utilizing Du Pont's PACT process (November, 1976, through December, 1979) / | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Author | Heath, Harry W. | ||||||||||||||||
CORP Author | Du Pont de Nemours (E.I.) and Co., Deepwater, NJ. Chambers Works.;Robert S. Kerr Environmental Research Lab., Ada, OK. | ||||||||||||||||
Publisher | U.S. Environmental Protection Agency, Robert S. Kerr Environmental Research Laboratory ; National Technical Information Service, | ||||||||||||||||
Year Published | 1981 | ||||||||||||||||
Report Number | EPA 600/2-81/159; EPA-S-804943 | ||||||||||||||||
Stock Number | PB81-248122 | ||||||||||||||||
OCLC Number | 09572971 | ||||||||||||||||
Subjects | Sewage--Purification--Biological treatment ; Sewage--Purification--Activated sludge process | ||||||||||||||||
Additional Subjects | Water pollution control ; Chemical industry ; Industrial waste treatment ; Activated carbon treatment ; Operating costs ; Cost analysis ; Performance evaluation ; Activated sludge treatment ; Du Pont's PACT process | ||||||||||||||||
Holdings |
|
||||||||||||||||
Collation | viii, 155 pages : illustrations ; 28 cm | ||||||||||||||||
Abstract | Operating and cost data on startup and the initial 30 months of operation of a 150,000 cu m/day (40-MGD) industrial wastewater treatment plant using Du Pont's PACT process are reported. The process effectively provides secondary/tertiary treatment by adding powdered activated carbon to the aerator in an activated sludge process. Removals of BOD5 and color were 96% and 68%, respectively, exceeding expectations. Removal of Dissolved Organic Carbon (DOC) was 82%, approximately equal design. Removals were consistent even though the waste contained many relatively toxic, non-biodegradable organics and varied drastically in composition. A synergistic enhancement of biological activity in the presence of activated carbon was observed. Operation at over 25 days sludge age reduced the required carbon dose from more than 170 mg/liter to 120 mg/liter. Activated carbon was regenerated in a multiple-hearth furnace. At 80% yield with recovery of 63% of virgin carbon properties, production rate and quality recovery were below expectations. Performance was hurt by underdesigned filtration and solids conveying equipment which limited throughput and in-time. Excluding depreciation, operating costs for secondary/tertiary treatment alone have averaged $0.16/cu m ($0.61/1,000 gal.). Including depreciation, costs have averaged $0.33/cu m ($1.27/1,000 gal.). |
||||||||||||||||
Notes | Grant no. S-804943. "PB81-248122." "September 1981." "EPA-600/2-81-159." Includes bibliographical references. |