Record Display for the EPA National Library Catalog


Main Title Aerobic stabilization of waste activated sludge : an experimental investigation /
Author Cohen, David B.,
Other Authors
Author Title of a Work
Fullerton, Donald G.
Publisher Municipal Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,
Year Published 1975
Report Number EPA-600/2-75-035; EPA-68-03-0152; EPA-ROAP-21ASD-17
Stock Number PB-246 593
OCLC Number 01979422
Subjects Sewage disposal plants--Pilot plants ; Sewage--Purification--Activated sludge process
Additional Subjects Sewage treatment ; Activated sludge process ; Aerobic processes ; Sludge digestion ; Biochemical oxygen demand ; Metabolism ; Design criteria ; Biomass ; Oxygenation ; Dissolved gases ; Performance evaluation ; Cost analysis ; Colorado ; Aeration ; Suspended solids ; Denver(Colorado)
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD  EPA 600-2-75-035 Headquarters Library/Washington,DC 05/14/2013
EKBD  EPA-600/2-75-035 Research Triangle Park Library/RTP, NC 06/13/2003
ELBD ARCHIVE EPA 600-2-75-035 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
EMBD  EPA/600/2-75/035 NRMRL/GWERD Library/Ada,OK 02/03/1995
ESAD  EPA 600-2-75-035 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-246 593 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation xii, 175 pages : illustrations ; 27 cm
Metro Denver Sewage Disposal District No. 1 (Metro) in 1970 converted excess secondary aerators to aerobic digesters. The plant scale diffused air system was compared with a pilot scale open tank oxygen system using very fine bubble fixed and rotating diffusers. For the air system volatile suspended solids (VSS) reductions ranged between 11.2% and 47.2%. A significant correlation was observed between VSS reduction and detention time-temperature factor. Cold shock eliminated nitrification for a five month period. When invertebrates, particularly rotifers, comprised a significant fraction of the biomass, digestion was maximal. The pollutant concentration in the supernatant from the aerobic digester averaged 10% of that from an anaerobic digester. For the oxygen batch tests, biodegradable VSS digestion rate coefficient k averaged 0.27. No correlation was observed between DO concentration and VSS reduction rates. The temperature of the oxygen digested biomass increased with increased loadings.
Report prepared by Metropolitan Denver Sewage Disposal District No. 1, Commerce City, Colorado, and F.M.C. Corporation - MAROX Systems, Englewood, Colorado, under Contract no. 68-03-0152. Includes bibliographical references (pages 172-173).