Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Biological concepts for design and operation of the activated sludge process /
Author Gaudy, Anthony F.
Other Authors
Author Title of a Work
Gaudy, Elizabeth T.
Publisher U.S. Government Printing Office,
Year Published 1972
Report Number W7212011; EPA17090-FQJ-09/71; EPA 620-R-71-011
OCLC Number 00496564
Subjects Sewage--Purification--Activated sludge process. ; Sewage--Purification--Mathematical models.
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 620-R-71-011 Headquarters Library/Washington,DC 04/11/2011
EJBD  EPA 620-R-71-011 Headquarters Library/Washington,DC 02/10/2014
EKAD  17090FQJ09/71 Region 4 Library/Atlanta,GA 08/30/2002
EKAD  TD756.G38 Region 4 Library/Atlanta,GA 08/30/2002
ELBD  EPA 17090-FQJ-09-71 AWBERC Library/Cincinnati,OH 11/04/2011
Collation xii, 154 pages : illustrations ; 28 cm.
Includes bibliographical references.
Contents Notes
Over the past decade, research has been conducted to produce a general body of conceptual principles applicable to design and operation of activated sludge processes. The aid of the report is to present these biological concepts in terms readily understood by engineering professionals. Generalized concepts of BOD exertion, the use of the measure of biologically available organic matter in a waste sample as a design and operational tool, the stoichiometry and mass balance concepts of treatment, and kinetic equations for microbial growth are presented. Design models are discussed, and a model for completely mixed reactors holding recycle solids, X(R), constant is recommended. Some guidelines for accommodation of various types of shock loadings are included. Concepts of oxidative assimilation and the multiple effects of solids concentration, nitrogen concentration, and detention time are related; a new activated sludge process (continuous oxidative assimilation) for nitrogen-deficient wastes is presented. Data supporting the concept of total oxidation are presented. Some possible flow diagrams for complete aerobic treatment (purification and sludge disposal) of metabolizable organic wastes are presented.