Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Effect of Aeration Basin Configuration on Bulking at Low Organic Loading.
Author Lee, Sang-Eun ; Koopman, Ben L. ; Jenkins, David ;
CORP Author California Univ., Richmond. Sanitary Engineering and Environmental Health Research Lab.;Municipal Environmental Research Lab., Cincinnati, OH.
Year Published 1982
Report Number EPA-R-806107; EPA-600/2-82-081;
Stock Number PB82-234287
Additional Subjects Sewage treatment ; Activated sludge treatment ; Bulking ; Aeration ; Performance evaluation ; Graphs(Charts) ;
Library Call Number Additional Info Location Last
NTIS  PB82-234287 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 37p
Continuous-flow laboratory-scale activated sludge units were operated on domestic sewage at low F/M. In CSTR units at the F/M range of 0.05-0.25 g COD removed/g TMLVSS, day, bulking did not occur with a weak (BOD(5) = 139 mg/L) sewage feed and TMLSS = 1.5 g/L. Supplementation of sewage by blending with raw sludge produced a stronger sewage (BOD(5) = 315 mg/L) which caused TMLSS to increase to 3.5 g/L. Bulking occurred in CSTR, 2, 4, 8, and 16 compartment units. An aeration basin with initial compartment 1/32nd of aeration basin volume prevented but did not cure bulking. An aeration basin with initial compartments 1/74th of aeration basin volume, prevented and cured bulking. Anoxia in an aeration basin with two initial compartments each 1/64th of the total aeration basin volume did not aid in curing bulking. The SVI of sludges at low F/M (0.3-0.35 g COD removed/g TMLVSS, day) and high TMLSS (3.5 g/L) is related to conditions in the initial compartment rather than those in the remainder of the aeration basin. Initial compartment soluble COD, first-compartment F/M, and initial compartment size are important; floc loading, dispersion number and total number of aeration basin compartments are not important.