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OLS Field Name OLS Field Data
Main Title Study of activated sludge separation by dynamic straining /
Author Dumanowski, James. ; Strom., Arvid
Other Authors
Author Title of a Work
Strom, Arvid
CORP Author FMC Corp., Itasca, Ill. Environmental Equipment Div.;Municipal Environmental Research Lab., Cincinnati, Ohio.
Publisher Environmental Protection Agency, Office of Research and Development, Municipal Environmental Research Laboratory ; For sale by the National Technical Information Service,
Year Published 1978
Report Number EPA/600/2-78/070; EPA-68-03-0427
Stock Number PB-284 903
OCLC Number 53463753
Additional Subjects Activated sludge process ; Sewage treatment ; Strainers ; Pilot plants ; Clarification ; Feasibility ; Sand filtration ; Flocculation ; Performance evaluation ; Particle sizes ; Biochemical oxygen demand ; Separation ; Design criteria ; Equipment ; Process charting ; Dynamic straining
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
NTIS  PB-284 903 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation viii, 55 pages : illustrations ; 28 cm.
Abstract Pilot plant studies were conducted on domestic wastewater to determine the feasibility of replacing or augmenting conventional activated sludge gravitational clarifiers by dynamic straining. This work was a continuation of the successful program accomplished under EPA report numbered PB-242 848. In the prior program, two dynamic strainers in series were employed. In this program, less expensive techniques for polishing the primary strainer effluent were investigated. Phase I covered pilot operations with the strainer in the aeration tank of an activated sludge plant producing a nitrified effluent. Phase II involved a non-nitrified effluent. In both phases, upflow and downflow sand filtration, settling, and flocculation-settling of the strainer effluent were investigated. Phase I flows were low but correlated well with the previous studies of strainer operating variables. Strainer effluent averaged 35 mg/l suspended solids with mixed liquor suspended solids (MLSS) of 6800 mg/l. The upflow and downflow sand filters, operating on strainer effluent, produced effluents of 8 and 3 mg/l suspended solids, respectively. Phase II, which called for high flows and high BOD loadings, was plagued with an intense growth of filamentous microorganisms, foaming, and development of a 'syrupy' mixed liquor. Proper strainer throughputs could not be maintained. Flow rates were not reproducible and did not correlate with prior work.
Notes Contract no. 68-03-0427. Issued June 1978. Includes bibliographical references. Microfiche.
Place Published Cincinnati, Ohio :
Supplementary Notes See also report dated 1972/73, PB-242 828.
Corporate Au Added Ent Municipal Environmental Research Laboratory.
Corp Au Ser Add Ent Environmental protection technology series ; EPA-600/2-78-070. United States. ; Environmental protection technology series ; EPA-600/2-78-070. United States. ; Environmental protection technology series ; EPA-600/2-78-070. United States.
PUB Date Free Form 1978.
Series Title Untraced Environmental protection technology series ; EPA-600/2-78-070
NTIS Prices PC A04/MF A01
BIB Level m
Cataloging Source OCLC/T
OCLC Time Stamp 20031119131615
Language eng
Origin OCLC
OCLC Rec Leader 01308nam 2200301Ka 45020