Main Title |
Study of activated sludge separation by dynamic straining / |
Author |
Dumanowski, James. ;
Strom., Arvid
|
Other Authors |
|
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; PB284903 |
Stock Number |
PB-284 903 |
OCLC Number |
04146563 |
ISBN |
pbk. |
Subjects |
Sewage--Purification--Activated sludge process
|
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 |
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
EHAM |
TD756.D84 |
|
Region 1 Library/Boston,MA |
04/29/2016 |
EJBD |
EPA 600-2-78-070 |
|
Headquarters Library/Washington,DC |
03/17/2014 |
ELBD ARCHIVE |
EPA 600-2-78-070 |
Received from HQ |
AWBERC Library/Cincinnati,OH |
10/04/2023 |
ELBD |
EPA 600-2-78-070 |
|
AWBERC Library/Cincinnati,OH |
11/20/1998 |
ESAD |
EPA 600-2-78-070 |
|
Region 10 Library/Seattle,WA |
03/23/2010 |
NTIS |
PB-284 903 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
viii, 55 pages : illustrations, figures, tables ; 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 |
"June 1978." Includes bibliographical references (page 42). U.S. Environmental Protection Agency Contract No. Contract Number: 68-03-0427, Program Element No. 1BC611, SOS#3, Task D-1/21. |