| Main Title |
Pilot plant evaluation of alternative activated sludge systems / |
| Author |
Heidman, James A.
|
| CORP Author |
District of Columbia Dept. of Environmental Services, Washington. EPA-DC Pilot Plant.;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 |
1977 |
| Report Number |
EPA/600/2-77/108; EPA-68-03-0349 |
| Stock Number |
PB-272 758 |
| OCLC Number |
35264086 |
| Subjects |
Sewage--Purification--Activated sludge process ;
Water treatment plants--United States
|
| Additional Subjects |
Activated sludge process ;
Sewage treatment ;
Combined sewers ;
Substitutes ;
Pilot plants ;
Performance evaluation ;
Tables(Data) ;
Design criteria ;
Process charting ;
Biochemical oxygen demand ;
Plug flow reactors
|
| Internet Access |
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| EJBD |
EPA 600-2-77-108 |
c.1 |
Headquarters Library/Washington,DC |
03/26/2014 |
| ELBD ARCHIVE |
EPA 600-2-77-108 |
Received from HQ |
AWBERC Library/Cincinnati,OH |
10/04/2023 |
| ELBD RPS |
EPA 600-2-77-108 |
repository copy |
AWBERC Library/Cincinnati,OH |
10/17/2014 |
| ESAD |
EPA 600-2-77-108 |
|
Region 10 Library/Seattle,WA |
03/23/2010 |
| NTIS |
PB-272 758 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
xii, 157 p. : ill. ; 28 cm. |
| Abstract |
Step feed, plug flow and complete mix activated sludge systems were compared on a pilot plant scale under similar operating conditions with the same municipal wastewater. The process loading to each system was varied over a wide range during the course of the investigation. Extended periods of steady state operation at constant flow provided extensive data on effluent quality, sludge yield, settling characteristics, etc. at several fixed F/M loadings for each of the system configurations. All systems demonstrated that the variability in carbonaceous effluent quality was mostly influenced by the suspended solids concentrations in the effluent over a wide range of process loadings. Sludge production was the same within experimental error in all systems at comparable SRT's. Analysis of the aggregate data from all systems produced a yield coefficient of 0.79 g VSS/g BOD5 applied and a decay coefficient of 0.064/day. The sludge from the complete mix system exhibited the poorest settling characteristics. A step feed system was found to offer the best physical arrangement for secondary treatment of District of Columbia wastewater. |
| Notes |
Includes bibliographical references (p. 154-157). |
