Main Title |
Effect of recycling thermophilic sludge on the activated sludge process / |
Author |
Prakasam, T. B. S. ;
Soszynski, S. ;
Zenz, D. R. ;
Lue-Hing, C. ;
Blyth, L.
|
Other Authors |
|
CORP Author |
Metropolitan Water Reclamation District of Greater Chicago, IL.;Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab. |
Publisher |
U.S. Environmental Protection Agency, Risk Reduction Engineering Laboratory, |
Year Published |
1990 |
Report Number |
EPA/600/2-90/037; EPA-R-811925 |
Stock Number |
PB90-258518 |
Subjects |
Sewage sludge--Illinois ;
Sewage sludge digestion
|
Additional Subjects |
Activated sludge process ;
Sludge digestion ;
Sewage treatment ;
Thermophiles ;
Aeration ;
Oxidation ;
High temperature tests ;
Substitutes ;
Dewatering ;
Performance evaluation ;
Waste recycling ;
Biological treatment ;
Biotechnology ;
Mesophilic conditions
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB90-258518 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
278 pages : illustrations ; 28 cm |
Abstract |
A full-scale investigation was undertaken at Chicago's Hanover Park Water Reclamation Plant (WRP) to study whether the net sludge production from the WRP could be reduced by implementing a scheme developed by W. Torpey et al. (1984). In this process, sludge is withdrawn from a thermophilic digester operated in series with a mesophilic digester and partially recycled into the aeration tanks of the activated sludge system. The Hanover Park WRP, which has a design flow capacity of 45,420 million cu m per day (12 mgd), was split into a control section and an experimental section. The two sections were operated similarly except the thermophilic drawoff was recycled into the aeration tanks of the experimental section from a digester system consisting of mesophilic and thermophilic digesters operated in series. A reduction in net sludge production of about 10 percent was achieved at 40 percent recycle of thermophilic sludge into the aeration tanks at the Hanover Park WRP. This was a much smaller reduction than obtained by Torpey et al. Sludge dewatering properties were not improved. The recycling produced no adverse effects on quality of the treated wastewater. |
Notes |
Caption title. "Sept. 1990." Includes bibliographical references (page 6). "EPA/600/2-90/037." Microfiche. |
Contents Notes |
EPA/600/2-90/037. |
Place Published |
Cincinnati, OH : |
Supplementary Notes |
Sponsored by Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab. |
Corporate Au Added Ent |
Risk Reduction Engineering Laboratory (U.S.) |
PUB Date Free Form |
{1990} |
NTIS Prices |
PC A13/MF A02 |
BIB Level |
m |
Cataloging Source |
OCLC/T |
OCLC Time Stamp |
20001130175811 |
Language |
eng |
Origin |
NTIS |
Type |
MERGE |
OCLC Rec Leader |
01105nam 2200289Ka 45020 |