Main Title |
Demonstration of Thermophilic Aerobic-Anaerobic Digestion at Hagerstown, Maryland. |
Author |
Haas, O. W. ;
|
CORP Author |
Union Carbide Corp., Tonawanda, NY. Linde Div. ;Hagerstown Water Pollution Control Dept., MD.;Municipal Environmental Research Lab., Cincinnati, OH. Wastewater Research Div. |
Year Published |
1984 |
Report Number |
EPA-S-805823; EPA/600/2-84/142; |
Stock Number |
PB84-238252 |
Additional Subjects |
Sludge disposal ;
Sewage treatment ;
Anaerobic processes ;
Aerobic processes ;
Solid wastes disposal ;
Design criteria ;
Performance evaluation ;
Thermophiles ;
Anaerobic digestion ;
Aerobic digestion ;
Sludge treatment ;
Sewage sludge ;
Energy conservation ;
Hagerstown(Maryland) ;
Pathogens
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB84-238252 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
121p |
Abstract |
This report describes the successful operation of a new and novel approach to digestion of sludge at the Hagerstown wastewater treatment plant. The process, known as dual digestion, involved the coupling of a full-scale experimental aerobic reactor to an existing full-scale anaerobic digester for the treatment of Hagerstown's raw sludge. In the process, sludge is aerobically digested at thermophilic conditions, using pure oxygen for about one day, followed by a longer period of 8 to 16 days of mesophilic (or thermophilic) anaerobic digestion. The system handled 16,400 gallons of raw sludge per day with average autothermal temperature in the aerobic digester of 51C. Pathogen analyses of the raw and digested sludge samples indicated the process significantly reduced pathogen levels beyond that achieved by conventional anaerobic digestion practice. The dual digestion process proved itself to be an effective sludge stabilization process achieving an overall volatile solids destruction of 42 percent. |
Supplementary Notes |
Prepared in cooperation with Hagerstown Water Pollution Control Dept., MD. |
NTIS Title Notes |
Final rept. Aug 78-Mar 84. |
PUB Date Free Form |
Aug 84 |
Category Codes |
13B; 68C; 68D |
NTIS Prices |
PC A06/MF A01 |
Primary Description |
600/14 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
435622159 |
Origin |
NTIS |
Type |
CAT |