Aerobic-anaerobic sludge digestion process

Details Aerobic-anaerobic sludge digestion process Aerobic-anaerobic sludge digestion process

C - Chemistry, Metallurgy

02

F

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C02F 3/30 (2006.01) C02F 3/12 (2006.01) C02F 3/26 (2006.01)

Patent

CA 1096064

11234-1 AEROBIC/ANAEROBIC SLUDGE DIGESTION PROCESS Abstract of the Disclosure A process for digestion of sludge wherein the sludge is oxygenated in a first covered digestion zone at a temperature of from 45° to 75°C to partially reduce the biodegradable volatile suspended solids (VSS) content of the sludge. The partially stabilized sludge is anaerobically digested in a second covered digestion zone at a temperature of from 30° to 60°C to further re- duce the biodegradable VSS content of the sludge, to less than about 40% of the VSS content of the sludge intro- duced to the first digestion zone. S P E C I F I C A T I O N

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