Aerobic/anaerobic sludge digestion process

Details Aerobic/anaerobic sludge digestion process Aerobic/anaerobic sludge digestion process

C - Chemistry, Metallurgy

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

Patent

CA 1115432

11234-2 AEROBIC/ANAEROBIC SLUDGE DIGESTION PROCESS Abstract of the Disclosure A process for digestion of sludge wherein the sludge is oxygenated in a first digestion zone at temperature of from 35° to 75° to partially reduce the biodegradable volatile suspended solids content of the sludge. The partially stabilized sludge is anaerobically digested in a covered second digestion zone at temperature of from 25° to 60°C to further reduce the biodegradable volatile suspended solids content of the sludge, to less than about 40% of the biodegradable volatile suspended solids content of the sludge introduced to the first digestion zone. S P E C I F I C A T I O N - 1 -

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