Liquid purification or separation – Processes – Treatment by living organism
Patent
1979-04-06
1981-01-20
Castel, Benoit
Liquid purification or separation
Processes
Treatment by living organism
210607, 210613, 210621, 210630, 48197A, 210627, 210609, 210629, C02C 114
Patent
active
042460999
ABSTRACT:
A process for digestion of sludge wherein the sludge is oxygenated in a first digestion zone at temperature of from 35.degree. to 75.degree. C. 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.degree. to 60.degree. 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.
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Conrad, J. R. et al., "Anaerobic Acidogenesis of Wastewater Sludge", W.P.C.F. Journal, vol. 47, No. 1, Jan. 1975, pp. 30-45.
Gould Michael S.
Motsch Ladistas C.
Castel Benoit
Hultquist Steven J.
Union Carbide Corporation
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