Waste disposal treatment of calcium-containing organically loade

Details Waste disposal treatment of calcium-containing organically loade Waste disposal treatment of calcium-containing organically loade

1978-08-15

1980-10-14

Therkorn, Ernest G.

Liquid purification or separation

Processes

Treatment by living organism

210627, 210631, C02C 106

Patent

active

042279984

ABSTRACT:
For the treatment of wastewaters containing substantial BOD and substantial calcium ion concentrations, e.g., effluents from the washing and flushing cycles of sugar manufacturing plants, by an activated sludge process, under aeration with an O.sub.2 -containing gas, the improvement which comprises introducing a CO.sub.2 -containing gas having a concentration of CO.sub.2 higher than that of air into liquid present in the activated sludge system to precipitate calcium ion as calcium carbonate thereby lowering the pH of the liquid and facilitating the separation of the activated sludge solids and the bacterial action of the activated sludge process.

REFERENCES:
patent: 2196840 (1940-04-01), Singleton
patent: 3345288 (1967-10-01), Sontheimer
patent: 3356609 (1967-12-01), Bruemmer
patent: 3440166 (1969-04-01), Davis
patent: 3546111 (1970-12-01), Bush
patent: 3640820 (1972-02-01), Kemmer
patent: 3947350 (1976-03-01), Cardinal
patent: 4071443 (1978-01-01), Gorski
"Sugar" 28th year, vol. 10, pp. 527-534, 1975.

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