Treatment of wastewater containing phosphorus compounds

Details Treatment of wastewater containing phosphorus compounds Treatment of wastewater containing phosphorus compounds

1983-03-07

1984-12-18

Wyse, Thomas

Liquid purification or separation

Processes

Treatment by living organism

210625, 210903, 210906, C02F 330

Patent

active

044889674

ABSTRACT:
Wastewater containing phosphorus values and BOD is initially admixed with recycled sludge containing activated biomass under anaerobic conditions, then contacted with oxygen-containing gas, followed by separation of a dense sludge layer from the mixed liquor. A portion of the sludge layer, containing the activated biomass, is held under non-aeration conditions for sufficient time to reduce any nitrates and/or nitrites contained therein, before admixture of the recycled sludge with the wastewater influent.

REFERENCES:
patent: 3654147 (1972-04-01), Levin et al.
patent: 3730882 (1973-05-01), Levin et al.
patent: 3756946 (1973-09-01), Levin et al.
patent: 3994802 (1976-11-01), Casey et al.
patent: 4056465 (1977-11-01), Spector
patent: 4183808 (1980-01-01), Drnevich
patent: 4271026 (1981-06-01), Chen et al.
Davelaar, D. et al., "Water SA", vol. 4, No. 2, Apr. 1978, pp. 54 to 60.

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