Nitrification treatment of wastewater

Details Nitrification treatment of wastewater Nitrification treatment of wastewater

1981-09-01

1983-11-15

Castel, Benoit

Liquid purification or separation

Processes

Treatment by living organism

210617, 210630, 210150, 210903, C02F 308

Patent

active

044154542

ABSTRACT:
In a two stage activated sludge plant, where in the first stage the major proportion of the organic pollutants is decomposed and in the second stage the decomposition of the residual organic pollutants is conducted in conjunction with nitrification, the nitrifying bacteria are fixed on a low-density, macroporous carrier, e.g., particulate, polyurethane, optionally with activated carbon as well. The second stage can be operated as a mixed activated sludge tank or a biological filter, and in either case, it is possible to avoid a post clarification stage.

REFERENCES:
patent: 2071591 (1937-02-01), Tholin
patent: 3293174 (1966-12-01), Robjohns
patent: 3617540 (1971-11-01), Bishop et al.
patent: 3764523 (1973-10-01), Stankewich, Jr.
patent: 4009099 (1977-02-01), Jeris
patent: 4055490 (1977-10-01), Hasegawa et al.
patent: 4179374 (1979-12-01), Savage et al.
patent: 4256573 (1981-03-01), Shimodaira et al.

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