Waste water treatment

Details Waste water treatment Waste water treatment

1978-06-19

1979-07-10

Castel, Benoit

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 14, 210 16, 210 18, 210DIG28, C02C 106

Patent

active

041607244

ABSTRACT:
Removal of nitrogenous and carbonaceous contaminants is carried out in a single sludge two-tank system by a symbiotic two-step process whereby the second tank mainly oxidizes ammonia to nitrate and the first tank mainly reduces nitrate to nitrogen gas. The biological sludge is the same in both tanks but different reactions occur as the mixed microbial population moves through various environmental conditions in the tanks. Most of the carbonaceous material is removed in the first tank by a combination of biological uptake with cell growth and use of the carbon as a final electron acceptor in respiratory denitrification.

REFERENCES:
patent: 3579431 (1971-05-01), Meiring et al.
patent: 3817857 (1974-06-01), Torpey
patent: 3964998 (1976-06-01), Barnard
patent: 3980556 (1976-09-01), Besik
patent: 4008159 (1977-02-01), Besik
patent: 4011156 (1977-03-01), Dubach et al.
patent: 4056465 (1977-11-01), Spector

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