Adsorption biooxidation treatment of waste waters to remove cont

Details Adsorption biooxidation treatment of waste waters to remove cont Adsorption biooxidation treatment of waste waters to remove cont

1975-01-13

1976-09-14

Hart, Charles N.

Liquid purification or separation

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

Responsive to fluid flow

210 7, 210 16, 210 17, 210 40, 210DIG28, C02C 104

Patent

active

039805565

ABSTRACT:
Suspended and dissolved biodegradable carbonaceous materials and nitrogenous materials present as contaminants in waste water, typically in raw domestic or municipal sewage, are substantially removed by a one-stage treatment. The waste water is contacted with a mixture of activated carbon and microorganisms, known herein as activated sludge, having molecular oxygen absorbed therein, which results in adsorption and biooxidation of the carbonaceous material, biooxidation of non-nitrate nitrogenous material to nitrate and depletion of the molecular oxygen whereupon biological reduction of the nitrate to nitrogen gases occurs. The nitrogen gases are vented and the resulting treated water is separated from the activated sludge. Regeneration of the activated sludge may be achieved by air stripping, after which the regenerated activated sludge material may be recycled. Further, the treated water may be subjected to clarification to complete the biological reactions and to remove residual suspended solids. The activated sludge from the clarification may be regenerated by air stripping followed by recycle of the regenerated material to the reactor.

REFERENCES:
patent: 1734011 (1929-10-01), Harrison
patent: 2562510 (1951-07-01), Schlenz
patent: 3557954 (1971-01-01), Welch
patent: 3563888 (1971-02-01), Klock
patent: 3654147 (1972-04-01), Levin et al.
patent: 3803029 (1974-04-01), Blecharczyk
patent: 3846289 (1974-11-01), Jeris et al.
patent: 3853752 (1974-12-01), Tymoszczuk

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