Apparatus for the treatment of wastewater

Details Apparatus for the treatment of wastewater Apparatus for the treatment of wastewater

1977-10-18

1979-12-18

Castel, Benoit

Liquid purification or separation

With gas-liquid surface contact means

With separator

210202, 210DIG28, 210196, 210275, C02C 106

Patent

active

041793749

ABSTRACT:
Apparatus for the treatment of wastewater has an enclosed unit providing a facultative zone wherein a mixture low in dissolved carbon comprising raw sewage and partially processed sewage undergoes denitrification brought about by faculative organisms contained in the prevailing low oxygen environment. Effluent from the facultative zone is charged into an enclosed columnar oxidation unit where a controlled flow of air or oxygen oxidizes nitrogen compounds present in raw sewage into nitrates. Part of the effluent from this columnar oxidation unit wherein the limited flow of oxygen has been mostly consumed in oxidizing the nitrogen compounds and is low in dissolved oxygen is recycled to the facultative zone and part flows into a columnar denitrification zone wherein anaerobic microorganisms substantially completely remove nitrogen as gas from the nitrates producing an effluent with a low nitrate content. Columnar oxidation units and denitrification units are in essentially deep-bed filters. Desirably also the facultative zone is provided in a columnar unit.

REFERENCES:
patent: 2562510 (1951-07-01), Schlenz
patent: 3579439 (1971-05-01), Meiring et al.
patent: 3709364 (1973-01-01), Savage
patent: 3713543 (1973-01-01), Heaney
patent: 3846289 (1974-11-01), Jeris et al.
patent: 3964998 (1976-06-01), Barnard
patent: 3994803 (1976-11-01), Neff et al.

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