Miscellaneous drain water purifying method and miscellaneous dra

Details Miscellaneous drain water purifying method and miscellaneous dra Miscellaneous drain water purifying method and miscellaneous dra

1993-04-06

1994-08-30

Upton, Christopher

Liquid purification or separation

Processes

Treatment by living organism

210607, 210620, 210202, 210253, 2105322, C02F 330

Patent

active

053425235

ABSTRACT:
A method in which a miscellaneous drain water purifying device having a plurality of separator tanks connected to miscellaneous drain water sources via a change valve, receiving miscellaneous drain water, leaving it stagnant, and separating sedimentation and floating substances and a decomposition tank connected to a plurality of the respective separator tanks and receiving flow-out liquid from the sedimentation separator tanks is used, while one of the sedimentation separator tanks receives miscellaneous drain water and carries out sedimentation separation of sludge, sends out the top level clear water in the quantity equal to the received water quantity to the decomposition tank and carries out purifying treatment, an aeration treatment of the sludge separated from miscellaneous drain water by the previous stage prior to transfer is carried out in the other separator tank which is shut off from the miscellaneous drain water sources via the change valve; such transfer is alternatively repeated at suitable intervals.

REFERENCES:
patent: 3681236 (1972-08-01), Birgles et al.
patent: 3875051 (1975-04-01), Kovnik
patent: 3914164 (1975-10-01), Clark
patent: 4505813 (1985-03-01), Graves
patent: 4664795 (1987-05-01), Stegalt et al.
patent: 4824572 (1989-04-01), Scott
patent: 4892658 (1990-01-01), Martin et al.
patent: 5137636 (1992-08-01), Bundgaard

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