Sewage treatment method

Details Sewage treatment method Sewage treatment method

1995-06-05

1997-10-07

Wyse, Thomas G.

Liquid purification or separation

Processes

Treatment by living organism

210621, 210629, 210903, C02F 306, C02F 330

Patent

active

056743998

ABSTRACT:
The invention is directed to a sewage treatment system and method for treating sewage by microbes. The system includes and the method uses a settling tank with residual activated sludge and mixed liquor and an activated biofilm filter. Incoming sewage into the settling tank forms a settling tank liquor mixed liquor. Increments of the settling tank liquor mixed liquor are treated in the activated biofilm filter and returned to the settling tank where the treated mixed liquor improves the quality of the settling tank liquor mixed liquor in the settling tank. The process of treating and returning incremental quantities of the settling tank liquor mixed liquor continues over a Predetermined period of time after which the sewage is fully treated.

REFERENCES:
patent: 4303528 (1981-12-01), Shibayama
patent: 4818404 (1989-04-01), McDowell
patent: 5102548 (1992-04-01), Baxter
patent: 5126050 (1992-06-01), Irvine et al.
patent: 5520812 (1996-05-01), Ryhiner et al.

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