Aeration tank for activated-sludge process sewage treatment

Details Aeration tank for activated-sludge process sewage treatment Aeration tank for activated-sludge process sewage treatment

1982-01-07

1984-02-07

Castel, Benoit

Liquid purification or separation

Processes

Treatment by living organism

210626, 210629, 210219, 210220, C02F 316

Patent

active

044302258

ABSTRACT:
A pressurized aeration tank is provided which comprises an inner barrel arranged on the tank axis and an axial-flow impeller of optimum characteristics mounted therein, the inner barrel and the outer barrel or body portion of the tank being particularly proportioned and arranged relative to each other to define in the tank a circuitous flow passage of minimal total resistance loss. With this tank structure, a highly improved plant efficiency of BOD removal is readily obtainable with the use of concentrated activated sludge and aerobic microorganisms, mainly of the Opercularia group, in a specified range of tank pressure.

REFERENCES:
patent: 3444076 (1969-05-01), Sekikawa et al.
patent: 3772187 (1973-11-01), Othmer
patent: 4085041 (1978-04-01), Fullerton et al.
patent: 4267050 (1981-05-01), Conway et al.
patent: 4290885 (1981-09-01), Kwak
patent: 4374027 (1983-02-01), Severeid et al.

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