Aerated facultative basin having a dual function aeration and sl

Details Aerated facultative basin having a dual function aeration and sl Aerated facultative basin having a dual function aeration and sl

1988-03-21

1989-08-15

Fisher, Richard V.

Liquid purification or separation

With gas-liquid surface contact means

210170, 2101953, 210197, 210220, B01D 2100

Patent

active

048571857

ABSTRACT:
A waste water and sewage treatment system for use in a facultative aeration-sedimentation basin or lagoon includes a submerged water pump mounted in a well in water communication with the basin. This pump supplies water under pressure to a water header on which a plurality of water jets are mounted in such a manner as to create the forced water circulation inside the basin. Each water jet incorporates an air-sucking venturi to oxygenate the waste water or sewage. Valves are provided in the well for disconnecting the water pump from the water header and then connecting it to a sludge collecting duct extending from the well over a given distance into the basin in such a manner as to drain off the accumulated sludge at the bottom of the basin through the sludge collecting duct and drain-out through a sludge disposal pipe. The system is particularly interesting in that it makes use of the same pump to aerate the waste water or sewage and drain-off the accumulated sludge.

REFERENCES:
patent: 3840457 (1974-10-01), Wilson
patent: 3926808 (1975-12-01), Goddard
patent: 3957633 (1976-05-01), Gatti et al.
patent: 3997437 (1976-12-01), Prince et al.
patent: 4002561 (1977-01-01), Traverse
patent: 4231874 (1980-11-01), Heiligtag
patent: 4618426 (1986-10-01), Mandt

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