Wastewater treatment method, method of suspensions separation an

Details Wastewater treatment method, method of suspensions separation an Wastewater treatment method, method of suspensions separation an

1995-11-22

1998-12-15

Lithgow, Thomas M.

Liquid purification or separation

Processes

Treatment by living organism

210623, 210703, 210713, 210715, C02F 124, C02F 312, C02F 900

Patent

active

058491910

ABSTRACT:
A wastewater treatment method involving mixing of the wastewater with an activated sludge and water that has been supersaturated with air under high pressure is described. After the pressure is reduced two processes are carried out which are biological oxidation of pollutants by activated sludge and flotation of suspended solids. A portion of the treated water is saturated with air and returned to the beginning of the process. The waste activated sludge is removed along with some floated and biologically non-oxidated pollutant particles.

REFERENCES:
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patent: 3444076 (1969-05-01), Sekikawa
patent: 4085041 (1978-04-01), Fullerton
patent: 4271027 (1981-06-01), Kelly
patent: 4374027 (1983-02-01), Seveveid
patent: 4430225 (1984-02-01), Takamatsu
patent: 4460470 (1984-07-01), Reimann
patent: 5240600 (1993-08-01), Wang

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