Liquid purification or separation – Processes – Treatment by living organism
Patent
1979-02-06
1981-01-13
Wyse, Thomas G.
Liquid purification or separation
Processes
Treatment by living organism
2101953, 210197, 210628, C02F 320
Patent
active
042448158
ABSTRACT:
A process and apparatus for the purification of effluent waters containing organic pollutants by a rapid biological oxidation (activated sludge) process characterized in that the liquid to be purified is introduced into a tank containing a liquid having a high biomass concentration. Liquid is drawn from the tank and reintroduced through an aerating device in such a way as to produce rotation of the liquid in the tank to the extent that a vortex is produced on the surface. A part of the liquid taken from the tank is strayed on to the vortex and a proportion passed to a mechanical separating means that separates sludge from the liquid and a proportion of the separated sludge is reintroduced directly in to the tank. The liquid from which the sludge has been removed constitutes the purified effluent.
REFERENCES:
patent: 3220706 (1965-11-01), Valdespino
patent: 3271304 (1966-09-01), Valdespino et al.
patent: 3371033 (1968-02-01), Simmons et al.
patent: 3390076 (1968-06-01), DuBach
patent: 3448044 (1969-06-01), Garrett
patent: 3772187 (1973-11-01), Othmer
patent: 3959124 (1976-05-01), Tchobanoglous
Chaikin Malcolm
McCracken John R.
Unisearch Limited
Wyse Thomas G.
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