Phosphate removal from BOD-containing wastewater

Details Phosphate removal from BOD-containing wastewater Phosphate removal from BOD-containing wastewater

1975-10-28

1977-08-16

Wyse, Thomas G.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 7, 210 8, 210 14, 210 16, 210 18, C02C 117

Patent

active

040424936

ABSTRACT:
Activated sludge wastewater treatment process for removing phosphate from BOD-containing wastewater in which phosphate-enriched sludge formed in the aeration zone is settled in a phosphate stripping zone under anaerobic conditions to cause release of phosphate from the sludge solids. The released phosphate is countercurrently stripped from the sludge in the stripping zone by a low phosphate, low solids stripping medium to provide phosphate-lower sludge for recirculation to the aeration zone.

REFERENCES:
patent: 3235487 (1966-02-01), Westgarth
patent: 3236766 (1966-02-01), Levin
patent: 3385785 (1968-05-01), Forrest et al.
patent: 3386910 (1968-06-01), Forrest
patent: 3390077 (1968-06-01), Forrest
patent: 3654147 (1972-04-01), Levin et al.
patent: 3654147 (1972-04-01), Levin et al.
patent: 3660277 (1972-05-01), McWhirter et al.
patent: 3670887 (1972-06-01), McWhirter

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