Control of activated sludge wastewater treating process for enha

Liquid purification or separation – Processes – Treatment by living organism

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210614, 210903, 210906, C02F 330

Patent

active

042710260

ABSTRACT:
An improved method of operating an activated biomass process wherein influent and activated biomass are initially contacted under anaerobic conditions to form a mixed liquor, the mixed liquor is subsequently oxygenated, thereafter activated biomass is separated from the mixed liquor and at least a portion of the separated biomass is introduced into the initial contacting step. The improved method comprises maintaining both the F/M ratio and the BOD/P ratio within particular ranges, preferably relative to each other.

REFERENCES:
patent: 4056465 (1977-11-01), Spector
patent: 4162153 (1979-07-01), Spector
patent: 4173531 (1979-11-01), Matsch et al.
patent: 4183808 (1980-01-01), Drnevich

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