Control of activated sludge wastewater treating process for...

Details Control of activated sludge wastewater treating process for... Control of activated sludge wastewater treating process for...

C - Chemistry, Metallurgy

02

F

362/4

C02F 3/30 (2006.01) C02F 1/00 (2006.01) C02F 3/12 (2006.01)

Patent

CA 1143486

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 contact- ing step. The improved method comprises maintaining both the F/M ratio and the BOD/P ratio within particular ranges, preferably relative to each other.

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