Process for treating wastewater

Details Process for treating wastewater Process for treating wastewater

C - Chemistry, Metallurgy

02

F

362/17

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

Patent

CA 1331897

PROCESS FOR TREATING WASTEWATER ABSTRACT OF THE DISCLOSURE The present invention entails a process for treating wastewater utilizing a return activated sludge process. Primary sludge is separated from the wastewater stream and conveyed into a fermentation tank and held a sufficient time to permit hydrolysis of suspended solids so as to produce soluble substrates. The soluble substrates are mixed with the return activated sludge and held for a selected time period to form conditioned return activated sludge. Thereafter, the conditioned return activated sludge is mixed in an initial aerobic treatment zone with pretreated wastewater. Thereafter, the mixed conditioned return activated sludge and pretreated wastewater is conveyed through a series of treatment zones, which may include at least one anoxic treatment zone, where phosphorus and other pollutants are removed from the wastewater.

601113

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