Wastewater treatment process

Details Wastewater treatment process Wastewater treatment process

C - Chemistry, Metallurgy

02

F

362/43

C02F 1/50 (2006.01) C02F 1/66 (2006.01) C02F 1/72 (2006.01) C02F 1/20 (2006.01)

Patent

CA 1163383

ABSTRACT Wastewater is continuously disinfected by com- bining the wastewater with sufficient SO2, and option- ally with acid, that the wastewater has a selected free SO2 content of at least 5 mg/liter. The combined SO2/wastewater is maintained at the selected free SO2 content for at least about 5 minutes. The wastewater can be treated by dissolving SO2 into a first portion of the wastewater and combining the first portion with SO2 dissolved therein with a second portion of the wastewater stream. SO2 can be stripped from the wastewater, and the stripped SO2 can be recycled.

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