Process for the secondary treatment of wastewater

Details Process for the secondary treatment of wastewater Process for the secondary treatment of wastewater

C - Chemistry, Metallurgy

02

F

362/16, 362/17

C02F 1/24 (2006.01) C02F 3/12 (2006.01)

Patent

CA 1117669

D.E.Severeid-D.D.Jech 1-1 Abstract of the Disclosure: A process for the secondary treatment of wastewater comprising aerating wastewater containing bacteria until the BOD level of the wastewater is substantially reduced, the food to microorganism ratio of the wastewater being greater than one, introducing the aerated wastewater under pressure to a flotation cell to separate suspended solids including bacteria from the pressurized wastewater by dissolved air flotation clarification, recycling said suspended solids and bacteria to said aeration step in an amount sufficient to maintain said food to micro- organism ratio and removing and disposing of the remaining reduced BOD level wastewater. - 16 -

320880

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