Treatment of wastewater

Details Treatment of wastewater Treatment of wastewater

C - Chemistry, Metallurgy

02

F

362/25

C02F 3/22 (2006.01)

Patent

CA 1133151

11 B 30799 Abstract Treatment of Wastewater A method and apparatus for the treatment of wastewater in which the wastewater is circulated around a system comprising a downcomer and a riser communicating with each other at their lower ends, the level of the wastewater in the downcomer being maintained above the level of the wastewater in the riser and providing a hydrostatic pressure head which causes circulation of the wastewater around the system at a pre-selected rate, a gas containing free oxygen is supplied to the wastewater as it passes through the downcomer, and the wastewater in pumped from, or from near, the top of the riser back into the downcomer (or vessel com- municating therewith) at a position(s) above the highest level to which the wastewater in the downcomer can fluctuate during normal operation of the system when operating at maximum load.

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