Sewage treatment process

Details Sewage treatment process Sewage treatment process

C - Chemistry, Metallurgy

02

F

C02F 1/04 (2006.01)

Patent

CA 2123175

ABSTRACT A waste water treatment system includes a preliminary first stage separator for separating an aqueous phase from other materials. A pressure vessel sedimentation follows for removing most of the remaining solids from the waste material. The liquid and a minor fraction of the solids then pass on to an evaporation vessel where water vapor is removed, compressed and passed through a condenser inside the evaporator vessel to recycle heat to the evaporator. The condensate then passes through a second heat exchanger that heats the liquid flowing into the evaporator. The effluent water has been purified by the evaporation. The residual solids are heat treated to evaporate residual moisture and to sterilize the solids using a steam-jacketed auger. The resulting solids are used as fertilizer.

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