Method for the treatment of sewage and other impure water

Details Method for the treatment of sewage and other impure water Method for the treatment of sewage and other impure water

1988-08-05

1989-11-21

Wyse, Tom

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210727, 210728, 210734, C02F 156

Patent

active

048820695

ABSTRACT:
A method is provided herein for the treatment of sewage or other impure water. The method includes adding, to the sewage or other impure water in a mixing zone, all three individually but no more than two premixed together of the following: (a) an inorganic coagulant, (b) an anionic polymer, and (c) a cationic polymer, with intimate mixing of the added chemicals with the sewage or other impure water, with the proviso that (d) the inorganic coagulant, either alone or with the anionic polymer or the cationic polymer, cannot be added last; and (e) the anionic polymer and the cationic polymer cannot be intimately mixed and added together. This provides chemically-treated effluent having large, compact, firmly bonded, substantially-shear resistant and rapidly-separatable flocs therein. The flocs are separated from the liquid in a separating zone. Finally treated effluent effluent is removed from the separating zone.

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