Waste treatment process for alkaline waste liquid

Details Waste treatment process for alkaline waste liquid Waste treatment process for alkaline waste liquid

1991-04-17

1992-04-14

Silverman, Stanley S.

Liquid purification or separation

Processes

Ion exchange or selective sorption

210705, 210730, 423 6, 423 11, 423 12, C02F 128, C02F 154

Patent

active

051045494

ABSTRACT:
There is disclosed a waste treatment process for alkaline waste liquid in which substances to be removed exist in ionic and colloidal states. In the process, powdered tannin is added to the waste liquid to produce solid substance of the tannin and to capture the substances to be removed on the solid substance. Then, the waste liquid is subjected to filtration to thereby separate the solid substance including the substances to be removed.

REFERENCES:
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patent: 3374081 (1968-03-01), Miller
patent: 3725291 (1973-04-01), Serbus et al.
patent: 4089779 (1978-05-01), Neal
patent: 4110208 (1978-08-01), Neal
patent: 4180545 (1979-12-01), McCullough et al.
patent: 4263148 (1981-04-01), Symens et al.
patent: 4558080 (1985-12-01), Quamme et al.
patent: 4781839 (1988-11-01), Kelly et al.
patent: 4871518 (1989-10-01), Yoon et al.

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