Treatment of vegetable tanning wastes

Details Treatment of vegetable tanning wastes Treatment of vegetable tanning wastes

1977-07-18

1979-01-30

Hart, Charles N.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 53, 210 54, 210 56, C02B 120, C02C 502

Patent

active

041371631

ABSTRACT:
Highly colored tannin bodies and other suspended solids are separated from highly alkaline vegetable tannery waste effluent by scrubbing hot combustion gas with the effluent, introducing polyacrylamide flocculant into the effluent either immediately before scrubbing or during scrubbing, and separating floatable foam and settleable solids from the effluent after scrubbing. The effluent may be treated with a soluble salt of a trivalent metal before scrubbing to act as a primary flocculant.

REFERENCES:
patent: 1263532 (1918-04-01), Cummings
patent: 2350111 (1944-05-01), Hood
patent: 2860987 (1958-11-01), Werner
patent: 3009873 (1961-11-01), Kerr
patent: 3419493 (1968-12-01), Pangle
patent: 4013555 (1977-03-01), Davis

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