Process for recovery of selected metal values from waste waters

Details Process for recovery of selected metal values from waste waters Process for recovery of selected metal values from waste waters

1976-11-22

1977-07-05

Ozaki, G.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 74, 75 77, 75 78, 75 79, 75 83, 75117, 75118R, 75103, 210 15, 44 10R, 204109, 204149, C22B 1500, C22B 1108

Patent

active

040337634

ABSTRACT:
A process for economically recovering metal values, especially precious metal values, from waste waters comprising a mixture of natural surface water, industrial waste water and organic waste, where the metal values appear in concentrations below levels previously commercially of interest, including the steps of concentrating the metal values of the waste waters by bacterial treatment thereof to imbibe and capture the metal values from the waters and immobilize them in a sludge, coagulating and separating the sludge from the water, de-watering the sludge and burning off the organic matter, and recovering selected metal values by inorganic metal-winning process steps.

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patent: 2927017 (1960-03-01), Marvin
patent: 3272621 (1966-09-01), Zajic
patent: 3516818 (1970-06-01), O'Neill et al.
patent: 3537986 (1970-11-01), Watanabe et al.
patent: 3796568 (1974-03-01), Szekely et al.
patent: 3819363 (1974-06-01), Wanzenberg
Hofman, Metallurgy of Lead, McGraw-Hill Book Co., N.Y., 1918, pp. 494-497.

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