Wastewater treatment process

Details Wastewater treatment process Wastewater treatment process

1980-11-14

1982-05-11

Wyse, Thomas G.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210716, 210724, 210912, C02F 162

Patent

active

043292240

ABSTRACT:
Heavy metal pollutant ions are precipitated from a wastewater stream as metal sulfides through the addition of a calcium sulfide mixture to the stream. Methods are disclosed for forming the calcium sulfide mixture and for controlling the amount thereof added to the wastewater stream.

REFERENCES:
patent: 3740331 (1973-06-01), Anderson et al.
patent: 4102784 (1978-07-01), Schlauch
A. K. Robinson and J. C. Sum, "Sulfide Precipitation of Heavy Metals", U.S.E.P.A. EPA-600/2-80-139, Jun. 1980, pp. 7-12.
A. K. Robinson, "Sulfide-VS-Hydroxide Precipitation of Heavy Metals from Ind. Wastewater", U.S.E.P.A., EPA 600/8-78-010, 5/78, pp. 59-65.

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