Method of treating sludge containing arsenic

Details Method of treating sludge containing arsenic Method of treating sludge containing arsenic

1998-04-24

2000-08-22

Simmons, David A.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210713, 210724, 210911, C02F 158

Patent

active

061067261

ABSTRACT:
A method of treatment of an arsenic sludge obtained from a solid-liquid separation step on arsenic waste water by adjusting the value of pH to 12 or higher by adding a calcium compound is disclosed. The method is characterized by addition of hydrated lime and calcining the sludge.

REFERENCES:
patent: 5378366 (1995-01-01), Yen
patent: 5618439 (1997-04-01), Allgulin
patent: 5840194 (1995-01-01), Yokose et al.

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