Method of processing waste sludge from wet phosphoric acid purif

Liquid purification or separation – Processes – Chemical treatment

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210907, 71 25, C02F 100

Patent

active

042578981

ABSTRACT:
The invention relates to a method of processing the waste sludge obtained in purification facilities for phosphoric acid produced by the wet process. The composition of this sludge is such that it cannot be utilized for any purpose in this state. It is known that sludge from wet phosphoric acid purification facilities contains different quantities of certain substances, the concentrations being such that these substances may not be allowed to mix with surface water or ground water under any circumstances, not even in the case of dumps. A typical composition of such waste sludge is as follows:

REFERENCES:
patent: 2983594 (1961-05-01), Jost
patent: 3135595 (1964-06-01), Williams
patent: 3579321 (1971-05-01), Stoller
patent: 3763041 (1973-10-01), Cook et al.
patent: 3956119 (1976-05-01), Davidtz

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