Process for treating liquid waste containing solid fine particle

Details Process for treating liquid waste containing solid fine particle Process for treating liquid waste containing solid fine particle

1981-03-12

1983-11-15

Hruskoci, Peter A.

Liquid purification or separation

Processes

Ion exchange or selective sorption

210912, 210919, 252631, C02F 142, G21F 912

Patent

active

044154577

ABSTRACT:
Backwash water containing radioactive cruds of a non-filter aid type filter of the primary cooling water system of an atomic power plant is treated by leading the backwash water directly, or supernatant obtained by removing coarse cruds by settling in advance, to a waste resin settling tank for backwash water containing waste ion exchange resin powder from filter-demineralizer of the condensation-purification system of the atomic power plant, mixing the backwash water or the supernatant with the backwash water from the filter-demineralizer in the tank, thereby allowing the cruds contained in the backwash water or the supernatant onto the waste ion exchange resin powder, and settling the crud-adsorbed waste ion exchange resin powder, thereby separating and removing the cruds from the backwash water from the non-filter aid type filter. Recycle of fine cruds can be eliminated with enhanced percent crud removal, and recycle time of backwash water can be shortened. Load on a concentrator can be reduced with reduced number of drums filled with radioactive waste.

REFERENCES:
patent: 3520805 (1970-07-01), Ryan
patent: 3805959 (1974-04-01), Mertens
patent: 3962078 (1976-06-01), Hirs
patent: 4033868 (1977-07-01), Meichsner et al.

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