Process for treating pond water

Details Process for treating pond water Process for treating pond water

1991-05-22

1992-05-12

Silverman, Stanley S.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210724, 210906, 210915, 423163, 423339, 423490, 423308, C02F 160, C02F 152

Patent

active

051124998

ABSTRACT:
A two-stage process for treating acidic gypsum pond water for reuse or for discharge is disclosed. The first stage blends raw acidic pond water with recycled lime-treated slurry from the second stage of the process. The resulting elevation in pH causes CaF.sub.2 and SiO.sub.2 to precipitate and the precipitated material is discarded onto the gypsum storage area. The supernatant water can be used in the wet grinding mill and/or further treated in a second stage with lime to produce treated water which meets government environment standards for discharge. The slurry of calcium phosphate formed in the second (liming) stage is recycled to the first stage.

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