Method for treating industrial effluent

Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...

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210721, 210724, 210760, 210763, 210908, 210909, C02F 152

Patent

active

056414072

ABSTRACT:
Hydrophobic organic substances are separated from aqueous industrial effluent containing said hydrophobic organic substances and hydrophilic organic substances by adding to the effluent at substantially neutral pH a salt of a metal having an insoluble hydroxide thereby forming an hydroxide sludge entraining said hydrophobic, oxidizable organic substances, and separating the sludge from the treated effluent containing the hydrophilic organic substances. The invention has particular application to the removal of toxic hydrophobic, oxidizable organic substances from aqueous industrial effluent and their subsequent destruction by oxidation, especially ozonation, of the separated sludge, thereby reducing the oxygen demand compared with oxidation of the entire effluent to reduce said toxic substances to their discharge consent level.

REFERENCES:
patent: 3901804 (1975-08-01), Ohuchi et al.
patent: 4049545 (1977-09-01), Horvath
patent: 4717484 (1988-01-01), Kauffer

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