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A CONVENIENT COST-EFFECTIVE METHOD FOR RECYCLIZATION OF THE AQUEOUS WASTE EFFLUENTS OF CAR-PAINTING INDUSTRY

A CONVENIENT COST-EFFECTIVE METHOD FOR RECYCLIZATION OF THE AQUEOUS WASTE EFFLUENTS OF CAR-PAINTING INDUSTRY

Author: László Kótai, Tünde Kocsis, Anna Jánosity, Imre Kovács, Kalyan K. Banerji, Anna Mária Keszler
Abstract

Non-sedimentation nanoparticles containing alkaline wastewater as effluent from the cleaning process of car-painting lines can be purified by sedimentation after adding of mineral acids to adjust the pH below 5. Using 10 % aq. sulfuric acid to coagulate and filtrate the colloid particles, and adjusting the effluent pH with 10 wt. % aq. NaOH to the original value (~9), the wastewater can be recycled with ca. 0.3 % salt content into the cleaning process of the painting line (rinsing) technology.

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