REMOVAL OF HUMIC SUBSTANCES AND ARSENIC FROM WASTE WATERS BY ENHANCED COAGULATION WITH INORGANIC POLYMERS OF ALUMINUM AND SILICON

摘要

Enhanced coagulation with neorganic polymers Al and SiO2 described by this procedure achieve the best effects with removing humic substances (80 %) and arsenic (90 %) from raw waters so that already in the phase of coagulation and separation of flock wherefrom obtained is a drinking water of standard quality and in the conditions of extremely high contents of humic matters, being of type of underground waters from the springs of the town of Zrenjanin: with the consumption of KMnO4 above 50 mg/dm3 and the total of As above 100 μg/dm3. High enhancement of effects of removing specific pollutions from waste waters is achieved by optimization of conditions for purification and procuring energy conditions to generate flock. Choice of different procedures for separation of flocks, either standard schemes of separation (sedimentation or floatation with sand filtration) or membrane separaton processes in the continuation provides optimization of purification processes in the plants.