METHOD OF HEAVY METAL REMOVAL FROM INDUSTRIAL WASTEWATER USING SUBMERGED ULTRAFILTRATION OR MICROFILTRATION MEMBRANES

摘要

The present invention relates to a method for removing one or more heavy metals from industrial wastewater by the disclosed membrane separation process. Specifically, the method comprises the steps of: a) collecting industrial wastewater containing heavy metals in the reservoir; b) adjusting the pH of the system to effect hydroxide precipitation of the heavy metal in the industrial wastewater; c) adding an effective amount of a water soluble ethylenedi dichloride ammonia polymer having a molecular weight of from 500 to 10,000 daltons containing from 5 to 50 mol% of dithiocarbamate salt groups to react with said heavy metals in said industrial wastewater system ; d) passing the treated industrial wastewater through an immersion membrane, wherein the immersion membrane is an ultrafiltration membrane or a microfiltration membrane; And e) optionally, countercurrently cleaning the membrane to remove solid materials from the membrane surface.;Membranes, cationic polymers, anionic polymers, biantimetric polymers,