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

摘要

A method of removing one or more heavy metals from industrial wastewater by a disclosed membrane separation process. Specifically, the following step s of: (a) collecting an industrial wastewater containing heavy metals in a r eceptacle (b) adjusting the pH so said system to achieve hydroxide precipita tion of said heavy metal in said industrial wastewater (c) adding an effecti ve amount of a water soluble ethylene dichloride-ammonia polymer having a mo lecular weight from 500 to 10,000 daltons that contain from 5 to 50 mole per cent of dithiocarbamate salt groups to react with said heavy metals in said industrial wastewater system (d) passing said treated industrial wastewater through a submerged membrane, wherein said submerged membrane is an ultrafil tration membrane or a microfiltration membrane and (e) optionally back-flush ing said membrane to remove solids from the membrane surface.