Patent ID: 6582605
Filing Date: 2003-06-24
Classification: C02F,Y10S

Abstract:
A method for treating industrial wastewater which includes organic contaminant materials, wherein the industrial wastewater is to be filtered and is pre-treated, said method including pretreatment steps comprising the steps ofproviding a combination of iron salts and peroxide to the wastewater maintaining the wastewater with said iron salts and peroxide at a pH in the range of about 2-6 for a specified time to oxidize said organic contaminant materials after said specified time adding a precipitating or flocculating agent and adjusting pH of said wastewater to a pH above about 7 so as to coagulate the organic contaminant materials in said wastewater into removable solids such that the removable solids have enhanced filterability and resistance to filter clogging or fouling, and passing the wastewater through a microfiltration membrane having a pore size in the range from 0.5 to 10 microns at a flow rate of at least 200 gallons per square foot of membrane per day, to remove said removable solids.