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PROCEDURE FOR THE REMOVAL OF HEAVY METALS FROM INDUSTRIAL WASTE WATER USING SUBMITTED ULTRA FILTRATION OR MICROFILTRATION MEMBRANES
PROCEDURE FOR THE REMOVAL OF HEAVY METALS FROM INDUSTRIAL WASTE WATER USING SUBMITTED ULTRA FILTRATION OR MICROFILTRATION MEMBRANES
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机译:使用超滤或微滤膜去除工业废水中重金属的程序
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摘要
A method of removing one or more heavy metals from industrial wastewater by use of a membrane separation process is disclosed. Specifically, the following steps are taken to remove heavy metals from industrial wastewater: (a) collecting an industrial wastewater containing heavy metals in a receptacle suitable to hold said industrial wastewater; (b) adjusting the pH of said system to achieve hydroxide precipitation of said heavy metal in said industrial wastewater; (c) adding an effective amount of a water soluble ethylene dichloride- ammonia polymer having a molecular weight of from about 500 to about 10,000 daltons that contain from about 5 to about 50 mole percent 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 ultrafiltration membrane or a microfiltration membrane; and (e) optionally back-flushing said membrane to remove solids from the membrane surface.
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