发明名称 |
METHOD OF HEAVY METAL REMOVAL FROM INDUSTRIAL WASTEWATER USING SUBMERGED ULTRAFILTRATION OR MICROFILTRATION MEMBRANES |
摘要 |
<p>A method of removing one or more heavy metals from industrial wastewater by a disclosed membrane separation process. Specifically, the following steps of: (a) collecting an industrial wastewater containing heavy metals in a receptacle (b) adjusting the pH so 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 from 500 to 10,000 daltons that contain from 5 to 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.</p> |
申请公布号 |
CA2663138(C) |
申请公布日期 |
2015.04.28 |
申请号 |
CA20072663138 |
申请日期 |
2007.06.22 |
申请人 |
NALCO COMPANY |
发明人 |
MUSALE, DEEPAK A.;JOHNSON, BRIAN S. |
分类号 |
C02F1/62;B01D61/02;B01D61/14;C02F1/44;C02F1/52;C02F1/56;C02F1/66 |
主分类号 |
C02F1/62 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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