发明名称 |
MEMBRANE FILTRATION PROCESS WITH HIGH WATER RECOVERY |
摘要 |
<p>A membrane filtration process includes pretreating an influent solution to remove suspended solids, to produce a pretreated solution. pH of the pretreated solution is adjusted to at least 8.3 or lower by injecting CO2 into the pretreated solution, to produce a conditioned solution. Injecting CO2 also serves to supplement bicarbonate in the conditioned solution. The conditioned solution is flowed through a membrane filtration unit, to produce a permeate solution and a retentate solution. The membrane filtration unit comprises reverse osmosis membranes or nanofiltration membranes, or both. The retentate solution is then treated to cause precipitation, to produce a supernatant solution and a reject solution. At least a portion of the supernatant solution is recirculated by combining it with the influent solution prior to the step of pretreating.</p> |
申请公布号 |
WO2012040880(A1) |
申请公布日期 |
2012.04.05 |
申请号 |
WO2010CN01534 |
申请日期 |
2010.09.30 |
申请人 |
GENERAL ELECTRIC COMPANY;WANG, SIJING;ZHU, YANRONG;HE, GAORONG |
发明人 |
WANG, SIJING;ZHU, YANRONG;HE, GAORONG |
分类号 |
B01D61/58 |
主分类号 |
B01D61/58 |
代理机构 |
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代理人 |
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地址 |
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