| 标题 |
 Treatment of flue gas desulfurization wastewater with near-zero liquid discharge by nanofiltration-membrane distillation process 纳滤——膜蒸馏法处理近零排放烟气脱硫废水
相关领域
化学
烟气脱硫
纳滤
废水
卤水
渗透
烟气
膜蒸馏
膜
色谱法
制浆造纸工业
废物管理
环境工程
海水淡化
环境科学
有机化学
工程类
生物化学
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Pages 146-153 | Received 19 Jun 2017, Accepted 11 Sep 2017, Published online: 24 Oct 2017 ABSTRACT The treatment process for flue gas desulfurization (FGD) wastewater was investigated using an integrated nanofiltration–membrane distillation (NF-MD) technology for near-zero liquid discharge. The whole system could achieve over 99.99% salt rejection ratio and over 92% of water reclamation ratio. The salinity of the MD permeate was low (Cl less than 3 mg/L and SO-42- less than 1 mg/L) and the permeate could be reused by thermal power plants directly. High-purity (over 97%) brine (10% NaCl, w/w) was produced after MD concentration. It was found that chemical softening and NF pretreatment could decrease MD membrane scaling significantly. No wastewater was discharged during the whole process. Such hybrid NF-MD system has the potential for practical application in FGD wastewater treatment. |
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