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短流程膜工艺中紫外预处理对膜生物污染的影响

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丁燕燕, 王兴, 马百文, 梁义. 短流程膜工艺中紫外预处理对膜生物污染的影响[J]. 环境工程学报, 2019, 13(1): 1-8. doi: 10.12030/j.cjee.201807020
引用本文: 丁燕燕, 王兴, 马百文, 梁义. 短流程膜工艺中紫外预处理对膜生物污染的影响[J]. 环境工程学报, 2019, 13(1): 1-8. doi: 10.12030/j.cjee.201807020
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DING Yanyan, WANG Xing, MA Baiwen, LIANG Yi. Effect of UV pretreatment on membrane bio-contamination during shortened ultrafiltration membrane process[J]. Chinese Journal of Environmental Engineering, 2019, 13(1): 1-8. doi: 10.12030/j.cjee.201807020
Citation: DING Yanyan, WANG Xing, MA Baiwen, LIANG Yi. Effect of UV pretreatment on membrane bio-contamination during shortened ultrafiltration membrane process[J]. Chinese Journal of Environmental Engineering, 2019, 13(1): 1-8. doi: 10.12030/j.cjee.201807020
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短流程膜工艺中紫外预处理对膜生物污染的影响

  • 1.

    中国科学院生态环境研究中心，饮用水科学与技术重点实验室，北京 100085

  • 2.

    中国科学院大学，北京 100049

  • 3.

    天津膜天膜科技股份有限公司，膜材料与膜应用国家重点实验室，天津 300457

  • 基金项目:

    国家重点研发计划项目(2016YFC0400802)

    国家自然科学基金青年基金资助项目(51608514)

    中国科学院饮用水科学与技术重点实验室专项(17Z03KLDWST)

Effect of UV pretreatment on membrane bio-contamination during shortened ultrafiltration membrane process

  • 1.

    Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China

  • 2.

    University of Chinese Academy of Sciences, Beijing 100049, China

  • 3.

    State Key Laboratory of Membrane Materials and Membrane Applications, Tianjin Motimo Membrane Technology Co.Ltd.，Tianjin 300457, China

  • Fund Project:

  • 摘要: 近年来，以超滤膜为核心的短流程工艺因其占地面积小、净水效率高备受关注，但随之而来的生物污染问题是阻碍长期运行的瓶颈。基于此，考察了紫外预处理作用下，短流程工艺长期运行条件下的膜污染行为。结果表明，一定程度的紫外预处理(180 μW·cm-2)能有效减缓短流程膜工艺的生物污染问题。运行60 d后，膜池中微生物的死亡/存活比率由39.90%/60.10%升高至66.40%/33.60%，滤饼层中胞外聚合物浓度为未经紫外预处理时的76.50%。此时，紫外预处理的跨膜压差上升至34.40 kPa，而未经紫外预处理的跨膜压差高达41.50 kPa。然而，紫外预处理由于灭菌范围广和不可持续性，导致膜表面滤饼层中的微生物群落结构和丰度几乎无变化。同时，紫外预处理对出水水质几乎无影响。
    Abstract: In recent years, the shortened process with ultrafiltration (UF) membrane has shown excellent performance due to its small land use and high water purification efficiency. However, severe membrane fouling was induced by microorganisms after long time operation. Therefore, the corresponding behavior of UF membrane fouling was investigated with ultraviolet (UV) pretreatment. The results showed that UV pretreatment (180 μW·cm-2) could effectively slow down the bio-pollution. The dead/live rate of microorganisms in the membrane tank increased from 39.90%/60.10% to 66.40%/33.60% after running for 60 days. The concentration of extracellular polymeric substance released by microorganisms with UV pretreatment was 76.50% of that without UV pretreatment. In addition, the transmembrane pressure only increased to 34.40 kPa after 60 d of operation for this process with UV pretreatment, while it significantly increased to 41.50 kPa without UV pretreatment. Due to broad sterilization and unsustainable characteristics of UV pretreatment, little variation of microbial community and abundance in the cake layer was observed between these two processes. Moreover, the effluent quality was little influenced by UV pretreatment.
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  • 刊出日期:  2019-01-08

短流程膜工艺中紫外预处理对膜生物污染的影响

  • 1. 中国科学院生态环境研究中心，饮用水科学与技术重点实验室，北京 100085
  • 2. 中国科学院大学，北京 100049
  • 3. 天津膜天膜科技股份有限公司，膜材料与膜应用国家重点实验室，天津 300457
基金项目:

国家重点研发计划项目(2016YFC0400802)

国家自然科学基金青年基金资助项目(51608514)

中国科学院饮用水科学与技术重点实验室专项(17Z03KLDWST)

摘要: 近年来，以超滤膜为核心的短流程工艺因其占地面积小、净水效率高备受关注，但随之而来的生物污染问题是阻碍长期运行的瓶颈。基于此，考察了紫外预处理作用下，短流程工艺长期运行条件下的膜污染行为。结果表明，一定程度的紫外预处理(180 μW·cm-2)能有效减缓短流程膜工艺的生物污染问题。运行60 d后，膜池中微生物的死亡/存活比率由39.90%/60.10%升高至66.40%/33.60%，滤饼层中胞外聚合物浓度为未经紫外预处理时的76.50%。此时，紫外预处理的跨膜压差上升至34.40 kPa，而未经紫外预处理的跨膜压差高达41.50 kPa。然而，紫外预处理由于灭菌范围广和不可持续性，导致膜表面滤饼层中的微生物群落结构和丰度几乎无变化。同时，紫外预处理对出水水质几乎无影响。

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