微污染水库水超滤膜处理工艺的试验研究
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Experimental study on ultrafiltration membrane process for treatment of slightly-polluted reservoir water
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    摘要:

    利用PVC合金超滤膜中试装置与不同预处理组合成“混凝-超滤”、“混凝-沉淀-超滤”和“混凝-气浮-超滤”3种工艺处理微污染水库水,研究其净水效果及跨膜压差变化规律。结果表明:3种组合工艺的浊度去除率均在99%以上;镜检出水细菌、藻类含量基本接近零;对CODMn、UV254的去除效果顺序为:“混凝-气浮-超滤”>“混凝-沉淀-超滤”>“混凝-超滤”;红外光谱分析结果显示,亲水性有机物是引起膜污染的主要物质;低温低浊期,跨膜压差随着产水时间变化趋势线的斜率为0.016 4、跨膜压差平均值为23.57 kPa;高温高藻期斜率为0.043 2、跨膜压差平均值为21.28 kPa。

    Abstract:

    In this study, the PVC alloy ultrafiltration(UF)membrane pilot device and different pretreatment processes were used to develop three processes, including the coagulation-UF, coagulation-sedimentation-UF, and coagulation-flotation-UF processes, for the treatment of slightly-polluted reservoir water. The water purification effects of these processes and the changing pattern of the transmembrane pressure(TMP)were analyzed. The results show that the turbidity removal rate was above 99% when the three processes were used; almost no algae or bacteria were detected in the outflow through microscopic examination; the three processes can be ranked by their effects in removing CODMn and UV254in the following descending order: coagulation-flotation-UF, coagulation-sedimentation-UF, and coagulation-UF; the results of ATR-FTIR show that hydrophilic organic matter was the main substance causing membrane fouling; during the low-temperature and low-turbidity period, the slope of the variation trend line of the TMP was 0. 016 4, and the average TMP was 23. 57 kPa; and, during the high-temperature and algae-laden period, the slope was 0. 043 2, and the average TMP was 21. 28 kPa.

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郑钊,裘建平,操家顺.微污染水库水超滤膜处理工艺的试验研究[J].水资源保护,2016,32(3):89-93.(ZHENG Zhao, QIU Jianping, CAO Jiashun. Experimental study on ultrafiltration membrane process for treatment of slightly-polluted reservoir water[J]. Water Resources Protection,2016,32(3):89-93.(in Chinese))

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  • 收稿日期:2015-10-09
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  • 在线发布日期: 2016-05-25
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