| 臭氧/混凝预处理工艺降低膜污染的研究 |
| 摘要点击 928 全文点击 776 投稿时间：2009-08-11 修订日期：2010-01-11 |
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| 中文关键词 臭氧 混凝 微滤膜 膜污染 黄浦江水 |
| 英文关键词 ozone coagulation microfiltration membrane membrane fouling Huangpu River |
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| 中文摘要 |
| 采用臭氧和混凝工艺分别处理黄浦江原水后进行MF膜过滤试验，考察2种预处理工艺对有机物的作用，进而考察其对MF膜过滤特性的影响.结果表明，2种预处理工艺都存在一个使膜污染下降率达到最大的最佳投药量.2种预处理工艺中，混凝降低膜污染的效果要好于臭氧，这主要与2种预处理工艺所去除的有机物性质有关.黄浦江水中有机物相对分子质量主要集中在3×103～5×103范围内，膜化学清洗液的分析表明造成膜污染的有机物相对分子质量主要集中在4.5×103附近，臭氧对相对分子质量在3×103附近的有机物去除效果较好，而混凝主要去除5×103附近的较大相对分子质量的有机物，因而混凝对这部分污染膜物质的去除效果要好于臭氧，从而有效降低了膜污染. |
| 英文摘要 |
| In order to investigate the effect of ozone and coagulation pretreatments on organic matter and MF membrane filtration, pretreated Huangpu River surface water was filtrated by MF membrane. The results showed that there were the optimal dosages of ozone and coagulant made maximum membrane flux. The result of membrane fouling reduction by coagulation was better than that by ozone, which was relative to character of organic matter removed by two pretreatment processes. Organics in Huangpu River water mostly concentrates in relative molecule mass(Mr) ranging 3×103-5×10３. Research on the chemical cleaning of the fouled membrane indicated that fouling organic substance concentrated about Mr 4.5×103. Removals of Mr 3×103 organic matter are higher than Mr 5×103 organic matter by ozone oxidation. Coagulation process can remove 5×103 high relative molecular mass organic matter effectively. Removal of these organics fouled membrane by coagulation was better than that by ozone, thereby to effectively reduce membrane fouling. |
