| 一体式膜-生物反应器长期运行中的膜污染控制 |
| 摘要点击 1541 全文点击 2886 投稿时间：1999-04-09 |
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| 中文关键词 膜-生物反应器 膜污染 在线药洗 曝气 反冲洗 |
| 英文关键词 membrane bioreactor, membrane fouling, chemical cleaning online, aeration, back washing. |
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| 中文摘要 |
| 考察一体式膜－生物反应器运行过程中的膜污染情况，探讨造成膜污染的原因和膜污染的控制方法．结果表明，膜内表面微生物的滋生和膜外表面污泥层的附着是造成本试验膜污染的重要因素．采用２％ ～５％ 的次氯酸钠溶液进行在线药洗可以有效地去除膜内表面滋生的微生物，使膜过滤压差下降７．７～５２ｋＰａ；停止进出水，加大曝气量进行空曝气是去除膜外表面附着污泥层的重要手段，可以使膜过滤压差下降３．８～１０．８ｋＰａ；采用处理出水进行反冲洗虽然有时可以使膜过滤压差出现较大程度的降低，但随之会出现出水水质恶化，膜过滤压差急剧升高的现象． |
| 英文摘要 |
| In this paper, the membrane fouling problem when operating an integrated membrane bioreactor was investigated and membrane fouling reasons as well as countermeasures were discussed. As a result, growth of microorganisms on membrane internal surface and adhesion of sludge layer on membrane external surface were shown to be crucial factors for membrane fouling. Chemical cleaning online with 2%～5% hypochlorite sodium solution was proved to be effective in reducing microorganisms on membrane internal surface. Suction pressure during membrane filtration was reduced 7 7～52 kPa in this process. To remove the adhered sludge layer on membrane external surface, intensified aeration in the reactor without any influent and effluent revealed to be an important method, which also achieved a pressure decrease of 3 8～10 8 kPa. Although back washing with treated water can sometimes reduce the suction pressure largely, it is always followed by such phenomenon as the deterioration of effluent water quality and a dramatically increase of suction pressure. |
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