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折流式水解-复合膜生物法处理印染废水的特性

Keywords: 印染废水,折流式水解反应器(ABR),复合膜生物反应器(MBR)

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Abstract:

应用折流式水解-复合膜生物法处理印染废水,COD与色度去除效果显著。组合工艺出水COD在100mg/L以下,总去除率90%以上,出水色度为6倍以下,色度去除率达97%以上,达到纺织印染行业一级排放标准(COD≤100mg/L,色度≤40倍)。其中,ABR段的COD去除率在50%~65%,MBR段的COD去除率在78%~85%,COD的去除主要在MBR段,而色度去除主要在ABR段。此外,还对MBR段的HRT、污泥浓度、曝气量的影响进行了试验研究,结果表明,MBR段适宜的HRT为8~12h,污泥浓度为3~8.6g/L,气水比为23∶1~31∶1。

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