折流式水解-复合膜生物法处理印染废水的特性
Performance of the combination process of anoxic baffled reactor-hybrid
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摘要: 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100 mg/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≤100 mg/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8～12 h，污泥浓度为3～8.6 g/L，气水比为23∶1～31∶1。
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关键词:
- 印染废水 /
- 折流式水解反应器（ABR） /
- 复合膜生物反应器（MBR）
Abstract: The combination process of anoxic baffled reactor-hybrid membrane bioreactor was used to treat printing and dyeing wastewater and had obvious COD and color removal effects in this study. The COD value of effluent of combination process was below 100 mg/L and the total COD removal efficiency was above 90%. The colour was below 6 times and the total color removal efficiency was above 97%. The COD and the colour of outflow could satisfy the professional emission standard (grade-1) (COD≤100 mg/L, color≤40 times) of textile and dyeing industry of PR China (GB4287-92). Therein, the COD removal efficiencies were 50％～65％ and 78％～85％ in ABR and MBR, respectively.The COD removal effiency of MBR was more than that of ABR, while the color was mainly removed in ABR. Besides these,the experiments on the influences of hydraulic retention time (HRT), sludge concentration and aerate intension on COD removal were carried out. The results showed that the fitting HRT, sludge concentration and aeration intension were 8～12 h, 3～8.6 g/L, and 23∶1～31∶1, respectively. -
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