复合式MBR处理化学合成类制药废水研究

采用复合式膜生物反应器（CMBR）对化学合成类制药废水的厌氧反应器出水进行处理研究,系统在不同的水力停留时间（HRT）下,各运行了一段时间,以此寻求最短HRT.实验结果表明,当HRT为10 h和5 h时,进水COD质量浓度在915.9-1 937.5 mg/L之间波动,复合式MBR的出水COD分别为62.5-141.7 mg/L和76.2-149.7 mg/L,COD去除率分别为88.7%-96%和85.7%-94.3%,均可以满足达标排放标准要求（150 mg/L）.当HRT为3 h时,出水COD质量浓度为176.2-291.7 mg/L,不能满足达标排放标准要求.复合式MBR处理化学合成类制药废水的最佳HRT应控制在5 h.污泥质量浓度（MLSS）与COD去除的关系表明,为了得到更好的COD去除率,复合式MBR的最佳MLSS应控制在7 000 mg/L左右.

Research of composite membrane bio-reactor in chemcial synthetic pharmaceutical waste water treatment

A compound membrane bioreactor （CMBR） is introduced to treat the effluent of anaerobic reactor processing chemical synthetic pharmaceutical wastewater in this experiment. This equipment has run for period of time in different hydraulic retention time （HRT） to seek the shortest HRT. The result shows that when the influent COD of CMBR are 915.9 1 937.5 mg/L,the effluent COD of CMBR are 62.5 - 141.7 mg/L and 76.2 - 149.7 mg/ L,the removal rates of COD are respectively 88.7% -96% and 85.7% -94.3% by HRT of 10 h and 5 h,both of them meet the normal standard of discharged domestic sewage. When HRT is 3 h, the effluent COD is 176.2 -291.7 mg/L,it could not meet the normal standard of discharged domestic sewage. The optimum HRT of CMBR is better controlled at 5 h. From the relationship between MLSS and COD, it is found that the optimum MLSS is better controlled at around 7 000 mg/L in CMBR.