Effects of chemical sludge disintegration on the performances of wastewater treatment by membrane bioreactor.
Effects of chemical sludge disintegration on the performances of wastewater treatment by membrane bioreactor.
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DOI：
10.1016/j.watres.2007.02.028
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发表时间：
2007-06
期刊：
影响因子：
12.8
通讯作者：
Y. Oh;Ki-Ryong Lee;K. Ko;I. Yeom
中科院分区：
文献类型：
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作者：
Y. Oh;Ki-Ryong Lee;K. Ko;I. Yeom
研究了膜生物反应器（MBR）与化学污泥分解相结合的污水处理新工艺。着重研究了解体处理对MBR剩余污泥产率的影响。2台mbr手术。在一个反应器中，部分混合液经NaOH和臭氧气体连续处理后返回生物反应器。污泥分解流的流量为进水流量的1.5%。在200天的运行过程中，经过解体处理的生物反应器内MLSS水平保持在10,000-11,000mg /L的相对恒定范围内，而在不进行解体处理的情况下，MLSS水平稳步上升至25,000mg/L。在污泥解体的MBR中，跨膜压力（TMP）可以维持相对恒定6个月以上，而未解体的MBR在运行后期TMP突然增加。综上所述，完全控制膜耦合生物反应器中多余污泥的产生是可能的，而不会显著恶化处理后的水质和膜性能。
A new wastewater treatment process combining a membrane bioreactor (MBR) with chemical sludge disintegration was tested in bench scale experiments. In particular, the effects of the disintegration treatment on the excess sludge production in MBR were investigated. Two MBRs were operated. In one reactor, a part of the mixed liquor was treated with NaOH and ozone gas consecutively and was returned to the bioreactor. The flow rate of the sludge disintegration stream was 1.5% of the influent flow rate. During the 200 days of operation, the MLSS level in the bioreactor with the disintegration treatment was maintained relatively constant at the range of 10,000–11,000mg/L while it increased steadily up to 25,000mg/L in the absence of the treatment. In the MBR with the sludge disintegration, relatively constant transmembrane pressures (TMPs) could be maintained for more than 6 months while the MBR without disintegration showed an abrupt increase of TMP in the later phase of the operation. In conclusion, a complete control of excess sludge production in the membrane-coupled bioreactor was possible without significant deterioration of the treated water quality and membrane performances.