Feasibility of using lysozyme to reduce excess sludge in activated sludge process
Feasibility of using lysozyme to reduce excess sludge in activated sludge process
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利用溶菌酶减少活性污泥法剩余污泥的可行性
DOI：
10.1007/s11771-013-1759-5
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发表时间：
2013-09
影响因子：
4.4
通讯作者：
Luo, Lu
中科院分区：
文献类型：
--
作者：
Song, Yong;Shi, Zhou;Chen, Shi-Yang;Luo, Lu
溶菌酶反应是序批式反应器（SBR）中一种新的污泥减量技术。本研究以SBR系统中的剩余污泥为研究对象，采用溶菌酶反应器处理剩余污泥，然后将剩余污泥回流至反应器中。通过对出水水质和SBR反应器内活性污泥特性的分析，确定了减量工艺的有效性。结果表明，在运行的前30 d，剩余污泥产量几乎可减少到100%，在随后的20 d左右，剩余污泥产量可进一步减少到40%。在此时间段内，化学需氧量和总氮的平均去除率分别为87.38%和52.78%，而出水中的平均总磷比参考系统的出水中的平均总磷高出近17.18%。运行50 d后，污泥絮体粒径在20 ~ 80 μm之间，小于水解前的粒径，混合液挥发性悬浮物/混合液悬浮物的比例从86%增加到90%。
Lysozyme reaction was developed as a novel technique for minimizing the amount of excess sludge in the sequential batch reactor (SBR). In the present work, excess sludge taken from a SBR system was treated by lysozyme reaction and then returned to the reactor. The quality of the effluent water and characteristics of the activated sludge in the SBR were analyzed to determine the effectiveness of the reduction process. The results show that excess sludge production could be reduced to almost 100% in the first 30 d of operation and could be reduced to further by 40% in the succeeding 20 d or so. In these time periods, the average removal efficiencies of the chemical oxygen demand and total nitrogen are 87.38% and 52.78%, respectively, whereas the average total phosphorous in the effluent is nearly 17.18% greater than that of the effluent of the reference system. After 50 d of operation, the sludge floc size is in the range of 20 to 80 μm, which was smaller than the size prior to the start of the hydrolysis and the ratio of mixed liquor volatile suspended solids/mixed liquor suspended solids increases from 86% to 90%.
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