应用柠檬酸和酶制剂协同减量处理活性污泥  

Reduction of excess activated sludge production by combined citric acid and enzyme treatment

作　　者：张宇[1,2,3] 李明智[1,2,3] 梅荣武[1,2,3] 许青兰[1,2,3] 王慧荣[1,2,3] 韦彦斐[1,2,3] ZHANG Yu LI Mingzhi MEI Rongwu XU Qinglan WANG Huirong WEI Yanfei(Project Research Center, Environmental Science Research and Design Institute of Zhejiang Province,Hangzhou 310007, China Key Laboratory of Environmental Pollution Control Technology of Zhejiang Province, Hangzhou 310007, China Zhejiang Huanke Environmental Research Institute Co. Ltd. ,Hangzhou 310007,China)

机构地区：[1]浙江省环境保护科学设计研究院工程研究中心,杭州310007 [2]浙江省环境污染控制技术研究重点实验室,杭州310007 [3]浙江环科环境研究院有限公司,杭州310007

出　　处：《环境工程学报》2017年第3期1947-1952,共6页Chinese Journal of Environmental Engineering

基　　金：浙江省环保科研计划项目(2013B002);浙江省省属科研院所专项项目(2015F50014;2014F10011;2013F10022);浙江省公益技术研究社会发展项目(2013C33021)

摘　　要：活性污泥工艺被广泛的用于处理市政及工业废水,但其弊端就是产生大量剩余污泥。为了开发经济、高效的污泥源头减量技术,利用柠檬酸结合酶制剂(蛋白酶、纤维素和脂肪酶单独或等比例混合)对活性污泥增溶及减量效果进行了研究,摇瓶实验表明柠檬酸处理能使污泥增溶约30%;复合酶制剂能够使污泥浓度减小约33.6%。进一步小试装置中投加柠檬酸和复合酶制剂进行污泥减量实验,结果表明柠檬酸加复合酶协同处理组污泥沉淀性及污泥浓度分别降低24.3%和26.6%,且COD去除效率并未发生明显降低。对污泥进行镜检,发现经柠檬酸和复合酶处理后的污泥形态发生了变化,絮体结构疏松且尺寸变小。The widespread application of the conventional activated sludge treatment process has been employed to deal with a variety of municipal and industrial sewage. However,it also generates a large quantity of excess sludge. To exploit an economical and efficient technology for sludge reduction,we evaluated the effect of solubilization and reduction of activated sludge by a combined treatment using citric acid and enzyme（ protease,cellulose and lipase were added individually or in combination）. The flask test experiments indicated that the solubilization of sludge improved by 30% after the citric acid treatment. The mixture of the three enzymes resulted in a 33. 6% reduction in solids. Further sludge reduction experimentation was conducted using the bench-scale equipment,by adding citric acid and complex enzymes. The results showed that the settleability and concentration of the sludge decreased by 24. 3% and 26. 6%,respectively,while the removal efficiency of COD did not decrease significantly. Through the microscopic observation of sludge,it was found that the sludge morphology had been changed after the citric acid and complex enzyme treatment,with the flocs having a loose structure and small volume.

关 键 词：活性污泥 沉淀性 减量化 柠檬酸 酶处理 

分 类 号：X501[环境科学与工程—环境工程]