颤蚓污泥减容效果及其影响因素分析  

Factors affecting sludge volume reduction induced by Tubificidae

作　　者：诸晖[1] 魏源送[1] 杨宇[1] 王亚炜[1] 刘俊新[1] 

机构地区：[1]中国科学院生态环境研究中心,北京100085

出　　处：《环境科学学报》2008年第6期1141-1148,共8页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金(No.5040821);国家高技术研究发展计划项目(No.2007AA06Z347)~~

摘　　要：通过批沉降实验考察了颤蚓对一系列来源不同、性质不同的活性污泥沉降性能的影响.结果表明,颤蚓污泥减容效果显著.对活性污泥的主要性质指标进行Pearson偏相关分析后,发现污泥本身的污泥沉降比(SV,亦称30min沉降率)和半沉降时间t50是影响颤蚓污泥减容作用的重要因素,而并非污泥浓度TSS和SVI.其中,SV分别与颤蚓作用60min后的污泥减容率η(SV60)及污泥半沉降时间的减少率η(t50)之间显著相关.另外,在污泥性质相同的情况下,颤蚓污泥容积比也是影响颤蚓污泥减容效果的重要因素,单位容积下颤蚓投加量越大,污泥减容率会越高.Batch settling tests with several kinds of sludge from diverse sources showed a significant sludge volume reduction induced by Tubificidae. Among the major factors reflecting sludge settling characteristics, Pearson analysis showed that the ratio of settling volume （SV） percentage at 30 min and half settling time （ t50 ） of raw sludge were two key factors affecting the sludge volume reduction induced by Tublficidae. Particularly, SV showed significant linear correlations with the rate of reduction of sludge volume at 60 min （η（ SV60 ） ） and the half settling time （η（t50） ） after the inoculation of Tubificidae. In addition, for the same raw sludge, the inoculation dose of worms per unit volume also plays an important role in the sludge volume reduction. The more Tubificidae inoculated, the more the sludge volume was reduced.

关 键 词：颤蚓 污泥减容 Pearson偏相关分析 污泥沉降比 

分 类 号：X703[环境科学与工程—环境工程]