利用蚯蚓活动改善污泥性状的实验研究  

EXPERIMENT STUDY ON IMPROVING PROPERTIES OF SLUDGE UTILIZING EARTHWORMS ACTIVITY

作　　者：孙颖[1] 桂长华[1] 孟杰[2] 钱光人[1] 

机构地区：[1]上海大学环境与化学工程学院,上海200072 [2]东华工程科技股份有限公司,合肥230024

出　　处：《环境化学》2007年第3期343-346,共4页Environmental Chemistry

基　　金：上海市教委青年教师基金项目(04AC101);长江水环境教育部重点实验室开放基金(YRWEF06008).

摘　　要：利用赤子爱胜属蚓(俗称红蚯蚓)的活动来改善污泥性状,研究了污泥酸碱性的改变、有机物的降解、浸出毒性的减小和肥效的改善情况.结果表明,蚯蚓处理后污泥的弱碱性得到中和,趋向于中性;污泥COD的降解率达到25.36%,有机质降为44.10%,浸出毒性明显减小;污泥总氮含量大幅增加,肥效得到提高.污泥水溶性有机碳含量大幅减小.Earthworms （E.fetida） were utilized to improve properties of sludge. The change of organic indexes, fertilizer indexes and hazard waste indexes of sludge were investigated during vermicomposting process to study application probability of E. fetida in vermicomposting of sludge. Results show that the vermicomposting process is successful, which lead to the reduction of the toxicity concentration of heavy metal in leaching procedure and therefore the potential harm in sludge farmland is reduced. The organic matter in sludge decreases to 44. 10%, and the rate of COD uptaken up to 25.36%. The content of total nitrogen increases a little while the content of water-soluble organic carbon decreases to 0. 22 mg·kg^-1 and the value of pH is close to 7.0.

关 键 词：蚯蚓 污泥 有机物 

分 类 号：X703[环境科学与工程—环境工程]