中文摘要：

从农药厂废水处理池的活性污泥中分离到1株能以甲氰菊酯为唯一碳源生长的细菌。命名为JQL4-5．根据其生理生化特征和16SrDNA（GenBank Accession No．DQ177525）序列相似性分析，将该菌株鉴定为鞘氨醇单胞菌属（Sphingomonas sp.）．该菌株在24h内对20mg／L的甲氰菊酯的降解率达到99．8％．降解甲氰菊酯的最适温度为30℃，pH为7．0，降解速率与初始接种量呈正相关．酶的定域试验表明，降解甲氰菊酯的酶为胞内酶．

英文摘要：

A bacterium capable of utilizing fenpropathrin as sole carbon .source was isolated from activated sludge collected from wastewater-treating system of a pesticide manufacturer. This bacterium was identified as Sphingomonas sp. according to its physiological ＆ biochemical analysis and the similarity analysis of its 16S rDNA sequence （GenBank Accession No. DQ177525）. This bacterium could degrade 99.8% of 20mg/L fenpropathrin in 24h. The optimal pH and temperature for the degradation were 7.0 and 30℃, respectively. The degradation speed was related positively to initial inoculum size. The enzyme distribution experiment showed that the degrading-enzyme in the bacterium was endoenzyme.