论文部分内容阅读
为筛选分解高效氯氰菊酯的优良菌株,试验从活性污泥中分离出5株菌株,均能一定程度地降解高效氯氰菊酯。通过液相色谱分析,菌株XCH-5降解高效氯氰菊酯的能力最强。观察该菌株的形态学特点,再结合测序分析,可鉴定XCH-5菌株为栖土曲霉。利用正交法优化降解条件,得出该菌株在最优水平组合为接种量0.2 g/L、温度35℃、p H7.5的情况下,10 d对200 mg/L高效氯氰菊酯的降解率可达到78%。
In order to screen excellent strains that decompose beta-cypermethrin, five isolates were isolated from activated sludge, which could degrade beta-cypermethrin to some extent. By liquid chromatography, strain XCH-5 has the strongest ability to degrade beta-cypermethrin. Morphological characteristics of the strain were observed. Combined with sequencing analysis, XCH-5 strain was identified as Aspergillusumum. The degradation conditions of 200 mg / L beta-cypermethrin were optimized by orthogonal test. The results showed that the optimum degradation rate of 200 mg / L beta-cypermethrin was 10 d after inoculation amount 0.2 g / L, temperature 35 ℃, Reached 78%.