The study on the degradability of two chlorpyrifos degrading bacteria from two different sources

摘要

In this study, the chlorpyrifos degradation differences of two degrading bacteria from two sources are measured and analyzed, one is X1, cultivated and isolated from the sludge of a city sewage treatment plant; the other comes from the long-term chlorpyrifos contaminated soil, named D. The results show that: the two degrading bacteria do not inhibit each other, degradation capacity of strain D is slightly stronger that the X1; the optimum temperature for degradation of the two strains are all 30°C, the requirements of the pH value is different, the X1 is in acidic and alkaline conditions while the strain D is in the neutral condition; the best addition of agent of X1 is 2mL and the D is 3mL; external carbon source on degradation of the two strains have a certain inhibitory effect, but nitrogen can promote; all the 10 tested metal ions inhibit the degradation ability of the two strains.