Study on Degradation Kinetics of Low-temperature Nitrobenzene Degrading Bacteria

[Objective] The research aimed to study degradation kinetics of low-temperature nitrobenzene degrading bacteria. [Method] The optimal growth condition of low-temperature nitrobenzene degrading bacteria,and its growth and degradation situations under different initial concentrations of nitrobenzene were inspected,and its degradation kinetics was studied. [Result] Under the condition of temperature 15 ℃,p H 7,rotation speed 140 r / min and inoculum amount 10%,it was optimal for the bacteria growth. After cultivated for 48 h,degradation rate of 200 mg / L nitrobenzene by the bacteria reached 60. 53%. When initial nitrobenzene concentration was more than 100 mg / L,degradation kinetics of the bacteria corresponded to Andrews inhibition equation- non-competitive substrate inhibition model. [Conclusion] The research could provide theoretical basis for biological treatment of actual nitrobenzene wastewater.