| In order to use biological methods to remove nitrogen oxides in flue gas effectively,the denitrification process of the suspension bioreactor had been explored,and the optimum process conditions for the denitrification reaction of bacteria H1 in the reactor had been confirmed.The effects of carbon sources,temperature,pH vale,sulphate and ferrite on the denitrification performance of the reactor had been analyzed.When the temperature was 30?,the nitrogen removal efficiency of the bacteria H1 in the reactor was highest,which was 94.3%.When the glucose was added as carbon sources,the denitrification efficiency of the bacteria H1 in the reactor was higher,which was 96.1%.The optimum pH value of the denitrification reaction of the bacteria H1 in the reactor was 7.5.The addition of proper concentration of sulfate solution and ferrous salt solution could improve the denitrification performance of the bacteria H1 in the reactor.Under the optimum process conditions,the dynamic features of the bacteria H1in the reactor had been explored.The kinetic features of the denitrification reaction of the bacteria H1 in the reactor conformed to the first-order kinetic model.When the air flow rate was 0.1m3/h,the carbon source was glucose and the temperature was 30?,the reaction rate K of the denitrification reaction of bacteria H1 in the reactor was bigger.Its denitrification activity could be recovered by increasing the aeration volume and adding the fresh bacteria,and the recovery time was about four hours.Based on the M-M equation and the experimental date,the kinetic equation of the denitrification reaction of bacteria H1 in the reactor was established.The suspension bioreactor studied in this paper can use the aerobic denitrification bacteria H1 for high efficiency denitrification.Confirming the optimum conditions of the denitrification reaction will provide a basis for the practical application of the experimental device used for removing nitrogen oxides in flue gas. |
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