SFBR工艺顺序进行硝化和反硝化的动力学研究

采用序半连续式反应器(sequencing fed-batch reactor,简称SFBR)对人工合成废水顺序地进行硝化和反硝化动力学进行了研究.硝化和反硝化所用微生物为活性污泥.反应器在不同的操作条件进行操作,获得了用于确定动力学常数的数据;获得动力学参数um=0.05 h-1,KNO=2.0 mg/L,y=0.47 mg X/mg N,a=0.001 h-1.类似地确定了反硝化动力学参数kD=0.01 h-1和KD,NO=0.4 mg/L.在一定范围内硝化和反硝化速率随着氨浓度和硝酸盐浓度的增加而增加.实验数据表明,硝化和反硝化的动力学符合Monod动力学方程.

Study on kinetics of sequencing nitrification and denitrification in SFBR process

The kinetics of sequencing nitrification and denitrification of synthetic wastewater using sequential fed-batch reactor was studied.An activated sludge is as microorganism for nitrification and denitrification.Reactor was operated at different operating conditions and data were obtained for determination of kinetic constants.The kinetic constants for nitrification were obtained: u_m=0.05 h~(-1),K_(NO)=2.0 mg/L,Y=0.47 mg X/mg N and a=0.001 h~(-1) on the base of experiment.Similarly,kinetic constants for denitrification were obtained:k_D=0.01 h~(-1) and K_(D,NO)=0.4 mg/L.Rates of nitrification and denitrification increased with increasing ammonium and nitrate concentrations.Experimental data indicated that nitrification and denitrification kinetics followed Monod kinetics.