摘要：

采用体积为3 L的SBR反应器，通过投加NaNO₂的方式调节反硝化初始NO^-₂  -N为20 mg N·L^-1，同时，投加0、0.05、0.1、0.2 ml乙醇调节初始碳氮比（C/N）分别为1.8、2.5

Abstract:

The effect of C/N ratio on kinetics of nitrite denitrification，as well as the corresponding N₂O accumulation and reduction were investigated in a 3 L sequencing batch reactor. The initial 20 mg N·L^-1 NO^-₂ -N was obtained by adding NaNO₂. The C/N ratios 1.8，2.5，3.2 and 4.5 were reached by adding 0，0.05，0.1，0.2 ml ethanol respectively. The highest N₂O accumulation was 333、200、245 and 256 μmol·L^-1 for each C/N ratio. The nitrite reduction and N₂O production rate increased with the increase of C/N ratio.  The reduction rate of N₂O was about 35—