Han Xue, Gao Da-Wen
School of Forestry, Northeast Forestry University, Harbin 150040, China.
Huan Jing Ke Xue. 2013 Jan;34(1):204-8.
The aerobic-anoxic SBR biological wastewater treatment systems were used to examine the impact of different influent NH4(+) -N concentrations on the release of N2O and nitrogen removal in the simultaneous nitrification and denitrification of granular sludge. The results showed that when the influent NH4(+) -N concentration suddenly increased from the stable concentrations of 30 mg x L(-1) to 40 mg x L(-1), 60 mg x L(-1) and 80 mg x L(-1), the ammonia removal rate decreased from 80.04% to 61.40%, 39.65% and 31.02%, respectively, however, the ammonia nitrogen removal amount underwent little change, being about 25 mg x L(-1) in all cases; in addition, there was little influence of influent NH4(+) -N on the N2O production, under the four different influent NH4(+) -N concentrations, the N2O production in a typical cycle was 3.019 mg x m(-3), 3.489 mg x m(-3), 3.271 mg x m(-3), and 3.490 mg x m(-3), respectively, and the N2O emission rates were all around 0.0045 mg x (m3 x min)(-1). N2O was produced in both the aerobic stage and anoxic stage of the granular sludge simultaneous nitrification and denitrification system. Under different influent NH4(+) -N concentrations, the amount of NH4(+) -N removal by the granular sludge simultaneous nitrification and denitrification system was not changed, but significant decrease in nitrogen removal rate was observed with the increase in the influent NH4(+) -N concentration.
采用好氧-缺氧序批式活性污泥法（SBR）生物废水处理系统，研究了不同进水NH4(+) -N浓度对颗粒污泥同步硝化反硝化过程中N2O释放及氮去除的影响。结果表明，当进水NH4(+) -N浓度从稳定的30 mg·L(-1) 突然增至40 mg·L(-1)、60 mg·L(-1) 和80 mg·L(-1) 时，氨去除率分别从80.04% 降至61.40%、39.65% 和31.02%，然而，氨氮去除量变化不大，在所有情况下均约为25 mg·L(-1)；此外，进水NH4(+) -N对N2O产生的影响较小，在四种不同进水NH4(+) -N浓度下，一个典型周期内的N2O产量分别为3.019 mg·m(-3)、3.489 mg·m(-3)、3.271 mg·m(-3) 和3.490 mg·m(-3)，N2O排放速率均在0.0045 mg·(m3·min)(-1) 左右。颗粒污泥同步硝化反硝化系统的好氧阶段和缺氧阶段均有N2O产生。在不同进水NH4(+) -N浓度下，颗粒污泥同步硝化反硝化系统对NH4(+) -N的去除量不变，但随着进水NH4(+) -N浓度的增加，氮去除率显著降低。
