%0 Journal Article
%T Impact of Different Nitrogen Concentrations on the N2 O Production in the Denitrification Process of Granular Sludge<br>不同氮浓度冲击对颗粒污泥脱氮过程中N2 O产生量的影响
%A HAN Xue
%A GAO Da-wen
%A <br>韩雪
%A 高大文
%J 环境科学
%D 2013
%I 
%X The aerobic-anoxic SBR biological wastewater treatment systems were used to examine the impact of different influent NH4+-N concentrations on the release of N2 O 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·L-1 to 40 mg·L-1,60 mg·L-1 and 80 mg·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·L-1 in all cases; in addition, there was little influence of influent NH4+-N on the N2 O production, under the four different influent NH4+-N concentrations, the N2 O production in a typical cycle was 3.019 mg·m-3, 3.489 mg·m-3, 3.271 mg·m-3, and 3.490 mg·m-3, respectively, and the N2 O emission rates were all around 0.0045 mg·(m3·min)-1. N2 O 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.
%K N2 O production
%K impact of the nitrogen concentration
%K granular sludge
%K simultaneous nitrification and denitrification (SND)
%K SBR<br>N2
%K O产生量
%K 氮浓度冲击
%K 颗粒污泥
%K 同步硝化反硝化
%K SBR
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=9C65539B20E123FC7A2CFD70BA032A20&yid=FF7AA908D58E97FA&vid=339D79302DF62549&iid=CA4FD0336C81A37A&sid=02DC3A182A5530DF&eid=3D9746C06EC12B45&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=24