%0 Journal Article
%T Effect of C/N Ratio on Nitrous Oxide Production During Denitrification with Different Electron Acceptors<br>不同电子受体反硝化过程中C/N对N2O产量的影响
%A SHANG Hui-lai
%A PENG Yong-zhen
%A ZHANG Jing-rong
%A WANG Shu-ying
%A <br>尚会来
%A 彭永臻
%A 张静蓉
%A 王淑莹
%J 环境科学
%D 2009
%I 
%X The experiment investigated the nitrous oxide production under different C/N ratios during denitrification, taking nitrate and nitrite as electron acceptor respectively. Ethanol was selected as carbon source. The C/N ratios were 0, 1.2, 2.4, 3.5, 5.0 and 20 when nitrate was taken as electron acceptor and C/N ratios 0, 1.8, 2.4, 3.0, 4.3, 5.2, 6.6, 20.6 when electron acceptor was nitrite. The results indicated that: the optimum C/N ratio was 3.0 taking nitrite as electron acceptor and the N_2O production was 0.044 mg·L~(-1) ;the optimum C/N ratio was 5.0 taking nitrate as electron acceptor and the N_2O production was 0.135 mg-L~(-1) which was 3 times higher than that of nitrite as electron acceptor. Though the electron acceptor changed, the trend of N_2O production was similar: when carbon source was badly insufficient, the production of N_2O and denitrification rate were both quite small; the N_2O production increased with the increasing of the quantity of carbon source; when the carbon source was excessive, the N_2O production sharply raised. Consequently, compared to complete nitrification and denitrification, short-cut nitrification and denitrification could save 40% carbon source. Moreover, controlling C/N = 3 could reduce the production of N_2O in short-cut nitrification.
%K denitrification
%K nitrate
%K nitrite
%K C/N ratio
%K nitrous oxide<br>反硝化
%K 硝酸盐
%K 亚硝酸盐
%K C/N
%K 氧化亚氮
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=D3D186FD7D86F1B395C7B9444D25C5F2&yid=DE12191FBD62783C&vid=340AC2BF8E7AB4FD&iid=DF92D298D3FF1E6E&sid=A732AF04DDA03BB3&eid=99E9153A83D4CB11&journal_id=0250-3301&journal_name=环境科学&referenced_num=3&reference_num=16