%0 Journal Article
%T Variation of functional bacteria during start-up and operation of partial nitrification process<br>短程硝化启动运行中功能菌群变化研究
%A CHEN Xiao-Xuan
%A LIU Chun
%A YANG Jing-Liang
%A ZHANG Run
%A YANG Hui-Na
%A <br>陈晓轩
%A 刘春
%A 杨景亮
%A 张润
%A 杨辉娜
%J 微生物学通报
%D 2012
%I 
%X Objective] Partial nitrification-anammox is considered as the shortest?process for biological nitrogen removal and partial nitrification is the important part of this process. Methods] The variation of functional bacteria during start-up and stable operation of partial nitrification process was investigated in a SBR bioreactor in this study. Results] The results indicated that ammonia-oxidizing bacteria (AOB) population was expanded significantly and nitrite-oxidizing bacteria (NOB) population was inhibited when DO concentration was controlled lower than 1 mg/L and ammonia loading of the influent increased gradually. As a result, start-up and stable operation of partial nitrification process was realized. When ammonia volumetric loading of the influent was 0.055 kg/(m3·d), the average ammonia removal volumetric loading and sludge loading were 0.043 kg/(m3·d) and 0.16?kg/(kg·d), respectively. In addition, the average nitrite accumulation rate was 83.4% at this time. AOB population density and relative abundance increased from 4.5×104 CFU/mL to 1.5×107CFU/mL and from 0.18% to 7.25%, respectively, during start-up and stable operation of partial nitrification process. At the same time, NOB population density and relative abundance decreased from 2.0×105 CFU/mL to 1.5×104 CFU/mL?and from 5.51% to 2.14%, respectively. Conclusion] The expansion of AOB population was responsible for realization of partial nitrification and ammonia removal. High ammonia concentration and loading?also caused the activity inhibition of partial nitrification.
%K Partial nitrification
%K AOB population
%K NOB population<br>短程硝化
%K AOB菌群
%K NOB菌群
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=78024727B5F4EF6AA9CA8E605B5FC464&aid=C8C3724E4E2B01E6A12AD3942E7BE057&yid=99E9153A83D4CB11&vid=7C3A4C1EE6A45749&iid=94C357A881DFC066&sid=331A060E6E0B9F9E&eid=4EB1667BB16584DD&journal_id=0253-2654&journal_name=微生物学通报&referenced_num=0&reference_num=0