%0 Journal Article
%T Achieving the Stability of Nitrosation Under Low DO Concentration<br>控制低溶解氧实现亚硝化的稳定性
%A DU He
%A LI Dong
%A ZHOU Chuan
%A LIANG Yu-hai
%A WANG Man
%A YUAN Peng-fei
%A JIANG Song
%A ZHANG Jie
%A <br>杜贺
%A 李冬
%A 周川
%A 梁瑜海
%A 王曼
%A 袁朋飞
%A 姜松
%A 张杰
%J 环境科学
%D 2010
%I 
%X With A/O phosphorus removal process of secondary effluent as raw water, the stable accumulation of nitrite was achieved under low DO. Total nitrogen loss, hydraulic retention time (HRT) and sludge recycle ratio(R) was separately studied on the effects of stable nitrosation. According the result, apparent nitrosation rate was affected by the concentration of COD influence, when COD < or = 50 mg/L, apparent nitrosation rate was reduced; when COD > 50 mg/L, it was increased. Extension and shortening of HRT has positive and negative effects on nitrosation efficiency, dynamic controlling was an effective method. The system stability would be undermined leading to the risk of nitrification by elevating sludge recycle ration. In addition, low DO concentration did not reduce nitrosation rate. Under the condition of HRT = 6 h, R = 0.5, T = 22-24 degrees C, the average ammonia nitrogen removal rate reached 83%, the ammonia nitrogen removal load reached 0.28 kg/(kg x d), the nitrite accumulation ratio was close to 100%.
%K stability of nitrosation
%K low DO
%K total nitrogen loss
%K hydraulic retention time
%K sludge recycle ratio
%K efficiency of nitrosation<br>稳定亚硝化
%K 低溶解氧
%K 总氮损失
%K 水力停留时间
%K 回流比
%K 亚硝化效率
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=F864F16759EBC1DE8CB9444C8CA57234&yid=140ECF96957D60B2&vid=4AD960B5AD2D111A&iid=F3090AE9B60B7ED1&sid=C61A07EE083A0198&eid=D0540156A5D11138&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=0