%0 Journal Article
%T Effect and Mechanism of Removal of Nitrogen in the Mimic Sewage Using Bio-zeolite System<br>生物沸石床污水脱氮效果及机理
%A Zhang Xi
%A Wu Weizhong
%A Wen Donghui
%A Tang Xiaoyan
%A <br>张曦
%A 吴为中
%A 温东辉
%A 唐孝炎
%J 环境科学
%D 2003
%I 
%X On the spot, the removal effect of pollutants such as NH3-N, N, NO3(-)-N, NO2-(-)N, TN and COD in the mimic sewage by bio-zeolite system was studied. The following results were obtained: it was obvious and stable for the removal of NH3-N by bio-zeolite with a removal efficiency over 95%, but the removal effect of NO3(-)-N was affected deeply by hydraulic retention time, according to the different removal mechanism; chemical adsorption and ion exchange were the main reasons for the removal of NH3-N as well as nitrification by microbe, while denitrification was the main reason for the removal of NO3(-)-N. Nitrification intensity of bio-zeolite was affected by the concentration of dissolved oxygen in the solution, so the nitrification intensity of bio-zeolite on the surface of the zeolite bed was two times of that in the middle in vertical direction. Denitrification intensity changed with different values of C/N in the study, and it could reach the maximum while COD/TN was 5; as for denitrification velocity, it was largest in the first six hour.
%K bio-zeolite
%K chemical adsorption
%K ion exchange
%K nitrification
%K denitrification<br>生物沸石
%K 化学吸附
%K 离子交换
%K 硝化
%K 反硝化
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=C013986D3CD1BBCE&yid=D43C4A19B2EE3C0A&vid=B91E8C6D6FE990DB&iid=94C357A881DFC066&sid=80A07035DF96B0C4&eid=E203FB1A272C9DD2&journal_id=0250-3301&journal_name=环境科学&referenced_num=29&reference_num=7