摘要
设有分水装置的复合地下渗滤对氮有较好的去除效果,当进水TN在28.34～ 50.82 mg/L时,系统对NH3＋-N去除率为76.76％,TN去除率为64.33％.该系统内氨化菌、硝化菌、亚硝化菌等自养菌在各级渗滤床上部分布均匀且处于较高数量级（105～ 106 MPN/g）,二级渗滤床内反硝化菌明显高于一级渗滤床,其数量106～107 MPN/g.各级渗滤床中氮转化菌分布和ORP测定结果表明该系统具有较好的硝化-反硝化环境条件,其中影响脱氮效果的主要因素是N/C和Nv.
Nitrogen can be well removed in the complex wetland system with water diversion devices. When TN is 28.34～50. 82 mg/1 in the inflow,the removal rate for NH3-N is 76.76 % and 64.33 % for TN. In this system,the autotrophic bacteria such as ammoniation bacteria, nitrifying bacteria and nitrosomonas are distributed evenly at all levels of the wetlands and are on high magnitude （ 105 ～ 106 MPN/g）. The quantity of denitrifying bacteria in the secondary wetland is 106 ～ 107 MPN/g, which is higher than that in the primary wetland. The distribution of nitrogen transforming bacteria at all levels of wetland and the result of oxidation-reduction potential （ORP） indicate that this system has good environmental conditions for nitrification-denitrification. N/C and Nv are an important factor to affect denitrification.
出处
《贵州科学》
2014年第3期25-29,51,共6页
Guizhou Science
基金
贵州省科技厅(黔科合体改字〔2001〕6014号)地沟式污水生态工程处理及回用技术研究
关键词
地下渗滤
氮转化细菌
硝化-反硝化
complex wetlands system, nitrogen transforming bacteria, nitrification-denitrification
