【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NH+3-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。更多还原

【Abstract】 Nitrogen can be well removed in the complex wetland system with water diversion devices.When TN is28.34 ~ 50.82 mg /l 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.更多还原