氮磷比对三维电极/生物膜反应器反硝化效果的影响  

Effect of N/P Ratio on Denitrification Efficiency of Three-dimensional Electrode/Biofilm Reactor

作　　者：姚静华[1] 赵国智[1] 田光明[1] 张建华[1] 徐文江[2] 

机构地区：[1]浙江大学环境工程系,浙江杭州310058 [2]北京市环境保护科学研究院,北京100037

出　　处：《中国给水排水》2012年第1期7-10,共4页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07317-008-06)

摘　　要：研究了连续流三维电极/生物膜反应器在不同氮磷比(N/P)下的反硝化性能。结果表明:N/P值对去除NO3--N的影响不大,但对出水NO2--N浓度有明显影响。在N/P值由5∶1增大至100∶1的过程中,对NO3--N的去除率介于59.2%～71.6%之间。当N/P值为10∶1时,对NO3--N的去除率最高达到了71.6%,出水NO3--N为8.53 mg/L。当N/P值为10∶1时,出水NO2--N浓度最低为0.27 mg/L;当N/P值为100∶1时NO2--N的积累最为严重,NO2--N生成量最高达到了1.76 mg/L。N/P值还对NH4+-N的产生有明显影响,N/P值从5∶1增至100∶1的过程中,NH4+-N生成量由4.50 mg/L逐渐减小至0.26 mg/L。当N/P值为(5∶1)～(50∶1)时,反应器具有较好的除磷功能;但当N/P值为100∶1时,出水TP浓度高于进水TP浓度。The denitrification performance of three-dimensional electrode/biofilm reactor was tested at different N/P ratios. The results show that the removal efficiency of NO3^- - N is not significantly affected by the N/P ratios, however, the NO2^- -N concentration in the effluent is obviously influenced by this parameter. When the N/P ratio is between 5 ： 1 and 100 ： 1, the removal rate of NO3^- - N is between 59.2% and 71.6%. The highest removal rate of NO3^- - N reaches 71.6% at the N/P ratio of 10 ： 1, with NO3- - N concentration of 8.53 mg/L in the effluent. The lowest NO2^- - N concentration in the effluent reaches 0.27 mg/L at the N/P ratio of 10 ： 1. The accumulation of NO2^- - N is especially serious when the N/P ratio is 100 ： 1, with the NO2^- - N generation of 1.76 mg/L. The N/P ratio also has a significant effect on NH4^＋ - N generation. When the N/P ratio is increased from 5 ： 1 to 100 ： 1, the generation of NH4^＋- N is decreased from 4.50 mg/L to 0.26 mg/L. The three-dimensional electrode/biofilm reactor shows a good capability for phosphorus removal when the N/P ratio is between 5 ： 1 and 50 ： 1. However, TP concentration in the effluent is higher than that in the influent at the N/P ratio of 100 ： 1.

关 键 词：氮磷比 三维电极/生物膜反应器 反硝化 

分 类 号：X703[环境科学与工程—环境工程]