【摘要】 构建了基于包埋硝化颗粒和以废弃玉米芯为缓释碳源的包埋硝化/碳源缓释耦合脱氮反应器,以强化硝化反硝化生物脱氮性能,并充分利用硝化细菌的共代谢作用去除雌激素。在反硝化单元中,碳源柱的反硝化速率常数为0. 129 8,是沸石对照柱(0. 058 6)的2. 22倍。在10～15℃时耦合反应器对TN的去除率≥70. 28%,出水TN浓度≤10. 4 mg/L,出水COD≤31. 22 mg/L。通过硝化细菌的共代谢作用以及包埋颗粒和滤料的物理吸附作用,耦合反应器对雌酮(E1)、17β-雌二醇(E2)、17α-乙炔基雌二醇(EE2)的去除率可分别稳定在60%、90%和80%以上。更多还原

【Abstract】 In order to enhance nitrification-denitrification biological nitrogen removal as well as remove steroid estrogens via co-metabolism of nitrifying bacteria,a novel nitrogen removal reactor was developed using immobilized nitrobacteria pellets coupled with denitrification filter using discarded corncob as slow-release carbon source. The denitrification rate constant of carbon source column( Km=0. 129 8) was 2. 22 times of zeolite column( Km= 0. 058 6). The removal rate of TN in coupling reactor was above 70. 28%,and its concentration in the effluent was below 10. 4 mg/L at 10-15 ℃.Meanwhile,the concentration of COD in effluent was below 31. 22 mg/L. The removal rates of E1,E2 and EE2 were above 60%,90% and 80% respectively,resulting from the co-metabolism by nitrifying bacteria or the adsorption of immobilized particle and filter.更多还原