中文摘要：

为探究邻苯二甲酸二（2-乙基己基）酯（DEHP）对硝化反应的影响及其去除情况,采用2座下向流硝化型曝气生物滤池进行对比实验。其中一座滤池进水DEHP浓度为100μg/L,另一座滤池进水中不添加DEHP作为空白对照。对比实验期间氨氮负荷先后调整为0.6 kg NH4^--N/（m^3·d）和1.5 kg NH4^--N/（m^3·d）2个工况。通过60 d的对比实验,结果发现,2种工况下进水加DEHP的滤池,出水亚氮积累率分别为83.92%和80.71%,氨氮去除率分别为97.52%和49.39%;进水不加DEHP的滤池,出水亚氮积累率分别为64.15%和49.37%,氨氮去除率分别为98.77%和49.34%。DEHP的加入均促进了滤池出水中亚氮的积累,但对氨氮的去除不产生影响。进水加DEHP的滤池在0.6 kg NH4^--N/（m^3·d）氨氮负荷下运行时,氨氮去除率沿水流方向逐渐提高,在滤床深度为1 400 mm处达到98.40%。亚氮积累率沿水流方向呈现先升高后降低的趋势,在滤床800 mm处达到最高值94.21%。在2个工况条件下,下向流硝化型曝气生物滤池对DEHP的平均去除率分别为91.71%和89.38%。大部分DEHP是在滤池进水端200 mm之内去除的。

英文摘要：

To study the effects of di（ 2-ethylhexyl） phthalate（ DEHP） on nitrification and its removal,two biological aerated filters were operated in parallel for 60 days. One filter＇s influent was with 100 μg/L DEHP while the other＇s was not. The two filters were run with the same ammonia loadings of 0. 6 and 1. 5 kg NH4^--N/（m^3·d） successively. All results showed that,nitrite accumulation ratio in effluent reached 83. 92% and80. 71%,and ammonia nitrogen removal efficiency reached 97. 52% and 49. 39% respectively under the two ammonia loadings for the filter fed with 100 μg/L DEHP. For the filter without DEHP adding,nitrite accumulation ratio in effluent were 64. 15% and 49. 37%,and the ammonia nitrogen removal efficiency were 98. 77% and49. 34% respectively. DEHP in influent accelerates the nitrite accumulation but has no negative effects on ammonia removal. For the filter with DEHP in influent under the ammonia loading of 0. 6 kg NH4^--N/（m^3·d）,percent of ammonia removal increased gradually along the flow direction and reached 98. 40% at the filter bed depth of 1 400 mm. Nitrite accumulation ratio increased gradually and then decreased along the flow direction with the maximum accumulation ratio of 94. 21% reached at the filter bed depth of 800 mm. The DEHP average removal efficiencies were 91. 71% and 89. 38% respectively under the two ammonia loadings. Most DEHP removal occurred in the initial 200 mm filter bed.