中文摘要：

为研究邻苯二甲酸二（2-乙基己基）酯（DEHP）对反硝化的影响及其去除情况，采用两个SBR进行了180d的对比试验。其中一个SBR长期投加1．0mg／L的DEHP，另一个SBR作为空白对照。对SBR内的污泥进行批次试验，结果发现DEHP对反硝化反应具有抑制作用。虽然DEHP会使反硝化速率降低，但只要反应时间足够，反硝化反应仍可以彻底完成。DEHP对反硝化的抑制可以恢复，驯化35d后，反硝化速率逐渐恢复到原来的水平。DEHP对NO3^--N和NO2^--N还原速率的影响程度不同，从而导致反硝化过程中NO2^--N积累峰值增加。无论是否经过DEHP驯化，反硝化污泥对DEHP的去除率均在90％以上。

英文摘要：

To study the effect of di （2-ethylhexyl） phthalate （DEHP） on the denitrification process and its removal, two denitrification sequencing batch reactors （SBR） were operated for 180 d. One of them was fed with 1.0 mg/L DEHP and the other was not. Batch denitrifieation tests were implemented at irregular intervals during 180 d. All results showed that denitrification activities were inhibited by DEHP addition. If the reaction time was enough, denitrifieation could be completed thoroughly. Denitrification activities recovered after 35 d of DEHP addition, which indicated that the inhibition effect of DEHP on denitrifieation was not constant. Nitrite reduction was more susceptible to DEHP than nitrate reduction, thus resulted in a high nitrite accumulation during the denitrifieation with DEHP addition. DEHP removal efficiency was more than 90% in each SBR whether or not with DEHP addition.