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180 d的对比试验。其中一个SBR长期投加1.0 mg/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35 d后,反硝化速率逐渐恢复到原来的水平。DEHP对NO-3-N和NO-2-N还原速率的影响程度不同,从而导致反硝化过程中NO-2-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。
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.
出处
《中国给水排水》
CAS
CSCD
北大核心
2014年第11期39-42,47,共5页
China Water & Wastewater
基金
国家自然科学基金资助项目(51178006)
北京市属高等学校高层次人才引进与培养计划项目(CIT&TCD201304055)
