中文摘要：

为避免序批式活性污泥法（SBR）工艺生物脱氮反硝化过程毒性更大的亚硝态氮（NO2--N）排入受纳水体,以缺氧/厌氧上流式厌氧污泥流化床（UASB）预处理的实际垃圾填埋场渗滤液为研究对象,考察了以氧化还原电位（ORP）作为SBR反硝化过程NO2--N积累控制参数的可行性.结果表明：对于4种不同N初始的ρ（NO3--N）,NO 2--N均实现明显积累,积累速率分别为0.117、0.136、0.235、0.068/d.反应过程中,ORP曲线先后出现NO 3--N和NO 2--N拐点,表明硝态氮和亚硝态氮还原反应结束.对于有明显亚硝态氮积累的反硝化过程,仅以NO 3--N作为反硝化速率（rDN）的单值函数是不准确的,应以总氧化态氮计,如以NO 3--N作为底物,将其定义为＂名义＂rDN.温度分别为14.2、13.9℃低温,5种不同n（C）/n（N）条件下,亚硝态氮均积累,亚硝态氮峰值点为速率平衡点.当n（C）/n（N）低于理论值时,相对NOx--N→N2的全程反硝化碳源不充足,但相对于NO3--N→NO2--N的转化碳源充足.

英文摘要：

In order to avoid the discharge of nitrite into the receiving water body,the feasibility of using the oxidation reduction potential （ ORP） as control parameters for nitrite accumulation in SBR denitrification for the treatment of leachate via anoxic/anaerobic UASB,was investigated. Experimental results show that under the four different initial NO 3- -N concentration used, nitrite accumulation is observed obviously in SBR denitrification. It also concludes that the nitrite accumulation rate is 0. 117,0. 136,0. 235 and 0. 068 /d, respectively. In addition,two break points of nitrate and nitrite on ORP profile indicate that the nitrate reduction reaction and nitrite reduction reaction are completed,respectively. For the denitrification,in which nitrite accumulates obviously,nitrate concentration is used as the sole parameter of the denitrification rate （ rDN） is not accurate,and the total oxidized nitrogen （ NO 3- -N ＋ NO 2- -N） should be used,or named as nominal rDN. Furthermore,it concludes that nitrite accumulation is observed that at five different C/N ratios conditions,the accumulation of nitrite caused by nitrite reduction rate is slower than nitrate reduction rate,and for the nitrite peak value,it should be a rate of a balanced point according to the Monod kinetics equation analysis. The dosages of carbon source is sufficient for the conversion of NO 3- -N → NO 2- -N,however it is deficient for transformation of NO x- -N→N2,when n（ C） /n（ N） was 2. 25∶ 1,3. 75∶ 1,respectively.