中文摘要：

应用＂两级上流式厌氧污泥床（UASB）-缺氧/好氧（A/O）-序批式反应器（SBR）系统＂深度处理实际晚期垃圾渗滤液,研究在A/O反应器中实现并维持稳定短程硝化的影响因素。该系统按如下模式运行：首先在一级UASB（UASB1）中实现反硝化,残余亚硝态氮和硝态氮利用剩余COD（化学需氧量）在二级UASB（UASB2）中通过反硝化被进一步去除,之后在A/O反应器的好氧区进行NH4＋-N的硝化,最后在SBR中去除硝化产生的亚硝态氮及硝态氮深度脱氮。试验结果表明：原渗滤液COD质量浓度仅3.00 g/L左右,氨氮质量浓度在2.00 g/L左右;系统进水采用将原渗滤液与生活污水1：1混合液,且投加相当于1.56 g/L COD的外碳源无水乙酸钠,将C和N质量浓度比由1.7提高到3.0;通过FA与FNA对NOB的联合抑制,在A/O反应器中实现了稳定的短程硝化,其中亚硝态氮积累率大与70%;产生的亚硝态氮和硝态氮在SBR中被彻底去除;最终出水氨氮质量浓度小于2 mg/L,氨氮的去除率为99%;最终出水总氮质量浓度为26 mg/L,系统总氮去除率接近98%。

英文摘要：

A combined process of a two-stage up-flow anaerobic sludge blanket（UASB）,an anoxic/aerobic（A/O） reactor and a sequencing batch reactor（SBR） was used to treat mature landfill leachate,and the influencing factors on short-cut nitrification in A/O reactor were also researched.The operational mode of the process was as follows：Denitrification took place in the first stage UASB（UASB1）.The residual nitrite and nitrate of UASB1 by using the residual chemical oxygen demand（COD） was further removed in the second stage UASB（UASB2）.The ammonia nitrogen was removed by short-cut nitrification in the aerobic zone of A/O reactor.The nitrite and nitrate produced from the nitrification were removed in SBR.The experiment results show that the COD and ammonia nitrogen mass concentrations of raw leachate are about 3.0 g/L and 2.0 g/L,respectively.The influent leachate is mixed by raw leachate as well as domestic wastewater in a ratio of 1.The external carbon source（sodium acetate anhydrous） is added in order to enhance the ρ（C）/ρ（N） ratio from 1.7 to 3.0.Through the cooperative inhibition of the free ammonia（FA） and free nitrite acid（FNA）,the short-cut nitrification is achieved stably in the A/O reactor with more than 70% of the nitrite accumulation ratio.The nitrite and nitrate produced from the nitrification could be removed completely in SBR.The ammonia mass concentration of final effluent is less than 2 mg/L,and its removal efficiency is 99%.The total nitrogen mass concentration of final effluent is about 26 mg/L,and its removal efficiency is about 98%.