UASB1-A/O-UASB2深度处理垃圾渗滤液  

Advanced Treatment of Landfill Leachate Using the UASB1-A/O-UASB2

作　　者：吴莉娜[1,2] 史枭 张杰[2] 杨天学[3] 彭永臻[2,4] 

机构地区：[1]北京石油化工学院,北京102617 [2]哈尔滨工业大学市政环境工程学院,城市水资源与水环境国家重点实验室,黑龙江哈尔滨150090 [3]中国环境科学研究院水系统工程研究室,北京100012 [4]北京工业大学,北京市水质科学与水环境恢复工程重点实验室,北京100124

出　　处：《环境科学研究》2015年第8期1331-1336,共6页Research of Environmental Sciences

基　　金：国家自然科学基金项目(51208040);中国博士后科学基金面上项目(2013M541382);北京石油化工学院北京市级大学生创新创业训练计划项目

摘　　要：针对传统垃圾渗滤液生物处理TN去除率低、投加碳源成本高的问题,采用UASB1-A/O-UASB2（单级上流式厌氧污泥床＋缺氧/好氧＋后置上流式厌氧污泥床）工艺处理实际垃圾渗滤液,实现NH4^＋-N和TN的同步深度脱除,并且定量解析了A/O反应器实现并维持稳定短程硝化的影响因素.结果表明：以V（垃圾渗滤液）∶V（生活污水）为1∶5的混合液作为进水,其ρ（CODCr）、ρ（TN）和ρ（NH4＋-N）分别为1 700-1 800、660-700和650-680 mg/L,最终出水CODCr、TN和NH4^＋-N去除率均在95%以上,出水ρ（TN）为38 mg/L,满足GB 16889—2008《生活垃圾填埋场污染控制标准》的排放要求.在好氧反应器中,FA（游离氨）与FNA（游离亚硝酸）对NOB（硝化细菌）的联合抑制作用是实现NO2^--N积累率稳定在80%以上的主要原因,而产生的NO2^--N和NO3^--N可在UASB2中以难降解的有机物为碳源,通过反硝化途径被去除.研究显示,组合系统可实现对TN的深度去除.A combined process of a stage upflow anaerobic sludge blanket（ UASB1）,an anoxic/aerobic（ A/O） reactor and a rear UASB（ UASB2） was used to treat actual landfill leachate. This process only used the residual organic matter and internal carbon as the carbon source to completely remove the organic matter,total nitrogen and ammonia nitrogen. The factors affecting the partial nitrification were also investigated. The influent leachate of the system was mixed by raw leachate and domestic wastewater in a ratio of 1： 5. The organic matter,total nitrogen and ammonia nitrogen of the influent leachate of the system were about 1700-1800,660-700 and 650-680 mg/L,respectively. The experimental results showed that the organic matter,total nitrogen and ammonia nitrogen removal efficiencies were higher than 95%,and the total nitrogen concentration of final effluent was about 38 mg/L,which was less than the requirement of the latest national emission standard. In addition,the combined inhibition action of the FA（ free ammonia） and FNA（ free nitrite acid） to the NOB was the major reason for the stable partial nitrification higher than 80% of the nitrite accumulation ratio in the A/O reactor. On the whole,the integrative process could completely remove the nitrite and nitrate produced by the nitrification in the aerobic zone of the A/O reactor and realize advanced nitrogen removal.

关 键 词：垃圾渗滤液 短程硝化 上流式厌氧污泥床 缺氧/好氧反应器 游离氨 游离亚硝酸 

分 类 号：X703[环境科学与工程—环境工程]