不同时期垃圾渗滤液两级UASB-A/O-SBR工艺深度脱氮  

Advanced nitrogen removal via nitrite from young and mature landfill leachate by two stage UASB-A/O-SBR process

作　　者：吴莉娜[1] 王淑莹[1] 彭永臻[1] 宋燕杰[1] 刘牡[1] 

机构地区：[1]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：《东南大学学报（自然科学版）》2010年第6期1342-1347,共6页Journal of Southeast University：Natural Science Edition

基　　金：北京市自然科学基金重点资助项目(8091001);国家自然科学基金资助项目(50978003)

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)深度处理早期和晚期垃圾渗滤液.首先在一级UASB(UASB1)中实现反硝化,在二级UASB(UASB2)中通过产甲烷降解有机物,在A/O反应器的好氧区进行NH4+-N的硝化,最后在SBR中去除残余NH4+-N及通过反硝化去除NO2--N和NO3--N深度脱氮.试验结果表明:早期渗滤液ρ(COD),ρ(TN)和ρ(NH4+-N)分别为14.8,1.8和1.3mg/mL,最终出水ρ(TN),ρ(NH4+-N),ρ(NO2--N)和ρ(NO3--N)分别为28,4,3.4和1.9mg/L,获得了大于98%的TN和NH4+-N去除率.晚期渗滤液ρ(COD)为2.5mg/mL;ρ(TN),ρ(NH4+-N)分别为3.0和2.9mg/mL时,获得99%以上的TN和NH4+-N去除率.最终出水ρ(NH4+-N),ρ(NO2--N)和ρ(NO3--N)都小于10mg/L,最终出水ρ(TN)为26～32mg/L.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 fresh and matured landfill leachate.The operational mode of the process was as follows： denitrification took place in the first stage UASB（UASB1）;the chemical oxygen demand（COD） was mainly removed in the second stage UASB（UASB2） by methanogenesis;the ammonium nitrogen was removed by partial nitrification in the aerobic zone of A/O reactor;the residual ammonia nitrogen was removed in SBR;and the nitrite and nitrate which was produced by the nitrification was also removed in SBR.The experiment results show that the COD,TN and NH＋4-N concentrations of fresh leachate are about 14.8,1.8 and 1.3 mg/mL,respectively;the TN,NH＋4-N,NO-2-N and NO-3-N concentrations of final effluent leachate are 28,4,3.4 and 1.9 mg/L,respectively;and the TN and NH＋4-N removal efficiency are more than 98%.Meanwhile the COD,TN and NH＋4-N concentrations of matured leachate are 2.5,3.0 and 2.9 mg/mL,respectively;the TN and NH＋4-N removal efficiency are more than 99%;the NH＋4-N,NO-2-N and NO-3-N concentrations of final effluent are less than 10 mg/L;the TN concentration of final effluent is about 26-32 mg/L.

关 键 词：垃圾渗滤液 脱氮 短程硝化 UASB A/O SBR 

分 类 号：X703.1[环境科学与工程—环境工程]