单一缺氧/厌氧UASB同步反硝化产甲烷与A/O组合工艺处理实际晚期渗滤液  

Single anoxic/anaerobic UASB simultaneous denitrification and methanogenesis combined with A/O for treatment of real landfill leachate

作　　者：孙洪伟[1] 王淑莹[1] 时晓宁[1] 张树军[1] 杨庆[1] 彭永臻[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：《化工学报》2009年第11期2891-2896,共6页CIESC Journal

基　　金：北京市自然科学基金重点项目(8091001);国家自然科学基金项目(50808004)~~

摘　　要：以实际高氮晚期渗滤液为研究对象,应用缺氧/厌氧UASB-A/O组合工艺重点研究有机物和氮的去除特性,同时考察了A/O系统内短程硝化实现途径及稳定方法。试验结果表明,该生化系统可实现有机物和氮的同步、深度去除。在原液COD平均为6537mg.L-1,NH4+-N为2021mg.L-1的条件下,系统最终出水分别为300mg.L-1和15.6mg.L-1,去除率分别为95.4%和99.2%。UASB反应器的平均COD负荷为6.5kgCOD.m-3.d-1,去除速率为5.3kgCOD.m-3.d-1。在单一UASB反应器内,发生了缺氧反硝化和厌氧产甲烷的双重生化反应,UASB反应器内获得了几乎100%的反硝化率。通过高游离氨(FA)和游离亚硝酸(FNA)的协同作用,使A/O反应器实现并维持了稳定的短程硝化,通过99%以上的亚硝化率实现高效的氨氮去除。The treatment of real leachate from municipal landfill with high ammonia nitrogen （NH4^＋-N） content was studied by using a combined process of lab-scale anoxic/anaerobic up-flow anaerobic sludge bed （UASB） -A/O. The method for achieving and stabilizing partial nitrification in the A/O reactor was also investigated. Experimental results clearly showed that COD and nitrogen can be simultaneously deeply removed with this combined biological system, average COD and NH^＋-N have been reduced from 6537 mg.L^-1 and 2021 mg.L^-1 in the raw leachate to 300 mg.L^-1 and 15.6 mg.L^-1 , respectively. For the anoxic UASB reactor, the average organic loading rate reaches to 6.5 kg . m^-3 . d^-1, and its average organic removal rate is 5.3 kg. m^-3 . d^-1. The denitrification and methanogenesis are simultaneously conduced in the UASB reactor, and almost 100% denitrification has been achieved. A stable and long term partial nitrification have been realized by the cooperative effect of FA and FAN, the ammonia nitrogen has been removed through the highly effective partial nitrification with above 99% nitrite accumulation rate.

关 键 词：垃圾渗滤液 同步反硝化产甲烷 生物脱氮 短程硝化 游离氨 游离亚硝酸 

分 类 号：X703.1[环境科学与工程—环境工程]