垃圾填埋场渗滤液短程生物脱氮的长期稳定性实验研究  

Study on Long-Term Stability of Biological Nitrogen Removal via Nitrite from Real Landfill Leachate

作　　者：孙洪伟[1,2] 郭英[1] 彭永臻[2] 

机构地区：[1]兰州交通大学环境与市政工程学院,兰州730070 [2]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》2014年第1期221-226,共6页Environmental Science

基　　金：国家自然科学基金项目(51168028);甘肃省青年基金计划项目(1107RJYA279);兰州交通大学大学生实验创新计划项目(201078)

摘　　要：以实际高氨氮垃圾渗滤液为研究对象，考察了单级UASB—SBR生化系统除有机物和脱氮特性，重点研究了常、低温条件下，该生化系统生物脱氮的长期稳定性．623d的实验结果表明，基于UASB反应器内高效的反硝化和厌氧产甲烷联合去除机制，以及SBR反应器内几乎100％的硝化和反硝化，在进水COD浓度为1000～13800mg·L^-1条件下，最终出水COD浓度为150～1234mg·L^-1，在进水NH4＋-N浓度为574～2360mg·L^-1条件下，最终出水NH4＋-N小于10mg·L^-1，平均去除率分别在90％和98％以上，尤其是获得了99．2％的TN去除率，出水TN小于30mg·L^-1，实现垃圾渗滤液内有机物和氮的高效、深度去除．整个实验期间，SBR反应器实现并维持了稳定的生物硝化和反硝化，成功跨越2个冬季，15℃以下共计171d，最低温度为10．2℃．The long-term stability of nitrogen removal from municipal landfill with high ammonia nitrogen （NH4-N） content was investigated by using a biological system consisting of a first-stage up-flow anaerobic sludge bed （UASB） and sequencing batch reactor （SBR） under normal and low temperature conditions. The 623 days experimental results clearly showed： the efficient denitrification and methanogenesis were conducted in a same UASB reactor, and almost 100% of denitrification was obtained, when feed COD concentration ranged from 1 000 mg·L^-1 to 13 800 mg·L^-1 , effluent COD concentration was between 150 mg. L-i and 1 234 mg·L^-1 , and when the influent ammonia nitrogen （NH4-N） changed from 574 mg·L^-1 to 2 360 mg·L^-1, the effluent NH4-N was below 10 mg·L^-1,the removal efficiency reached 90% and 98%, respectively. Especially, above 99.2% removal efficiency of TN was obtained, and effluent TN concentration was below 30 mg·L^-1 , advanced and efficient nitrogen and organic removal were achieved in the biological system. Furthermore, stable nitrification and denitrification were achieved during the entire experiment period, especially, were maintained successfully for 171days at the temperature below 15℃ and the lowest temperature of 10. 2℃ during two winters.

关 键 词：垃圾渗滤液 单级UASB—SBR 生物脱氮 低温 

分 类 号：X703.1[环境科学与工程—环境工程]