自养脱氮技术处理老龄填埋场渗滤液的中试研究  

Pilot study of autotrophic denitrification technology in aged landfill leachate

作　　者：刘冬冬 王健[2] LIU Dongdong;WANG Jian(Beijing Xiangchuan Environmental Technology Co.,Ltd.,Beijing 101300,China;Chinese Research Academy of Environmental Sciences,Environmental Technology&Engineering Co.,Ltd.,Beijing 100012,China)

机构地区：[1]北京香川环境技术有限公司,北京101300 [2]中国环境科学研究院环境技术工程有限公司,北京100012

出　　处：《给水排水》2024年第S1期186-190,195,共6页Water & Wastewater Engineering

摘　　要：针对老龄填埋场渗滤液C/N低、出水总氮不达标、脱氮成本居高不下等问题,通过自养脱氮技术对垃圾渗滤液的高浓度总氮生化尾水进行中试研究。试验结果表明,当中试装置进水TN≤1 600 mg/L,TKN≤60 mg/L,NO_(3)^(-)-N≤550 mg/L,NO_(2)^(-)-N≤1 400 mg/L时,通过自养反硝化中试装置处理30天后,进水总氮容积负荷1.5 kg/(m^(3)·d)时,出水NO_(3)^(-)-N、NO_(2)^(-)-N去除率均可稳定达到99%以上,出水TN的去除率可稳定达到95%以上;出水TN平均浓度约50mg/L,远低于《污水排入城镇下水道水质标准》(GBT 31962-2015)中A级标准的70 mg/L,且在同等总氮去除条件下,其直接运行费用较传统投加碳源方式可节约40%左右。因此,自养脱氮在老龄填埋场渗滤液尾水脱氮上具有良好的应用前景。Aiming at the thorny problems such as low C/N of leachate in old landfill,substandard total nitrogen in effluent and high cost of denitrification,a pilot study on high concentration total nitrogen biochemical tail water of landfill leachate was carried out by autotrophic denitrification technology.The results showed that when the influent TN≤1600 mg/L,TKN≤60 mg/L,NO_(3)^(-)-N≤550 mg/L,NO_(2)^(-)-N≤1400 mg/L,the removal rate of NO_(3)^(-)-N and NO_(2)^(-)-N in the effluent could reach more than 99%and the removal rate of TN in the effluent could reach more than 95%when the total nitrogen volume load of the influent was 1.5 kg/(m^(3)·d)after 30 days of treatment by the autotrophic denitrification pilot plant.The average concentration of TN in the effluent was about 50 mg/L,which was much lower than 70 mg/L of the A-level standard in the Wastewater quality standard for discharge into urban sewers(GBT 31962-2015).Under the same total nitrogen removal conditions,the direct operation cost can be saved by about 40%compared with the traditional carbon source addition method.Therefore,autotrophic denitrification has a good application prospect in the denitrification of leachate tail water in aged landfill.

关 键 词：自养脱氮 垃圾渗滤液 自养反硝化 

分 类 号：TU992[建筑科学—市政工程]