摘要
针对厌氧氨氧化工艺启动速度慢及在垃圾渗滤液中脱氮效率低的问题,探究了厌氧氨氧化工艺在处理高氨氮、低C/N比垃圾渗滤液中的快速启动及稳定运行策略。结果表明,厌氧氨氧化工艺接种反硝化污泥:anammox颗粒污泥=9:1的启动效果最佳,100 d时TN去除率可达75.1%。但由于垃圾渗滤液中COD较高,异养反硝化菌生长迅速且严重影响厌氧氨氧化菌活性。通过投加6 mg·L^(-1)的N_(2)H_(4)之后,异养反硝化菌活性受到抑制,反应器内厌氧氨氧菌占据主导地位,Candidatus Kuenenia菌相对丰度由0.2%提升到10.6%,TN去除率及氮去除速率分别达90.6%和0.143 kg·(kg·d)^(-1)以上。在厌氧氨氧化工艺中投加适量N_(2)H_(4)可实现垃圾渗滤液的稳定高效自养脱氮。
Aiming at the problems of slow start-up and low denitrification efficiency of anammox process in landfill leachate,the strategy of rapid start-up and steady operation of anammox process in treating landfill leachate with high ammonia nitrogen and low C/N ratio was investigated.The results showed that the anammox process inoculated with denitrifying sludge:anammox granular sludge=9:1 had the optimal start-up effect,and TN removal rate could reach 75.1%at 100 d.However,due to the high COD in landfill leachate,heterotrophic denitrifying bacteria grew rapidly and seriously affected the activity of anammox bacteria.After the addition of 6 mg·L^(−1)N_(2)H_(4),the activity of heterotrophic denitrifying bacteria was inhibited and the abundance of anammox bacteria dominated.The relative abundance of Candidatus Kuenenia increased from 0.2%to 10.6%,and TN removal rate and nitrogen removal rate reached over 90.6%and 0.143 kg·(kg·d)^(−1),respectively.The stable and efficient autotrophic denitrification of landfill leachate could be achieved by adding an appropriate amount of N_(2)H_(4)to the anammox process.
作者
关威
梁慧宇
陈奔
陈之均
郭五珍
郭敬宜
赵欣
孙连鹏
吕慧
GUAN Wei;LIANG Huiyu;CHEN Ben;CHEN Zhijun;GUO Wuzhen;GUO Jingyi;ZHAO Xin;SUN Lianpeng;LYU Hui(School of Environmental Science and Engineering,Sun Yat-sen University,Guangzhou 510006,China;School of Environmental Science and Engineering,Guilin university of technology,Guilin 541006,China;Foshan Water Industry Group Co.Ltd.,Foshan 528000,China;Zhongshan Public Utilities Group Co.Ltd.,Zhongshan 528400,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2023年第8期2745-2757,共13页
Chinese Journal of Environmental Engineering
基金
2021年佛山市社会领域科技攻关专项(2120001008746)。
关键词
自养脱氮
厌氧氨氧化
垃圾渗滤液
联氨
autotrophic denitrification
anammox
landfill leachate
N_(2)H_(4)
