CRI系统短程硝化-厌氧氨氧化高效脱氮工艺研究  

Study on Efficient Nitrogen Removal Process of CRI System by Short-range Nitrification-anammox

作　　者：陈佼 黄琴 李舒昕 唐艺 陆一新[1,2] Chen Jiao;Huang Qin;Li Shuxin;Tang Yi;Lu Yixin(School of Materials and Environmental Engineering,Chengdu Technological University,Chengdu 611730,China;State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil&Water Pollution,Chengdu 610059,China)

机构地区：[1]成都工业学院材料与环境工程学院,四川成都611730 [2]国家环境保护水土污染协同控制与联合修复重点实验室,四川成都610059

出　　处：《环境科学与管理》2024年第3期118-123,共6页Environmental Science and Management

基　　金：四川省科技计划项目(2022YFG0307);国家环境保护水土污染协同控制与联合修复重点实验室开放基金项目(GHBK-2021-004);四川省大学生创新训练计划项目(S202311116054);成都工业学院实验室开放基金项目(2023CHZH03)。

摘　　要：为解决传统人工快渗(CRI)系统脱氮效果差的问题,构建了由好氧反应柱(O-CRI)和缺氧反应柱(A-CRI)串联而成的两级CRI系统,探讨了在O/A-CRI系统内实现短程硝化-厌氧氨氧化的调控方法及其脱氮效果。结果表明,调节干湿比为4:1并在进水中投加质量浓度为5 g/L的NaCl运行20 d后,NH_(4)^(+)-N去除率、NO_(2)^(-)-N积累率分别为60.7%、97.9%,O-CRI反应柱成功启动短程硝化。逐级提高进水NO_(2)^(-)-N质量浓度至25 mg/L左右,A-CRI反应柱可成功启动厌氧氨氧化,短程硝化-厌氧氨氧化工艺耦合运行后NH+4-N、TN去除率均值分别达到97.5%、90.8%,为CRI系统提供了一种高效脱氮的新方法。For solving the issue of poor nitrogen removal in the traditional constructed rapid infiltration(CRI)system,a two-stage CRI system consisting of an oxygenic reaction column(O-CRI)and an anoxic reaction column(A-CRI)in series were constructed,and the regulating ways to achieve short-range nitrification-anammox and its performance of nitrogen removal were discussed in the O/A-CRI system.The results indicated that after adjusting the dry/wet ratio to 4:1 and adding NaCl with a mass concentration of 5 g/L into the influent water for 20 d,the removal rate of NH_(4)^(+)-N and the accumulation rate of NO_(2)^(-)-N were 60.7% and 97.9%,respectively.The O/CRI column was successfully activated to achieve short-range nitrification.By increasing the influent NO_(2)^(-)-N mass concentration to about 25 mg/L step by step,the A-CRI column could successfully start anammox,and the average values of NH+4-N and TN removal rate reached 97.5% and 90.8%,respectively,after the coupled operation of short-range nitrification-anammox process,which provided a novel method of high-efficiency nitrogen removal for the CRI system.

关 键 词：短程硝化 厌氧氨氧化 CRI系统 脱氮 启动 

分 类 号：X703.1[环境科学与工程—环境工程]