摘要
低C/N比高浓度硝酸盐废水的处理是一个有前景但又具有挑战性的研究课题,电化学还原耦合厌氧氨氧化工艺是一种极具发展潜力的污水脱氮技术,将两种脱氮技术结合,既弥补了厌氧氨氧化技术反应底物NO_(2)^(-)-N和NH_(4)^(+)-N不足的缺陷,又弥补了电化学成本高的缺点。采用两步法电沉积制备Cu-Ag-Co电极,成功使用电化学还原耦合厌氧氨氧化工艺处理低C/N比高浓度硝酸盐废水。结果表明:电流密度10 mA/cm^(2)、初始pH为7时,亚硝酸盐氮和氨氮生成量分别为180.2 mg/L和173.2 mg/L,随后进入厌氧氨氧化单元深度处理,最终硝酸盐氮去除率为82.6%。
The treatment of low C/N ratio high-concentration nitrate wastewater is a promising but challenging research topic.Electrochemical reduction coupled anaerobic ammonia oxidation is a highly potential wastewater denitrogenation technology,which combined the two denitrogenation technologies to make up for the defects of insufficient reaction substrates of NO_(2)^(-)-N and NH_(4)^(+)-N in anaerobic ammonia oxidation,and also makes up for the shortcomings of the high cost of electrochemistry.In this study,Cu-Ag-Co electrodes were prepared by two-step electrodeposition,and the electrochemical reduction coupled with anaerobic ammonia oxidation process was successfully used to treat low C/N ratio and high concentration nitrate wastewater.The study showed that the nitrite nitrogen and ammonia nitrogen generation were 180.2 mg/L and 173.2 mg/L,respectively,at a current density of 10 mA/cm^(2) and an initial pH of 7.Subsequently,it entered the anaerobic ammonia oxidation unit for deep treatment,and the final nitrate nitrogen removal rate was 82.6%.
出处
《环境保护与循环经济》
2024年第11期26-30,共5页
environmental protection and circular economy
基金
辽宁省科学技术厅应用基础研究(2022JH2/101300121)。
