电化学氧化法处理污水厂二级出水研究  

Research on the Treatment of Secondary Effluent from Wastewater Treatment Plant by Electrocatalytic Oxidation

作　　者：李兆阳 张浩[1] 李诚 王少坡[1] LI Zhaoyang;ZHANG Hao;LI Cheng;WANG Shaopo(Tianjin Chengjian University,Tianjin 300384,China;Tianjin Huabo Water Limited Company,Tianjin 300040,China)

机构地区：[1]天津城建大学,天津300384 [2]天津市华博水务有限公司,天津300040

出　　处：《天津城建大学学报》2024年第1期45-51,共7页Journal of Tianjin Chengjian University

摘　　要：为了确定电化学氧化法对城镇污水处理厂二级出水的处理效果,采用间歇式反应器,以COD、氨氮、总氮为主要考察指标,对比了钌铱-石墨、钌钛-石墨两种电极板的去除性能;分析了氨氮、COD的去除机理.结果表明:以氨氮为去除目标时,利用正交实验得到了去除氨氮的优化运行条件为pH=6.0,电流密度为10 mA/cm^(2),极板间距=1.0 cm,氯化物浓度为2000 mg/L,反应时间为50 min,90%以上的氨氮以氮气的形式被去除;以COD去除率为考察目标时,优化运行条件为pH=7.0,电流密度为10 mA/cm^(2),极板间距为1.0 cm,氯化物浓度为1500 mg/L,反应时间为50 min;优化条件下运行时,氨氮去除率可达99.0%以上,COD去除率为41.1%;三维荧光分析发现,水中有机物荧光强度有明显下降.In order to determine the effect of electrochemical oxidation on the secondary effluent of urban sewage treatment plant,a batch reactor was used,and COD,ammonia nitrogen and total nitrogen were taken as the main indicators.The removal performance of Ti/RuO_(2) graphite and Ti/RuO_(2)-IrO_(2) graphite electrode plates was compared,and the removal mechanism of ammonia nitrogen and COD was analyzed.The results show that when ammonia nitrogen is taken as the removal target,the optimal operating conditions for removing ammonia nitrogen are obtained by orthogonal experiment as follows:current density of 10 mA/cm^(2),pH=6.0,plate spacing=1.0 cm,chloride concentration of 2000 mg/L,and reaction time of 50 min.More than 90%of ammonia nitrogen is removed in the form of nitrogen.The optimal operating conditions for COD removal are as follows:pH=7.0,current density of 10 mA/cm^(2),plate spacing of 1.0 cm,chloride concentration of 1500 mg/L and reaction time of 50 min.Under the optimized conditions,the removal rate of ammonia nitrogen and COD can reach 99.0%and 41.1%respectively.Three dimensional fluorescence analysis showed that the fluorescence intensity of organic matter in water decreased significantly.

关 键 词：电化学氧化 正交实验 二级出水 钌钛电极 三维荧光光谱 

分 类 号：X703[环境科学与工程—环境工程]