电絮凝处理受污染地表水中典型污染物中试分析  

Pilot Study on Electrocoagulation for Treatment of Typical Pollutants in Polluted Surface Water

作　　者：邸振华 辛怡颖[1] 张泽瀚 周律[1] DI Zhen-hua;XIN Yi-ying;ZHANG Ze-han;ZHOU Lü(School of Environment,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学环境学院,北京100084

出　　处：《中国给水排水》2022年第21期76-83,共8页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2018ZX07105)。

摘　　要：通过计算流体力学研究了电絮凝装置中电极间距对流场和浓度场的影响,并以此为依据进行了中试分析,考察了其对受污染地表水中典型污染物指标COD、NH-N、TP和浊度的去除效果及规律。结果表明,电极间距的改变会影响流体的流动状态,电极间距越大越容易形成大而不规律的低速区,影响处理效率。电絮凝装置对浊度、COD、NH-N、TP均有较稳定的去除效果,当电流密度为25 A/m^(2)时,电絮凝主要出水水质指标可达到《地表水环境质量标准》(GB 3838—2002)Ⅲ类水标准;当电流密度为15 A/m^(2)时,可达到Ⅳ类水标准。Effect of electrode spacing on the flow field and the concentration field in an electrocoagulation device was investigated by computational fluid dynamics(CFD).Based on this,a pilot test was carried out to investigate the removal performance and mechanism of typical pollutants such as COD,NH-N,TP and turbidity from the polluted surface water.The change in electrode spacing affected the flow state of the fluid between the electrodes.Larger electrode spacing was more likely to form a large and irregular low-velocity zone and thus affected the treatment efficiency.The electrocoagulation device had a relatively stable removal performance on turbidity,COD,NH-N,and TP.When the current density was 25 A/m^(2),the main indicators of effluent met the classⅢcriteria specified in Environmental Quality Standards for Surface Water(GB 3838-2002).When the current density was 15 A/m^(2),the effluent quality met the classⅣsurface water criteria.

关 键 词：电絮凝 受污染地表水 典型污染物 电极间距 

分 类 号：TU992[建筑科学—市政工程]