超声波协同电凝聚气浮法处理垃圾渗滤液的试验研究  

Treatment of landfill leachate by combined technology of ultrasonic and electrocoagulation-floatation

作　　者：李江云[1] 朱艳梅[1] 毛月红[1] 温丙奎[1] 

机构地区：[1]武汉大学土木建筑工程学院,武汉430072

出　　处：《工业用水与废水》2008年第6期47-50,共4页Industrial Water & Wastewater

摘　　要：分析了超声波在处理高浓度难降解有机物方面的优势及限制条件,提出利用超声波联合电凝聚气浮法处理晚期垃圾渗滤液工艺。试验研究分为单独超声波处理、单独电凝聚气浮处理以及超声波协同电凝聚气浮处理3个阶段。采用单因素分析法,揭示了反应时间、电凝聚电压、pH值、超声波功率和曝气方式对COD去除率的影响规律。得出最佳参数为反应时间30min,电凝聚电压12V,初始pH值为6.0,超声波辐照功率为125W,预先曝气20min。在此条件下,渗滤液中COD的质量浓度由822mg/L下降至232mg/L,COD去除率高达71.75%,而单独超声波和单独电凝聚气浮的去除率分别仅为15.74%、42.17%,从而验证了超声波技术与电凝聚气浮法联合处理有协同作用。The advantages and limit conditions of ultrasonic applied for treatment of high concentration harddegradable organic matters were analyzed and the method that using combined technology of ultrasonic and electrocoagulation-floatation to treat late landfill leachate was proposed. The test were divided into three phases： single ultrasonic treatment, single electrocoagulation-floatation treatment and combined ultrasonic and electrocoagu- lation-floatation treatment. The effects of reaction temperature, electrocoagulation voltage, pH value, ultrasonic power and aeration modes on removal rate of COD were revealed through single-factor analysis; and then, the optimal reaction condition was determined as follows： the reaction time was 30 min, the electrocoagulation voltage was 12 V, the initial pH value was 6.0, the ultrasonic radiant power was 125 W, the preoxygenation time was 20 min. After the treatment under the above condition, the mass concentration of COD in the leachate decreased from 822 mg/L to 232 rag/L, the removal rate of COD reached 71.75%; however, the removal rates of COD by single ultrosonic and single electrocoagulation-floatation were only 15.74% and 42.17% respectively, the advantages of the cooperation of ultrasonic and electrocoagulation-floatation in landfill leachate treatment were verified thereby.

关 键 词：超声波 降解机理 晚期垃圾渗滤液 电凝聚气浮 

分 类 号：X703.1[环境科学与工程—环境工程]