垃圾渗滤液催化电解氧化深度处理的研究

Study on the Electro-catalytic Oxidation Process for Advanced Landfill Leachate Treatment

利用催化电解氧化技术对垃圾渗滤液生物处理出水进行了小试和中试研究,研究了影响电解处理效果的因素,并重点考察了达到排放标准所需要的电耗。结果表明:影响电解处理效果的因素主要包括进水的COD和NH3-N浓度、电流密度、极水比、电解时间等。试验结果显示,采用板状RuO2-IrO2-TiO2/Ti电极,电极间距为10mm,进水COD为500mg/L左右,NH3N为15mg/L左右。将COD降至二级排放标准,最佳的电流密度为2.81A/dm2,电解耗时仅需15min左右,电耗为6.82kWh/T。将COD降至一级排放标准,所需电解时间约82min,电耗为37.33kWh/T。

Lab-scale and full-scale studies on electro-catalytic oxidation process for landfill leachate were performed to treat the effluent of the biological treatment system.The main influence factors and the energy consumption were investigated in this paper.The results showed that the main influence factors consist of the influent concentration of COD and ammonia,current density, the ratio of electrode area to flowrate,electrolysis time,etc.When RuO_2-IrO_2-TiO_2/Ti was used as electrode,electrode gap was 10mm and the influent concentration of COD and ammonia were about 500mg/L and 15mg/L respectively,the best current density was 2.81 A/dm^2. In order to comply with the secondary discharge standard,the electrolysis time was only about 15 minutes and energy consumption was about 6.82 kWh/T.In order to comply with the secondary discharge standard, the electrolysis time was about 82 minutes and the energy consumption was about 37.33 kWh/T.