生活垃圾渗滤液低温等离子体预处理实验研究

THE TREATMENT OF LANDFILL LEACHATE BY LOW TEMPERATURE PLASMA

采用介质阻挡放电(DBD)低温等离子体(LTP)技术处理生活垃圾渗滤液,实验研究了低温等离子体发生器操作参数放电功率、电介质间距、理论雾滴直径及入流速度对垃圾渗滤液的处理效果。实验结果表明:当进行烧杯实验(溶液量为30 mL)时,放电功率为90 kW,介质间距为5 mm,放电时间为10 min时,垃圾渗滤液中COD处理率达到最大值85.9%,可生化性提升至0.37;当进行动态小试时,理论雾滴直径为100μm,入流速度为15 mL/min时,其他操作参数不变,垃圾渗滤液中COD处理率可达67.8%,可生化性提升至0.32。此系统可与化学-生化系统组合用于生活垃圾渗滤液的达标处理。

The treatment of landfill leachate by dielectric barrier discharge low temperature plasma was studied in this research,which mainly discussed on the treatment efficiency on landfill leachate under the parameters of low temperature plasma producer,such as discharge power,air gap,the theoretical diameter of droplet and inflow velocity. The results showed that the maximum degradation rate of COD reached to 85. 9% and the BOD/COD reached to 0. 37 simultaneously by beaker experiment,when the discharge power was 90 kW,the air gap was 5 mm,the discharge time was 10 min and the solution volume was 30 mL. In dynamic small test system,the degradation rate of COD could reach to 67. 8%,and the BOD/COD could reach to 0. 32 when the theoretical diameter of droplet was 100 μm,the inflow velocity was 15 mL/min and other operating parameters kept constant with beaker experiment. It was predicted that DBD system could be connected with chemical and biochemical system in series to achieve the standard discharge of landfill leachate.