混凝-活性炭-过氧化氢组合工艺处理垃圾渗滤液研究

用混凝-活性碳-过氧化氢组合工艺处理垃圾渗滤液,探讨了不同处理技术的最佳工艺条件和处理效果.结果表明,pH为4.0、投加200 mg·L~(-1)氯化铁、慢速搅拌25 min、静置60 min时混凝效果最好;而后在室温、pH=3.0、H_2O_2(质量分数为30%)投加量为5mL·L~(-1)、活性碳与H_2O_2的质量比为1:2、反应120min时,COD去除率最好.经混凝-活性炭-H_2O_2组合工艺处理后,垃圾渗滤液中COD、UV_(254)、UV_(410)和UV_(436)的去除率分别能达到89.44%,82.13%,90.625%和91.35%,其中出水中COD为75.69 mg·L~(-1),达到GB 16889-2008中污染物的排放限值.

A SEQUENTIAL COAGULATION-ACTIVATED CARBON/HYDROGEN PEROXIDE OXIDATION PROCESS FOR TREATING MUNICIPAL SOLID WASTE LANDFILL LEACHATE

The combination of coagulation-activated caibon/hydrogen peroxide processes was designed for treating the landfill leachate with the high organic content. The optimum treatment conditions were examined through conducting a serious of experiments. After being treated by the coagulation-activated carbon/hydrogen peroxide processes, the removal rates for COD, UV_(254),UV_(410) and UV_(436) levels in the target landfill leachate were improved significantly up to as much as 89.44%, 82.13%,90.625% and 91.35%, respectively. COD was lowered by 89.44% to 75.69 mg·L~(-1). Moreover, the quality of the effluent from the sequential processes treatment meets the emitting concentration limit set by the state standard for municipal solid waste sanitary landfill pollution control (GB 16889-2008).