铁炭微电解法削减老龄垃圾渗滤液的毒性研究

Detoxification Experiment of Older Landfill Leachate by Ferric- Carbon Micro-electrolysis Method

采用铁炭微电解法进行了削减老龄垃圾填埋场渗滤液毒性的试验,研究了初始pH值、铁炭比、铁炭添加量、反应时间等对有机污染物去除及生物毒性削减效果的影响,并采用耗氧呼吸速率法评估了经铁炭法处理前、后渗滤液的生物降解性能。结果表明,当pH值为3、铁与炭的质量比为5∶1、其添加量分别为5g/100mL和1g/100mL以及反应时间为120min时,铁炭微电解法对有机污染物的去除率及生物毒性削减率分别达到了54.7%和92.1%。经过铁炭微电解法处理后水样的耗氧呼吸速率常数较原水的提高了279%,可生化性得到了显著改善。

Ferric - carbon micro-electrolysis method was applied in the detoxification of older landleachate. The reaction conditions, such as pH, Fe/C ratio, reaction time which would influence the organic contaminants removal and toxicity reduction, were studied. The biodegradability of landfill leachate before and after ferric - carbon micro-electrolysis treatment was evaluated by respirometric analysis. The result indicates that when the pH is 3, Fe/C ratio is 5 ： 1, the dosage of iron and activated carbon are 5 g/100 mL and 1 g/100 mL, and the reaction time is 120 min, the removal rate of the organic contaminants and the degree of toxicity reduction reach 54.7% and 92.1% respectively. After ferric - carbon micro-electrolysis treatment, OUR constant increases by 279% compared with original leachate, and the biodegradability of the leachate is improved greatly.