吴少林, 胡文涛, 李科. 微电解———光催化氧化法对垃圾渗滤液的深度处理[J]. 南昌航空大学学报(自然科学版), 2012, 26(1): 85-90.
引用本文: 吴少林, 胡文涛, 李科. 微电解———光催化氧化法对垃圾渗滤液的深度处理[J]. 南昌航空大学学报(自然科学版), 2012, 26(1): 85-90.
WU Shao-lin, HU Wen-tao, LI Ke. Advanced Treatment of Landfill Leachate by Micro-electrolysis and Photocatalytic Oxidation[J]. Journal of nanchang hangkong university(Natural science edition), 2012, 26(1): 85-90.
Citation: WU Shao-lin, HU Wen-tao, LI Ke. Advanced Treatment of Landfill Leachate by Micro-electrolysis and Photocatalytic Oxidation[J]. Journal of nanchang hangkong university(Natural science edition), 2012, 26(1): 85-90.

微电解———光催化氧化法对垃圾渗滤液的深度处理

Advanced Treatment of Landfill Leachate by Micro-electrolysis and Photocatalytic Oxidation

  • 摘要: 早期对城市垃圾填埋场的垃圾渗滤液大都以生化处理为主, 但存在出水难以达标的问题, 通过适当改进工艺以满足出水要求, 是一种经济有效的途径.本文利用铁炭微电解法——光催化氧化法对某垃圾填埋场的生化处理后垃圾渗滤液进行深度处理.采用单因素实验法研究了pH值、处理时间、铁炭比和铁屑的颗粒大小等因素对微电解法处理垃圾渗滤液效果的影响.结果表明, 在较佳的反应条件下(pH=4.5, 停留时间为120min, 铁炭比为3:1, 铁屑颗粒较小<磨屑>), 其COD和色度的去除率分别达到71.2%和97.0%,BOD5及NH4-N的去除率分别达到70.8%和67.5%.微电解后出水采用光催化氧化法进一步深度处理后, 经检测最终出水中CODcr
    只有52.8mg/L, 其最终去除率可达94%, BOD5及NH4-N的去除率分别达到80%和73.9%, 色度的去除率也达到98%以上, 处理效果较好.

     

    Abstract: In the past, the landfill leachate in the municipal solid waste landfill was treated by biochemical methods, but output wastewater could not reach standards.It is a cost-effective method to properly improve the former treatment process in order to meet the objective.In this paper, a novel route for the advanced treatment of the landfill leachate after biochemical treatment was proposed viairon-carbon micro-electrolysis and photocatalytic oxidation.The expermental parameters of micro-electrolysis including pH, processing time, iron-carbon ratio and particle size of iron pellet were examined and optimized.The results showed that when the optimal conditions were: pH=4.5, retention time=120 mins, iron-carbon ratio=2, and with small iron fillings pellet(rubs fillings), the removal rates of CODcr and chroma in the landfill leachate reached 71.2% and 97.0%, and the removal rates of BOD5 and NH4-N in the landfill leachate reached 70.8% and 67.5%, respectively.The output wastewater was further treated using photocatalytic oxidation.Finaly, the CODcr value in waste water was only 52.8mg/L, the removal rate of CODcr in the leachate reached 94%, the removal rates of BOD5, NH4-N and chroma in the landfill leachate reached 80%, 73.9% and 98%, respectively.The proposed procedure was applied to treat landfill leachate with satisfactory results.

     

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