摘要
传统生物处理工艺对垃圾渗滤液，特别是老龄化垃圾渗滤液处理效果差，而膜生物反应器（MBR）在这方面显现出巨大优势。MBR通过截留微生物保持高生物量浓度，只需较短的水力停留时间，并可承受较大有机负荷率，能有效去除有机物及微污染物，对氨氮的去除率达90％以上。优化条件下，对老龄垃圾渗滤液中COD的去除率达75％以上。虽然MBR性能稳定，但较短的水力停留时间和高浓度的氨氮对反应器有不良影响，并且较大的污泥龄也会降低反应器的性能。然而厌氧MBR和改进型活性炭粉末MBR在垃圾渗滤液的治理中表现出了巨大的潜力。
Landfill leachate （LFL） is very difficult to treat by using conventional biological processes, especially aged leachate. To this end, membrane bioreactor （MBR） has proven to be a promising alternative. The membrane separation capacity of a MBR allows the interception of most microbial cells in the reactor to maintain a high biomass concentration. As a result, over 90% removals of biological oxygen demand （BOD） and ammonia could be achievable with a much shorter hydraulic retention time （HRT） and much higher organic loading rate （OLR）. MBR also allows excellent removal of chemical oxygen demand （COD） from aged LFL up to 75% or higher under optimised conditions. MBRs have also been demonstrated to be effective in the removal of micropollutants. Furthermore, recent developments such as anaerobic MBR and modified PAC （powdered activated carbon） MBR have shown great potentials in LFL treatment. Although MBRs could provide stable performance, short HRT and high ammonia concentration were found to have adverse effects, and extremely aged sludge could lower MBR performance.
出处
《上海环境科学》
CAS
2013年第1期36-41,共6页
Shanghai Environmental Sciences
关键词
垃圾渗滤液
膜生物反应器
化学需氧量
氨氮
后处理
Landfill leachate Membrane bioreactor Chemical oxygen demand （COD）Ammonia Post-treatment
