PDF(Pubmed)
Abstract：
The sustainable management of landfill leachates remains a matter of important concern in many countries. We used as case study a medium-sized Greek landfill, and we initially investigated the performance of the existing secondary leachate treatment system. The activated sludge process removed chemical oxygen demand (COD), biochemical oxygen demand (BOD), NH4-N, and PO4-P by 55%, 84%, 94%, and 14%, respectively, but the effluents did not meet the legislation requirements for discharge or reuse. Afterwards, different management options of these effluents (co-treatment with sewage in the centralized treatment plant, onsite tertiary treatment with reverse osmosis, granular activated carbon (GAC), ozonation, photo-Fenton, or constructed wetlands) were evaluated regarding their operational costs and environmental footprint. The use of constructed wetlands presented the lower operational cost, energy requirements, and greenhouse gas (GHG) emissions, not exceeding 21.5 kg CO2eq/day. On the other hand, the power consumption and the GHG emissions of the other on-site technologies ranged from 0.37 kWh/m3 and 5.56 kg CO2eq/day (use of GAC) to 39.19 kWh/m3 and 588.6 kg CO2eq/day (use of ozonation), respectively. The co-treatment of the leachates with municipal wastewater required 0.6 kWh/m3 and emitted 30.18 kg CO2eq/day. For achieving zero-discharge of the treated leachates, a system consisting of constructed wetlands and evaporation ponds in series was designed.
摘要：
垃圾渗滤液的可持续管理仍然是许多国家关注的重要问题。我们用一个中等大小的希腊垃圾填埋场作为案例研究，我们初步调查了现有二次渗滤液处理系统的性能。活性污泥法去除化学需氧量(COD),生化需氧量（BOD），NH4-N,和PO4-P增加了55%,84%,94%,14%,分别,但是废水不符合排放或再使用的立法要求。之后,这些废水的不同管理方案(集中处理厂与污水共同处理，现场反渗透三级处理，颗粒活性炭(GAC)，臭氧化,照片-芬顿,或人工湿地)对其运营成本和环境足迹进行了评估。人工湿地的使用带来了较低的运营成本，能源需求,和温室气体(GHG)排放，不超过21.5kgCO2eq/天。另一方面,其他现场技术的功耗和温室气体排放量范围从0.37kWh/m3和5.56kgCO2eq/天(使用GAC)到39.19kWh/m3和588.6kgCO2eq/天(使用臭氧化)，分别。渗滤液与城市废水的共处理需要0.6kWh/m3，排放30.18kgCO2eq/天。为了实现处理后的渗滤液的零排放，设计了一个由人工湿地和蒸发池串联组成的系统。
