Center for Clean Technology and Resource Recycling, University of Ulsan, Ulsan, South Korea.
Waste Manag. 2011 Sep-Oct;31(9-10):2126-32. doi: 10.1016/j.wasman.2011.05.005. Epub 2011 May 31.
The current food waste leachate (FWL) disposal practice in Korea warrants urgent attention and necessary action to develop an innovative and sustainable disposal strategy, which is both environmentally friendly and economically beneficial. In this study, methane production by FWL injection into a municipal solid waste landfill with landfill gas (LFG) recovery facility was evaluated for a period of more than 4 months. With the target of recovering LFG with methane content ~50%, optimum LFG extraction rate was decided by a trial and error approach during the field investigation in five different phases. The results showed that, upon FWL injection, LFG extraction rate of ~20 m(3)/h was reasonable to recover LFG with methane content ~58%. Considering the estimated methane production potential of 31.7 m(3) CH(4) per ton of FWL, methane recovery from the landfill was enhanced by 14%. The scientific findings of this short-term investigation indicates that FWL can be injected into the existing sanitary landfills to tackle the present issue and such landfills with efficient liner and gas collection facility can be utilized as absolute and sustainable environmental infrastructures.
目前韩国的食物垃圾渗滤液（FWL）处置方法亟待关注，需要制定一种创新且可持续的处置策略，这种策略不仅要环保，还要经济可行。本研究对将 FWl 注入具有垃圾填埋气（LFG）回收设施的城市固体废物填埋场以产生甲烷的过程进行了为期 4 个多月的评估。以回收甲烷含量约为 50%的 LFG 为目标，通过在五个不同阶段的实地调查中的反复试验，确定了最佳的 LFG 提取率。结果表明，在注入 FWl 后，以 20 立方米/小时的 LFG 提取率回收甲烷含量约为 58%的 LFG 是合理的。考虑到 FWl 每吨可产生 31.7 立方米 CH4 的估算产甲烷潜力，从填埋场回收的甲烷增加了 14%。该短期调查的科学发现表明，FWL 可以被注入到现有的卫生填埋场以解决当前的问题，并且具有高效衬垫和气体收集设施的填埋场可以作为一种绝对的、可持续的环境基础设施。
