Lee Dae Hee, Behera Shishir Kumar, Kim Ji Won, Park Hung-Suck
Center for Clean Technology and Resource Recycling, Department of Civil and Environmental Engineering, University of Ulsan, P.O. Box 18, Ulsan 680-749, Republic of Korea.
Waste Manag. 2009 Feb;29(2):876-82. doi: 10.1016/j.wasman.2008.06.033. Epub 2008 Sep 14.
This paper examines the applicability of food waste leachate (FWL) in bioreactor landfills or anaerobic digesters to produce methane as a sustainable solution to the persisting leachate management problem in Korea. Taking into account the climatic conditions in Korea and FWL characteristics, the effect of key parameters, viz., temperature, alkalinity and salinity on methane yield was investigated. The monthly average moisture content and the ratio of volatile solids to total solids of the FWL were found to be 84% and 91%, respectively. The biochemical methane potential experiment under standard digestion conditions showed the methane yield of FWL to be 358 and 478 ml/g VS after 10 and 28 days of digestion, respectively, with an average methane content of 70%. Elemental analysis showed the chemical composition of FWL to be C(13.02)H(23.01)O(5.93)N(1). The highest methane yield of 403 ml/g VS was obtained at 35 degrees C due to the adaptation of seed microorganisms to mesophilic atmosphere, while methane yields at 25, 45 and 55 degrees C were 370, 351 and 275 ml/g VS, respectively, at the end of 20 days. Addition of alkalinity had a favorable effect on the methane yield. Dilution of FWL with salinity of 2g/l NaCl resulted in 561 ml CH(4)/g VS at the end of 30 days. Considering its high biodegradability (82.6%) and methane production potential, anaerobic digestion of FWL in bioreactor landfills or anaerobic digesters with a preferred control of alkalinity and salinity can be considered as a sustainable solution to the present emergent problem.
本文探讨了食品垃圾渗滤液（FWL）在生物反应器填埋场或厌氧消化池中用于生产甲烷的适用性，以此作为解决韩国持续存在的渗滤液管理问题的可持续解决方案。考虑到韩国的气候条件和FWL的特性，研究了关键参数（即温度、碱度和盐度）对甲烷产量的影响。FWL的月平均水分含量和挥发性固体与总固体的比例分别为84%和91%。标准消化条件下的生化甲烷潜力实验表明，消化10天和28天后，FWL的甲烷产量分别为358和478毫升/克挥发性固体，平均甲烷含量为70%。元素分析表明，FWL的化学组成为C(13.02)H(23.01)O(5.93)N(1)。由于种子微生物适应中温环境，在35摄氏度时获得了最高甲烷产量403毫升/克挥发性固体，而在20天结束时，25、45和55摄氏度下的甲烷产量分别为370、351和275毫升/克挥发性固体。添加碱度对甲烷产量有有利影响。用2克/升NaCl盐度的FWL稀释，在30天结束时产生了561毫升CH(4)/克挥发性固体。考虑到其高生物降解性（82.6%）和甲烷生产潜力，在生物反应器填埋场或厌氧消化池中对FWL进行厌氧消化，并优先控制碱度和盐度，可被视为解决当前紧急问题的可持续解决方案。
