Research on creating sustainable landfill which stabilizes for twenty to thirty years

即使实现了所谓的循环社会，垃圾填埋场仍然需要处理回收过程中的残留物。固体废物填埋可能成为长期环境风险的来源，或对下一代的负面遗产。本研究从以下几个方面提出了“可持续社会中的垃圾填埋”策略。1)社会可接受性：通过问卷调查的方式调查公民对垃圾填埋场的环境和社会影响的关注程度。对垃圾填埋场的负面印象是反对新建垃圾填埋场的主要原因，而当市民面对新建垃圾填埋场的现实时，反对的声音就会增加。2)垃圾填埋场的垃圾数量和质量：通过对城市生活垃圾填埋场的大量采样，对垃圾填埋场的有机物和重金属进行了表征。评估了几种可能的废物管理方案，以提供更好的策略来减少堆填区的有机物和重金属含量。3)垃圾预处理：对垃圾预处理的技术和设备进行了广泛的文献调查，并提出了未来的展望，包括具有预处理功能的垃圾填埋场。4)低有机质垃圾填埋场稳定化机理：采用填埋焚烧残余物和不可燃垃圾的渗滤试验，研究了垃圾填埋场中有机物和重金属的行为。并对腐殖质的淋溶行为进行了分析。5)填埋场的长期稳定：通过收集日本的渗滤液质量数据，分析了稳定指标，如BOD。

Even when so-called recycle-oriented society was realized, landfill is still needed to dispose of residues from recycling process. Solid waste landfill possibly becomes the source of long-term environmental risk, or negative heritage to the next generation In this study, the strategy for "landfill in sustainable society" were proposed in the following aspects.1)Social acceptability : Citizen's concerns on environmental and social impacts from a landfill were surveyed by questionnaires. Negative image of landfill was found to be the main reason for opposition to construction of new landfill, and opposition increases once citizen faces with the reality of construction.2)Waste amount and quality in a landfill : By taking many samples from MSW landfills, landfilled wastes were characterized in terms of organics and heavy metals. Several possible waste management scenarios were assessed to give better strategy to reduce organics and heavy metal contents in landfills.3)Pretreatment of waste : Extensive literature surveys were done on technologies and equipments for pretreatment of waste, and future perspectives were presented including a landfill which has a function of pretreatment itself.4)Stabilization mechanism of landfill with low organic content : Behavior of organics and heavy metals were studied by lysimeter test in which incineration residues and incombustible waste are packed. Leaching behavior of humic substances were also analyzed.5)Long-term stabilization of landfill : Stabilization index, such as BOD, were analyzed by collecting data on leachate quality in Japan.