摘要
首次将生活垃圾分类收集、资源回收与填埋处置相结合,借助自行设计和建设的两座库容为150m3的垃圾填埋单元,分析了垃圾分类收集与资源回收对填埋库容节省量和填埋初期两个月内物流特征的影响。结果显示,每分类收集与资源化处理100t城市生活垃圾,可直接为后续填埋处置节省库容量约57.3m3。在18项渗滤液指标当中,次生生活垃圾填埋单元渗滤液8项指标包括Cu2+、Pb2+、色度、Total-P、SS、Cd2+、Zn2+和Cl-均高于原始生活垃圾填埋单元渗滤液的1.5倍以上,5项指标包括NH4+、Total-N、Mn、BOD5和CODcr略高,3项指标pH、TCr和EC二者基本相等,只有Fe和DO低于原始生活垃圾填埋单元。另外,在整个试验过程中,次生生活垃圾填埋单元的填埋气体中甲烷浓度明显高于原始生活垃圾填埋单元。因此,生活垃圾分类收集与资源化处理不仅可以有效地节省后续垃圾填埋库容量,而且有利于渗滤液的集中化处理,加速有机物的降解,促进填埋堆体提前进入产甲烷阶段。
In this paper,effect of municipal solid waste classification on material change in landfill unit at its early stage was investigated as compared with that in the conventional mixed landfill unit. Results showed that approximate 0.573 m^3 could be saved from per ton of waste due to classification and recycle. Among eighteen leachate indexes,eight of them including Cu^2＋,Pb^2＋ ,Chroma,Total-P,SS,Cd^2＋ ,Zn^2＋ and Cl^- in the unit filled with classified waste were over 1.5 times higher than those in the conventional unit. Five of them involving NH4^＋ ,Total-N.Mn.BOD5 and CODcr were slightly higher in the classified unit. pH,TCr and EC were equivalent in both units. However,Fe and DO were lower in the classified unit. In addition ,methane concentration in landfill gas of classified unit was much higher in comparison with that of the conventional unit over the whole experimental period. All these results obtained at the early stage of landfill indicate that waste classification could be an effective method in saving landfill storage capacity,centralizing leachate pollutants, accelerating the decomposition rate of organic waste ,and promoting the emergence of methane-producing stage of landfill.
出处
《科技通报》
2008年第5期700-705,共6页
Bulletin of Science and Technology
基金
国家863计划项目(2005AA644010)
浙江省科技厅重大科技专项社会发展重点项目(2006C13066)
关键词
城市生活垃圾
分类收集
垃圾渗滤液
垃圾填埋
填埋气体
municipal solid waste
collection of classified solid waste
leachate
landfill
biogas
