Environmental assessment of Conventional landfill and Renewable landfill from the LCA perspective with the aid of EASEWASTE model
Two types of landfill technologies, namely renewable landfill (RL) and conventional landfill(CL) were compared from the point view of life cycle assessment (LCA) in this work. Conventional landfill is presented widely in the waste management systems in the world, while renewable landfill is a new idea and has been developed in the last decades. The biggest difference between the two types of landfill is that aged refuse generated would be reused in renewable landfill, while that in conventional landfill would be neglected. A LCA model -EASEWASTE has been introduced to compare the environmental performance of the two styles of landfills, and the sub-modules of landfill technology and bio-technology in the model were applied to simulate the conventional landfill and renewable landfill according to their characterization and structure in the modules, respectively. It was found that the most serious problem for landfill in China is the spoiled groundwater due to the lower collection rate of leachate, followed with acidification and global warming owing to the fugitive emission of landfill gas. The critical constituent for environmental affect was ammonia in leachate, and it contributed to both of the nutrient enrichment and spoiled ground water significantly. Renewable landfill could reduce the potential environmental impact to the surrounding areas through shorten the aftercare time period and reduced the release of indeterminate volumes of leachates and landfill gas (LFG). Interpretation of comparison results showed that the spoiled groundwater would reduce significantly in renewable landfill, with the values of 86.60548 PE/t ww. The global warming potential would decrease about 0.005768 PE/t ww, and the human toxicity via different received compartments of soil, water and air would also decrease about 0.032139 PE/t ww, 0.016135 PE/t ww and 0.015457 PE/t ww respectively, while nutrient enrichment increase about 0.03121 PE/t ww, owing that ammonia nitrogen in leachate discharged into marine water instead of ground water in conventional landfill. Moreover, renewable landfill would improve a better environmental performance, if the secondly production resource of aged refuse and available volumes for new landfill were taken into accounted. Hence, renewable landfill is one of the good choices for landfill management, and it would also be the potential reclamation approache for some un-sanitary landfill or open dumping sites.
LCA Renewable landfill Conventional landfill Environmental assessment EASEWASTE
Lou Ziyang Thomas Hфlund Christensen Simone Manfredi Zhao Youcai Alessio Boldrin Chen Dezhen
Institute of Environment & Resources DTU, Technical University of Denmark, Lyngby, Denmark The State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science an
国际会议
The 3rd International Conference on Waste Management and Technology(第三届固体废物管理与技术国际研讨会)
北京
英文
439-449
2008-11-05（万方平台首次上网日期，不代表论文的发表时间）