Environmental Implications of Ethanol Production from Kitchen Garbage
This article investigates the. environmental performance of ethanol fermentation from kitchen garbage conversion scenarios based on a life cycle assessment perspective. Ethanol fermentation from kitchen garbage could reduce environmental pollution and obtain high-value product, but the production process can easily lead to secondary pollution and lose the initial meaning of resource recovered use. To investigate the environmental impacts of ethanol production, we used life cycle inventory, modeled scenarios and calculated six aspects including GWP, ODP, AP, EP, POCP and DUST. The classification results showed the value of the environment impact potential respectively. The rank of impact potential according to normalized results in descending order is GWP>AP>DUST>EP>ODP>POCP. Global warming potential impacts are still the most significant penitential factor even without biogenic CO2 emission. And biogenic CO2 emission is not included in global warming impacts in the strict sense, as the biological CO2 produced by the process of biodegradable waste is the inevitable result of natural processes. Carbon dioxide emission in ethonal product process from kitchen garbage is divided to biogenic CO2 and fossil CO2.But biogenic CO2 accounts for only 6％ of the total emission. Global warming impacts are still the most significantly penitential factor even without biogenic CO2 emission. The rank of impact potential according to weight factor in descending order is AP>DUST>GWP>ODP>EP>POCP. Acid Potential is the most significant of the six factors. The weight factor of AP is almost twice as much as that of GWP. This is because there is a large gap between baseline level and the target level, the sulfur oxides and nitrogen oxides are the focus of control in these years. Extending the life cycle assessment scope to taking the product and by-product which can substitute existing energy consumption, into account, environmental impact potential will decrease significantly.
environmental implications kitchen garbage life cycle assessment ethanol
Wei SU Hongzhi MA Frank Matongo MUNGOLE Qunhui WANG
Department of Environmental Engineering, University of Science and Technology Beijing, China, 100083
国际会议
The Sixth International Conference on Waste Management and Technology(第六届固体废物管理与技术国际会议 ICWMT 6)
苏州
英文
27-30
2011-08-30（万方平台首次上网日期，不代表论文的发表时间）