日本食品废物不同资源化技术下的碳排放比较研究

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Abstract Based on life cycle assessment (LCA), survey data and statistical data from the Ministry of Agriculture, Forestry and Fisheries of Japan and Ministry of Environment of Japan were used to evaluate CO₂ emissions of food waste under different recycling or non-recycling treatment systems. The research makes comparisons of CO₂ emissions reduction caused by 10 kinds of recycling technology and 3non-recycling (mainly incineration) treatment technologies. The results show that, pretreatment and treatment stages combined accounts for almost 85% CO₂ emissions, and the least is recycling stage, which can offset part of the emissions. As for the total emission, methanation (circulating digestive liquids) is the most favorable one with 380.6kg CO₂e/t reduction a year. In addition, it turns out that methanation (only) and fertilization can reduce CO₂ emissions, while solidification of combustible waste (RDF), methanation (mixed with underground water), feed (liquefaction), methanation (mixed with incineration), carbonization, ethanol, feed (extra drying) and incineration (power generation), incineration (no power generation), incineration of combustible waste (no power generation) all increase the CO₂ emission successively. While excluding recycling products transportation, methanation (mixed with underground water) will produce less CO₂ emission than the feed (liquefaction), and the other order will remain the same according to the advantages and disadvantages of technologies.

Key words： food waste recycling technology CO₂ emission methanation (circulating digestive liquids)

Received: 15 June 2020

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X705

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	JIANG Xiao-qun
	TAN Ling-zhi
	SUN Yue-yang

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JIANG Xiao-qun,TAN Ling-zhi,SUN Yue-yang. Comparative study on CO₂ emissions under different recycling technologies for food waste in Japan[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(2): 959-966.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I2/959

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