The effects of recycling loops in food waste management in Japan: Based on the environmental and economic evaluation of food recycling

被引:69
|
作者
Takata, Miki [1 ]
Fukushima, Kazuyo [2 ]
Kino-Kimata, Noriko [1 ]
Nagao, Norio [3 ]
Niwa, Chiaki [1 ]
Toda, Tatsuki [1 ]
机构
[1] Soka Univ, Grad Sch Engn, Hachioji, Tokyo 1928577, Japan
[2] Watanabe Oyster Lab Co Ltd, Hachioji, Tokyo 1920154, Japan
[3] Univ Putra Malaysia, Inst Biosci, Upm Serdang 43400, Selangor, Malaysia
关键词
Recycling loop; Life cycle assessment; Life cycle cost; Composting; Animal feed; Bio-gasification; MUNICIPAL SOLID-WASTE; DISPOSAL OPTIONS; COMPOST;
D O I
10.1016/j.scitotenv.2012.05.049
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In Japan, a revised Food Recycling Law went into effect in 2007 to promote a "recycling loop" that requires food industries to purchase farm products that are grown using food waste-derived compost/animal feed. To realize and expand food recycling, it is necessary to evaluate how the recycling facilities work in the recycling loop. The purpose of this study is to assess the environmental and economic efficiency of the food recycling facilities that are involved in the recycling loop, which are also known as looped facilities. The global warming potential and running cost of five looped facilities were evaluated by LCA (life cycle assessment) and LCC (life cycle cost) approaches: machine integrated compost, windrow compost, liquid feed, dry feed, and bio-gasification. The LCA results showed low total GHG (greenhouse gas) emissions of - 126 and - 49 kg-CO2/t-waste, respectively, for dry feed and bio-gasification facilities, due to a high substitution effect. The LCC study showed a low running cost for composting facilities of - 15,648 and - 18,955 yen/t-waste, respectively, due to high revenue from the food waste collection. It was found that the mandatory reporting of food waste emitters to the government increased collection fees: however, the collection fee in animal feed facilities was relatively low because food waste was collected at a low price or nutritious food waste was purchased to produce quality feed. In the characterisation survey of various treatment methods, the composting facilities showed a relatively low environmental impact and a high economic efficiency. Animal feed facilities had a wide distribution of the total GHG emissions, depending on both the energy usage during the drying process and the substitution effect, which were related to the water content of the food waste and the number of recycled products. In comparison with incineration, the majority of the food recycling facilities showed low GHG emissions and economic effectiveness. This paper also reported on the effects of recycling loops by comparing looped and non-looped animal feed facilities, and confirmed that the looped facilities were economically effective, due to an increased amount of food waste collection. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码:309 / 317
页数:9
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