气候变化领域集成服务门户(CCPortal): Greenhouse gas emission reductions by reusing and recycling used clothing in Japan

CCPortal

DOI	10.3390/su12198214
	Greenhouse gas emission reductions by reusing and recycling used clothing in Japan
	Semba T.; Sakai Y.; Ishikawa M.; Inaba A.
发表日期	2020
ISSN	20711050
卷号	12 期号:19
英文摘要	According to the Ellen MacArthur Foundation, 73% of used clothing is landfilled or incinerated globally and greenhouse gas (GHG) emissions from fabric manufacturing in 2015 amounted to 1.2 billion tons. It must be reduced in the future, especially by reusing and recycling used clothing. Based on this perspective, researchers calculated the energy consumption and GHG emissions associated with reusing and recycling used clothing globally with a life cycle assessment (LCA). However, no study was conducted so far to estimate the total GHG emission reductions in Japan by reusing and recycling used clothing. In this study, the amount of used clothing currently discharged from households as combustible and noncombustible waste and their fiber types were estimated using literature. Then, the methods for reusing and recycling of used clothing were categorized into the following 5 types based on fiber type, that is, "reuse overseas," "textile recycling to wipers," "fiber recycling," "chemical recycling" and "thermal recycling." After that, by applying LCA, the GHG emission reductions by above 5 methods were estimated, based on the annual discharged weights of each fiber type. Consequently, the total GHG emissions reductions by reusing and recycling 6.03 × 108 kg of used clothing totally were estimated around 6.60 × 109 kg CO2e, to range between 6.57 × 109 kg CO2e and 6.64 × 109 kg CO2e, which depended on the type of "chemical recycling." The largest contribution was "reuse overseas," which was 4.01 × 109 kg CO2e corresponded to approximately 60% of the total reduction. Where, it was assumed that used clothing were exported from Japan to Malaysia which was currently the largest importing country. In this case, GHG emissions to manufacture new clothing in China, the largest country currently to export them to Japan, can be avoided, which are 29.4 kg CO2e and 32.5 kg CO2e respectively for 1 kg jeans and 1 kg T-shirts. Adding the GHG emissions for overseas transportation to this, on average, 32.0 kg CO2e per kg of used clothing was reduced by "reuse overseas," which was 19.6 times larger than GHG emissions by incineration, 1.63 kg CO2e per kg, in which carbon neutrality for cotton was not counted. As the result, the total GHG emission reductions above mentioned, around 6.60 × 109 kg CO2e, corresponds to 70% of the GHG emissions by incineration of total household garbage in Japan. © 2020 by the authors.
英文关键词	Chemical recycling; GHG emissions; Life cycle assessment; Reclaimed fiber; Reuse; Thermal recycling; Used clothing
scopus关键词	clothing industry; emission control; greenhouse gas; incineration; manufacturing; recycling; China; Japan; Malaysia; Gossypium hirsutum
来源期刊	Sustainability (Switzerland)
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/176597
作者单位	Department of Home Economics, Iida Women's Junior College, Nagano, 395-8567, Japan; Department of Environmental Chemistry and Chemical Engineering, School of Advanced Engineering, Kogakuin University, Tokyo, 163-8677, Japan
推荐引用方式 GB/T 7714	Semba T.,Sakai Y.,Ishikawa M.,et al. Greenhouse gas emission reductions by reusing and recycling used clothing in Japan[J],2020,12(19).
APA	Semba T.,Sakai Y.,Ishikawa M.,&Inaba A..(2020).Greenhouse gas emission reductions by reusing and recycling used clothing in Japan.Sustainability (Switzerland),12(19).
MLA	Semba T.,et al."Greenhouse gas emission reductions by reusing and recycling used clothing in Japan".Sustainability (Switzerland) 12.19(2020).