著者
海老原 格
巻号頁・発行日
2012

科学研究費助成事業(科学研究費補助金)研究成果報告書:研究活動スタート支援2010-2011
著者
下野 綾子
巻号頁・発行日
2012

科学研究費助成事業(科学研究費補助金)研究成果報告書:研究活動スタート支援2010-2011
著者
Nawahdah Mamoun
巻号頁・発行日
2013-03

Thesis (Ph. D. in Information Science)--University of Tsukuba, (A), no. 6647, 2013.3.25
著者
森安 孝夫 モリヤス タカオ Moriyasu Takao
出版者
中央ユーラシア学研究会
雑誌
内陸アジア言語の研究 (ISSN:13415670)
巻号頁・発行日
vol.17, pp.117-170, 2002-09

庄垣内正弘教授還暦記念 チュルク学特集号 / Papers in Honour of Professor Masahiro SHOGAITO on his 60th Birthday
著者
Matsuda Takeshi Yano Junya Hirai Yasuhiro Sakai Shin-ichi
出版者
Springer Verlag
雑誌
The International Journal of Life Cycle Assessment (ISSN:09483349)
巻号頁・発行日
vol.17, no.6, pp.743-752, 2012-07
被引用文献数
47

[Purpose]Source-separated collection of food waste has been reported to reduce the amount of household waste in several cities including Kyoto, Japan. Food waste can be reduced by various activities including preventing edible food loss, draining moisture, and home composting. These activities have different potentials for greenhouse gas (GHG) reduction. Therefore, we conducted a life-cycle inventory analysis of household waste management scenarios for Kyoto with a special emphasis on food waste reduction activities. [Methods]The primary functional unit of our study was “annual management of household combustible waste in Kyoto, Japan.” Although some life-cycle assessment scenarios included food waste reduction measures, all of the scenarios had an identical secondary functional unit, “annual food ingestion (mass and composition) by the residents of Kyoto, Japan.” We analyzed a typical incineration scenario (Inc) and two anaerobic digestion (dry thermophilic facilities) scenarios involving either source-separated collection (SepBio) or nonseparated collection followed by mechanical sorting (MecBio). We assumed that the biogas from anaerobic digestion was used for power generation. In addition, to evaluate the effects of waste reduction combined with separate collection, three food waste reduction cases were considered in the SepBio scenario: (1) preventing loss of edible food (PrevLoss); (2) draining moisture contents (ReducDrain); and (3) home composting (ReducHcom). In these three cases, we assumed that the household waste was reduced by 5%. [Results and discussion]The GHG emissions from the Inc, MecBio, and SepBio scenarios were 123.3, 119.5, and 118.6 Gg CO2-eq/year, respectively. Compared with the SepBio scenario without food waste reduction, the PrevLoss and ReducDrain cases reduced the GHG emissions by 17.1 and 0.5 Gg CO2-eq/year. In contrast, the ReducHcom case increased the GHG emissions by 2.1 Gg CO2-eq/year. This is because the biogas power production decreased due to the reduction in food waste, while the electricity consumption increased in response to home composting. Sensitivity analyses revealed that a reduction of only 1% of the household waste by food loss prevention has the same GHG reduction effect as a 31-point increase (from 50% to 81%) in the food waste separation rate. [Conclusions]We found that prevention of food losses enhanced by separate collection led to a significant reduction in GHG emissions. These findings will be useful in future studies designed to develop strategies for further reductions in GHG emissions.
出版者
筑波大学教育制度研究室
雑誌
教育制度研究紀要
巻号頁・発行日
no.8, pp.85-86, 2013-02