2012年11月
Life cycle assessment of animal feeds prepared from liquid food residues: A case study of rice-washing water
Journal of Environmental Quality
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- 巻
- 41
- 号
- 6
- 開始ページ
- 1982
- 終了ページ
- 1988
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.2134/jeq2011.0442
- 出版者・発行元
- WILEY
Life cycle assessment (LCA) was used to compare the greenhouse gas (GHG) emissions and energy consumption of three methods used to produce animal feed from concentrated rice-washing water (CRW) and disposing of the rice-washing water through wastewater treatment. Four scenarios were compared using LCA: (i) producing concentrated liquid feed by centrifugation (CC) of CRW with wastewater treatment and discharge of the supernatant, (ii) producing concentrated liquid feed by heating evaporation (HC) of CRW, (iii) producing dehydrated feed by dehydration (DH) of CRW, and (iv) wastewater treatment and discharge of nonconcentrated ricewashing water (WT). The functional unit (FU) was defined as 1 metric ton of rice washed for cooking or processing. Our results suggested that the energy consumptions of CC, HC, DH, and WT were 108, 322, 739, and 242 MJ per FU, respectively, and the amounts of GHG emissions from CC, HC, DH, and WT were 6.4, 15.8, 45.5, and 22.5 kg of CO2 equivalents per FU, respectively. When the produced feed prepared from CRW was assumed to be transported 200 km to farms, CC and HC still emitted smaller GHGs than the other scenarios, and CC consumed the smallest amount of energy among the scenarios. Th e present study indicates that liquid feed production from CRW by centrifugation has a remarkably reducedm environmental impact compared with the wastewater treatment and discharge of rice-washing water. © American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.
- リンク情報
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- DOI
- https://doi.org/10.2134/jeq2011.0442
- PubMed
- https://www.ncbi.nlm.nih.gov/pubmed/23128755
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000311262400029&DestApp=WOS_CPL
- URL
- http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84869460481&origin=inward
- ID情報
-
- DOI : 10.2134/jeq2011.0442
- ISSN : 0047-2425
- ISSN : 1537-2537
- eISSN : 1537-2537
- PubMed ID : 23128755
- SCOPUS ID : 84869460481
- Web of Science ID : WOS:000311262400029