Ecological accounting for an integrated &quot;pig-biogas-fish&quot; system based   on emergetic indicators

doi:10.1016/j.ecolind.2014.04.033

CORC > 北京大学 > 工学院

	Ecological accounting for an integrated "pig-biogas-fish" system based on emergetic indicators
	Wu, X. F. ; Wu, X. D. ; Li, J. S. ; Xia, X. H. ; Mi, T. ; Yang, Q. ; Chen, G. Q. ; Chen, B. ; Hayatf, T. ; Alsaedi, A.
刊名	ecological indicators
	2014
关键词	Ecological indicators Emergy Urbanization Biogas Ecological economy GREENHOUSE-GAS EMISSIONS NONRENEWABLE ENERGY-COST CORN-ETHANOL PRODUCTION LIFE-CYCLE ASSESSMENT EMBODIED ENERGY RURAL CHINA ENVIRONMENTAL DISPERSION CONSTRUCTED WETLAND RESOURCE ANALYSIS CARBON EMISSION
DOI	10.1016/j.ecolind.2014.04.033
英文摘要	With the expansion of urbanization in China, the integrated biogas-utilization system has gained its popularity for both renewable energy production and multi-level utilization of organic waste. To appraise the ecological performance of the integrated biogas system, systematic accounting is undertaken for an integrated "pig-biogas-fish" system in Hubei province, China. Based on Odum's concept of embodied solar energy as a unified measure for environmental resources, human labors and purchased goods, a set of emergetic indicators are employed to quantify the system sustainability. The results reveal that in a 20-year designed lifetime scenario, 94.69% of the total emergy inputs for the "pig-biogas-fish" system are attributed to purchased social resources. Three kinds of products, namely pig, biogas, fish are taken into consideration, and transformity of the "pig-biogas-fish" system is calculated as 1.26E + 05 seJ/J. Compared with the Chinese conventional agriculture system, the integrated biogas system shows a higher sustainability. Given that most biogas systems have a lifespan less than 20 years, for the "pig-biogas-fish" system, six other scenarios with different lifespans are studied to investigate the impact of the lifespan on sustainability. The findings suggest that the "pig-biogas-fish" system should be well operated for at least 8 years to prove its advantage in ecological economy over the conventional agriculture system. This has essential policy implications that local government should strengthen subsequent management on biogas production to extend the practical service life of the biogas system. (C) 2014 Elsevier Ltd. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000343853000022&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Biodiversity Conservation; Environmental Sciences; SCI(E); EI; SSCI; 11; ARTICLE; qyang@mail.hust.edu.cn; aalsaedi@hotmail.com; ,SI; 189-197; 47
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/154168]
专题	工学院
推荐引用方式 GB/T 7714	Wu, X. F.,Wu, X. D.,Li, J. S.,et al. Ecological accounting for an integrated "pig-biogas-fish" system based on emergetic indicators[J]. ecological indicators,2014.
APA	Wu, X. F..,Wu, X. D..,Li, J. S..,Xia, X. H..,Mi, T..,...&Alsaedi, A..(2014).Ecological accounting for an integrated "pig-biogas-fish" system based on emergetic indicators.ecological indicators.
MLA	Wu, X. F.,et al."Ecological accounting for an integrated "pig-biogas-fish" system based on emergetic indicators".ecological indicators (2014).