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Sustainability 2015, 7(9), 11360-11377; doi:10.3390/su70911360

Emergy Evaluation of Different Straw Reuse Technologies in Northeast China

and
†,*
School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editors: Susan Krumdieck and Deepak Pant
Received: 8 July 2015 / Revised: 7 August 2015 / Accepted: 13 August 2015 / Published: 25 August 2015
(This article belongs to the Special Issue Sustainable Use of Biomass Energy)
View Full-Text   |   Download PDF [1265 KB, uploaded 25 August 2015]   |  

Abstract

Open burning of straw in China has degraded agricultural environments and has become a contributor to air pollution. Development of efficient straw-reuse technologies not only can yield economic benefits but also can protect the environment and can provide greater benefit to society. Thus, the overall benefits of straw-reuse technologies must be considered when making regional development planning and enterprise technology decisions. In addition, agricultural areas in China cross several climatic zones and have different weather characteristics and cultural conditions. In the present study, we assessed five types of straw-reuse technologies (straw-biogas production, -briquetting, -based power generation, -gasification, and -bioethanol production), using emergy analysis, in northeast China. Within each type, five individual cases were investigated, and the highest-performing cases were used for comparison across technologies. Emergy indices for comprehensive benefits for each category, namely, EYR, ELR, and ESI were calculated. Calculated indices suggest that straw-briquetting and -biogas production are the most beneficial technologies in terms of economy, environmental impact, and sustainability compared to straw-based power generation, -gasification, and -bioethanol production technologies. These two technologies can thus be considered the most suitable for straw reuse in China. View Full-Text
Keywords: emergy; straw-reuse technology; comprehensive analysis; northeast China emergy; straw-reuse technology; comprehensive analysis; northeast China
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zhang, X.; Ma, F. Emergy Evaluation of Different Straw Reuse Technologies in Northeast China. Sustainability 2015, 7, 11360-11377.

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