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Economic and environmental effects of rice-straw bioethanol production in Vietnam
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Economic and environmental effects of rice-straw bioethanol production in Vietnam
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Journal Article
Economic and environmental effects of rice-straw bioethanol production in Vietnam
2013
Overview
Bioethanol production from rice-straw is carbon neutral and less competitive with food supplies, so it provides great possibilities for resolving global issues. This study aims to conduct economic and environmental evaluations on rice-straw bioethanol production in Vietnam, where huge amounts of unused rice-straw are available, by a top–down life-cycle assessment by means of an input–output table. The economic impacts are evaluated by total costs, total production, and total added value; the environmental impacts are assessed by greenhouse gas emissions with consideration of life-cycle, i.e., the plant construction phase, production phase, and plant scrapping phase. Three technology scenarios are assumed: (1) present technology, (2) advanced technology with higher conversion rates, and (3) innovative technology with a new production method and economies of scale. The results demonstrate that, first, rice-straw bioethanol production can reduce annual gasoline consumption by more than 20 %, and plant construction costs account for 8–22 % of the total investment in Vietnam. Second, under the present technology, both economic and environmental net benefits are negative. However, the innovative technology makes both benefits positive. Third, under the advanced technology, the environmental net benefit is positive, while the economic net benefit is negative. This implies that satisfying economic viability is more difficult than attaining environmental viability in rice-straw bioethanol production. Therefore, technological development and transfer are necessary to make rice-straw bioethanol production feasible.
Publisher
Springer Japan,Springer Nature B.V
Subject
