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首页> 美国卫生研究院文献>PLoS Clinical Trials >Life cycle energy efficiency and environmental impact assessment of bioethanol production from sweet potato based on different production modes
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Life cycle energy efficiency and environmental impact assessment of bioethanol production from sweet potato based on different production modes

机译：基于不同生产方式的红薯生物乙醇生产的生命周期能效和环境影响评价

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The bioethanol is playing an increasingly important role in renewable energy in China. Based on the theory of circular economy, integration of different resources by polygeneration is one of the solutions to improve energy efficiency and to reduce environmental impact. In this study, three modes of bioethanol production were selected to evaluate the life cycle energy efficiency and environmental impact of sweet potato-based bioethanol. The results showed that, the net energy ratio was greater than 1 and the value of net energy gain was positive in the three production modes, in which the maximum value appeared in the circular economy mode (CEM). The environment emission mainly occurred to bioethanol conversion unit in the conventional production mode (CPM) and the cogeneration mode (CGM), and eutrophication potential (EP) and global warming potential (GWP) were the most significant environmental impact category. While compared with CPM and CGM, the environmental impact of CEM significantly declined due to increasing recycling, and plant cultivation unit mainly contributed to EP and GWP. And the comprehensive evaluation score of environmental impact decreased by 73.46% and 23.36%. This study showed that CEM was effective in improving energy efficiency, especially in reducing the environmental impact, and it provides a new method for bioethanol production.
机译：在中国，生物乙醇在可再生能源中扮演着越来越重要的角色。基于循环经济理论，通过多联产整合不同资源是提高能源效率和减少环境影响的解决方案之一。在这项研究中，选择了三种生物乙醇生产模式来评估红薯基生物乙醇的生命周期能效和环境影响。结果表明，三种生产模式下的净能量比均大于1，净能量增益值为正，其中最大值出现在循环经济模式（CEM）中。环境排放主要发生在常规生产模式（CPM）和热电联产模式（CGM）的生物乙醇转化装置中，富营养化潜力（EP）和全球变暖潜力（GWP）是最重要的环境影响类别。与CPM和CGM相比，由于增加了回收利用，CEM对环境的影响显着下降，而植物种植单位主要是对EP和GWP的贡献。环境影响综合评价得分分别下降73.46％和23.36％。这项研究表明，CEM可以有效提高能源效率，尤其是在减少环境影响方面，它为生物乙醇生产提供了一种新方法。

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