The sustainability of transportation biofuel production value chains is under discussion as a consequence of the implementation of the European Union Bioeconomy Strategy and renewable energy production. Greenhouse gas emissions from the biomass produced for biofuel, and the energy required during the production process are, in many cases, greater than the emission reductions from the biofuels that are produced and used to replace fossil fuels. In this study, the sustainability of bioethanol production from short rotation coppice Salix schwerinii was considered from cultivation and harvesting to biofuel production and distribution. The sustainability of the full value chain was evaluated according to the European Union Renewable Energy Directive and calculations of greenhouse gas emission savings (%) from biofuel production were compared to a reference fossil fuel (gasoline). For comparison, four bioethanol production scenarios were developed, and specific attention was focused on the utilization of waste-based organic fertilizers (for biomass production) and on carbon dioxide capture at the fermentation stage, and their effects on value chain greenhouse gas emissions. Based on our evaluation, Salix bioethanol production achieved 60% emission savings compared to the fossil reference (requirement for installations that will commence operations until end of December 2020). When waste based organic fertilizers were used in the Salix biomass production, 65% emission savings were achieved (requirement for the installations that will commence operations from 2021). Moreover, the value chain sustainability and greenhouse gas emissions balance were improved by the carbon dioxide captured during the bioethanol fermentation stage.

由于执行了《欧洲联盟生物经济战略》和可再生能源生产，运输生物燃料生产价值链的可持续性正在讨论中。在许多情况下，为生物燃料生产的生物质所产生的温室气体排放以及生产过程中所需的能量，大于所生产并用于替代化石燃料的生物燃料所产生的减排量。在这项研究中，从种植，收获到生物燃料的生产和分配，都考虑了短轮矮灌木林柳的生物乙醇生产的可持续性。根据欧洲可再生能源指令评估了整个价值链的可持续性，并将生物燃料生产产生的温室气体排放节省量（％）与参考化石燃料（汽油）进行了比较。为了进行比较，开发了四种生物乙醇生产方案，并特别关注了基于废物的有机肥料的利用（用于生物质生产）和发酵阶段的二氧化碳捕集及其对价值链温室气体排放的影响。根据我们的评估，柳杉生物乙醇生产与化石参考相比节省了60％的排放量（安装要求直到2020年12月才开始运行）。当废料中使用有机肥料时，柳柳生物量生产，实现了65％的排放节省（对从2021年开始运营的装置的要求）。此外，在生物乙醇发酵阶段捕获的二氧化碳改善了价值链的可持续性和温室气体排放平衡。