期刊
INDUSTRIAL CROPS AND PRODUCTS
卷 123, 期 -, 页码 331-340出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.indcrop.2018.07.003
关键词
Agricultural residue; Biorefinery scheme; Hydrothermal process; LCA; Sustainability; Valorization
资金
- Xunta de Galicia [ED431F 2016/001]
- Spanish Ministry of Economy and Competitiveness [CTQ2016-81848-REDT, RYC-2014-14984, IJCI-2015-25305]
- STAR-ProBio project - European Union [727740]
- Xunta de Galicia
- FEDER (EU)
- Galician Competitive Research Group [GRC 2013-032]
- CRETUS Strategic Partnership [AGRUP2015/02]
In the food industry, the brewing sector holds a strategic economic position since beer is the most consumed alcoholic beverage in the world. Brewing process involves the production of a large amount of lignocellulosic residues such as barley straw from cereal cultivation and brewer's spent grains. This study was aimed at developing a full-scale biorefinery system for generating bio-ethanol and xylooligosaccharides (XOS) considering the mentioned residues as feedstock. Life Cycle Asssessment (LCA) methodology was used to investigate the environmental consequences of the biorefinery system paying special attention into mass and energy balances in each production section to gather representative inventory data. Biorefinery system was divided in five areas: i) reconditioning and storage, ii) autohydrolysis pretreatment, iii) XOS purification, iv) fermentation and v) bio-ethanol purification. LCA results identified two environmental hotspots all over the whole biorefinery chain: the production of steam required to achieve the large autohydrolysis temperature (responsible for contributions higher than 50% in categories such as acidification and global warming potential) and the production of enzymes required in the simultaneous saccharification and fermentation (> 95% of contributions to terrestrial and marine aquatic ecotoxicity potentials). Since enzymes production involves high energy intensive background processes, the most straightforward improvement challenge should be focused on the production of steam. An alternative biorefinery scenario using wood chips as fuel source to produce heating requirements instead of the conventional natural gas was environmentally evaluated reporting improvements ranging from 44% to 72% in the categories directly affected by this hotspot.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据