Yibin University, Solid-state Fermentation Resource Utilization Key Laboratory of Sichuan Province, Yibin 644000, China.
Yibin University, Solid-state Fermentation Resource Utilization Key Laboratory of Sichuan Province, Yibin 644000, China; CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China; Key Laboratory of Wuliangye-flavor Liquor Solid-state Fermentation, China National Light Industry, Yibin 644000, China; College of Architecture and Environment, Sichuan University, Chengdu 610065, China.
J Biosci Bioeng. 2021 May;131(5):461-468. doi: 10.1016/j.jbiosc.2020.12.015. Epub 2021 Jan 30.
Increasing ethanol demand and public concerns about environmental protection promote the production of lignocellulosic bioethanol. Compared to that of starch- and sugar-based bioethanol production, the production of lignocellulosic bioethanol is water-intensive. A large amount of water is consumed during pretreatment, detoxification, saccharification, and fermentation. Water is a limited resource, and very high water consumption limits the industrial production of lignocellulosic bioethanol and decreases its environmental feasibility. In this review, we focused on the potential for reducing water consumption during the production of lignocellulosic bioethanol by performing pretreatment and fermentation at high solid loading, omitting water washing after pretreatment, and recycling wastewater by integrating bioethanol production and anaerobic digestion. In addition, the feasibility of these approaches and their research progress were discussed. This comprehensive review is expected to draw attention to water competition between bioethanol production and human use.
随着乙醇需求的增加和公众对环境保护的关注，木质纤维素生物乙醇的生产得到了推动。与淀粉和糖基生物乙醇生产相比，木质纤维素生物乙醇的生产耗水量大。在预处理、解毒、糖化和发酵过程中会消耗大量的水。水是一种有限的资源，高耗水量限制了木质纤维素生物乙醇的工业生产，降低了其环境可行性。在本综述中，我们通过在高固体负荷下进行预处理和发酵、省略预处理后的水洗以及通过整合生物乙醇生产和厌氧消化来回收废水，重点研究了通过提高预处理和发酵的固体负荷、省略预处理后的水洗以及整合生物乙醇生产和厌氧消化来减少木质纤维素生物乙醇生产过程中的耗水量的潜力。此外，还讨论了这些方法的可行性和研究进展。本综述旨在引起人们对生物乙醇生产与人类用水之间的水资源竞争的关注。
