Keshwani Deepak R, Cheng Jay J
Department of Biological and Agricultural Engineering, North Carolina State University, Raleigh, NC 27695-7625, USA.
Bioresour Technol. 2009 Feb;100(4):1515-23. doi: 10.1016/j.biortech.2008.09.035. Epub 2008 Oct 30.
Switchgrass is a promising feedstock for value-added applications due to its high productivity, potentially low requirements for agricultural inputs and positive environmental impacts. The objective of this paper is to review published research on the conversion of switchgrass into bioethanol and other value-added products. Environmental benefits associated with switchgrass include the potential for carbon sequestration, nutrient recovery from runoff, soil remediation and provision of habitats for grassland birds. Pretreatment of switchgrass is required to improve the yields of fermentable sugars. Based on the type of pretreatment, glucose yields range from 70% to 90% and xylose yields range from 70% to 100% after hydrolysis. Following pretreatment and hydrolysis, ethanol yields range from 72% to 92% of the theoretical maximum. Other value-added uses of switchgrass include gasification, bio-oil production, newsprint production and fiber reinforcement in thermoplastic composites. Future prospects for research include increased biomass yields, optimization of feedstock composition for bioenergy applications, and efficient pentose fermentation to improve ethanol yields.
柳枝稷因其高产、对农业投入的潜在低需求以及积极的环境影响，是一种用于增值应用的有前景的原料。本文的目的是综述已发表的关于将柳枝稷转化为生物乙醇和其他增值产品的研究。与柳枝稷相关的环境效益包括碳固存潜力、径流养分回收、土壤修复以及为草原鸟类提供栖息地。需要对柳枝稷进行预处理以提高可发酵糖的产量。根据预处理类型，水解后葡萄糖产量范围为70%至90%，木糖产量范围为70%至100%。经过预处理和水解后，乙醇产量为理论最大值的72%至92%。柳枝稷的其他增值用途包括气化、生物油生产、新闻纸生产以及热塑性复合材料中的纤维增强。未来的研究前景包括提高生物质产量、优化用于生物能源应用的原料组成以及高效戊糖发酵以提高乙醇产量。
