纤维乙醇及渗透汽化原位分离技术研究进展

生物乙醇特别是纤维乙醇是未来化石燃料的重要替代品之一。原位分离发酵技术是近年来兴起的一种新型发酵技术,可使菌体密度较分批培养有显著的提高,最终提高特定产物的生产率。分批发酵过程中产生的乙醇会抑制菌体生长,开发一种解除乙醇抑制作用的发酵方法有助于获得高密度的菌体,从而提高乙醇的产量。近年来渗透汽化膜技术迅速发展,逐步成为乙醇发酵原位分离的理想方法。本文就纤维乙醇、原位分离以及渗透汽化技术涉及的膜材料、耦合技术等研究应用现状进行阐述,并对其研究应用前景进行了展望。

Research in Progress of Cellulosic Ethanol and Evaporation In-situ Product Removal Techniques

Fuel-ethanol from biomass resources,especially from cellulosic material is a promising sub- stitutive product for limited crude oil resources.Application of in situ product removal techniques in ethanol fermentation is a new techniques,which enhance the density of yeast,finally enhance the yield of the specific product-ethanol.Because of the density of ethanol increasing,the growth of yeast is inhibited,but the inhibi- tion must be eliminated to enhance the density of yeast and the yield of ethanol.Recently pervaporation technology has been used in many kinds of industries,and which is the key method of in situ product removal techniques in ethanol fermentation.The cellulosic ethanol and pervaporation in-situ product removal tech- niques for bioethanol recovery have been reviewed in detail with emphasis on pervaporation membrane materials, coupling techniques,recent applications,and the development trend is prospected.