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介绍了北京化工大学近年来酶法合成生物柴油工业化研究的结果。主要内容包括以下几个方面:高产脂肪酶菌株的选育、脂肪酶发酵工艺优化及放大、脂肪酶固定化方法、酶反应器放大、生物柴油分离精制及副产物甘油综合利用。该脂肪酶假丝酵母Candida sp.99-125在5 m3罐发酵活力不低于8 000 IU/mL,然后将该脂肪酶吸附固定在织物膜上并进行表面改性,用于搅拌罐式反应器生产每吨甲酯的需酶量仅为4.2 kg,产品经分离精制调质后,其各项指标完全符合德国生物柴油生产标准。副产物甘油可用于1,3-丙二醇发酵,30 L发酵罐中1,3-丙二醇的产量可达到76.1 g/L。
The results of the industrialization of enzymatic synthesis of biodiesel by Beijing University of Chemical Technology in recent years are introduced. The main contents include the following aspects: breeding of high-yield lipase strains, optimization and amplification of lipase fermentation process, immobilization of lipase, amplification of enzyme reactor, separation and purification of biodiesel, and comprehensive utilization of byproduct glycerol. The lipase Candida sp.99-125 Candida sp.99-125 in 5 m3 tank fermentation activity of not less than 8 000 IU / mL, and then the lipase adsorption on the fabric membrane and surface modification for stirred tank reaction The amount of enzyme required per tonne of methyl ester production was only 4.2 kg. After the product was refined and refined, all its indicators met the German biodiesel production standards. By-product glycerol can be used for 1,3-propanediol fermentation, the yield of 1,3-propanediol in the 30 L fermentor can reach 76.1 g / L.