EFFICIENT PRODUCTION of LACTIC ACID from DISTILLERS GRAINS HYDROLYSATES by Rhizopus oryzae CICC41411
(0) Lignocellulosic biomass-derived sugars is considered to be an economically attractive carbohydrate feedstock for large-scale fermentation of bulk chemicals such as lactic acid (LA).The aim of this study was to investigate the possibility of LA production from distillers grains hydrolysates (DGHs) by the Rhizopus oryzae CICC41411 and to optimize the biological conversion of reducing sugar into LA to evaluate the culture conditions.The effects.of factors such as nitrogen source, inoculations size, CaCO3 addition, pH value and fermentation time on the lactic acid concentration (LAC) and the reducing sugars utilization rate (RSUR) were researched.The results show that ammonium chloride is the most favorable nitrogen source for LA production by Rhizopus.Oryzae CICC41411, the optimal fermentation conditions are inoculation size of 2.5% seed culture, CaCO3 addition of 80 g·L-1, fermentation time of 96 h and culture pH of 6.0.This study provides an encouraging means of producing LA from lignocellulosic resource such as the low-cost distillers grains.
Rhizopus oryzae Distiller grains hydrolysates (DGHs) Lactic acid (LA) Reducing sugars
Hai-wei Ren Jin-ping Li Yi Zhang Zhi-zhong Li
School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China;West Western China Energy & Environment Research Center, Lanzhou University of Technology, Lanzhou 730050 School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China
国际会议
The Eighth China National Conference on Functional Materials and Applications(第八届中国功能材料及其应用学术会议)
哈尔滨
英文
689-696
2013-08-23（万方平台首次上网日期，不代表论文的发表时间）