文献类型：期刊文献

英文题名：Fermentative production of l-lactic acid from hydrolysate of wheat bran by Lactobacillus rhamnosus

作者：Li, Zheng[1,2]; Han, Lu[1]; Ji, Yizhi[1,3]; Wang, Xiaonan[1]; Tan, Tianwei[1]

第一作者：Li, Zheng

通讯作者：Tan, T.

机构：[1] Beijing Key Lab of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, China; [2] School of Textiles, Tianjin Polytechnic University, Tianjin, 300160, China; [3] Biochemical Engineering College, Beijing Union University, Beijing, 100023, China

第一机构：Beijing Key Lab of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, China

通讯机构：[1]Beijing Key Lab of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, China

年份：2010

卷号：49

期号：1

起止页码：138-142

外文期刊名：Biochemical Engineering Journal

收录：EI(收录号：20100612690967);Scopus(收录号：2-s2.0-75749102107)

语种：英文

外文关键词：Lactic acid - Energy utilization - Productivity - Yeast - Fermentation

摘要：To reduce the nutrient cost of l-lactic acid production, wheat bran was chosen as a nutrient source. Various pretreatment processes were investigated, and 80 °C for 20 h by acid-hydrolysis was a suitable method considering the energy consumption. Pretreated wheat bran showed a better performance than that without treatment, especially for l-lactic acid yield (0.99 g/g). Moreover, when 25 g/l wheat bran hydrolysate was combined with 30 g/l corn steep liquor, the l-lactic acid fermentation efficiency (yield 0.99 g/g, productivity 3.75 g/l/h) was even higher than that of the control with 15 g/l yeast extract (yield 0.95 g/g, productivity 2.46 g/l/h). Although much more wheat bran hydrolysate and corn steep liquor were used than yeast extract in total amount, the cost of nitrogen in fermentation was estimated to be ￥1286/t l-lactic acid (25 g/l wheat bran hydrolysate and 30 g/l corn steep liquor), which is only 11% of the ￥11471/t l-lactic acid (15 g/l yeast extract) in control test. Therefore, nutrients of wheat bran hydrolysate and corn steep liquor could be employed to substitute yeast extract for l-lactic acid production. ? 2009 Elsevier B.V. All rights reserved.