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, TW[1]

机构：[1]Beijing Univ Chem Technol, Coll Life Sci & Technol, Beijing Key Lab Bioproc, Beijing 100029, Peoples R China;[2]Tianjin Polytech Univ, Sch Text, Tianjin 300160, Peoples R China;[3]Beijing Union Univ, Biochem Engn Coll, Beijing 100023, Peoples R China

第一机构：Beijing Univ Chem Technol, Coll Life Sci & Technol, Beijing Key Lab Bioproc, Beijing 100029, Peoples R China

通讯机构：[1]corresponding author), Beijing Univ Chem Technol, Coll Life Sci & Technol, Beijing Key Lab Bioproc, Beijing 100029, Peoples R 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：;WOS:【SCI-EXPANDED(收录号:WOS:000275581400020)】；

基金：The authors would like to express their thanks to financial supports from 863 High-Tech Program (Nos. 2006AA020101, 2006AA020102, 2006AA020103, and 2007AA10Z360), 973 High-Tech Program (2007CB707804 and 2007CB714304), National Natural Science Foundation of China (No. 20576013), National Science Fund for Distinguished Young Scholars of China (No. 20325622), Natural Science Foundation of Beijing, China (No. 2071002), and Beijing Municipal Science and Technology Project (No. D0205004040211).

语种：英文

外文关键词：L-Lactic acid; Wheat bran; Biomass; Platform chemicals; Shake-flask; Stirred tank

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 degrees 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 (sic)1286/t L-lactic acid (25 g/l wheat bran hydrolysate and 30 g/l corn steep liquor), which is only 11% of the (sic)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. (C) 2009 Elsevier B.V. All rights reserved.