Efficient production of L-lactic acid from corncob molasses, a waste by-product in xylitol production, by a newly isolated xylose utilizing Bacillus sp. strain.
Lignocellulosic biomass-derived sugars are considered nowadays to be an economically attractive carbohydrate feedstock for large-scale fermentations of bulk chemicals such as lactic acid. In the present study, corncob molasses containing a high content of xylose, which is one of the lignocellulosic biomasses and a waste by-product from xylitol production, was used for L-lactic acid production via a newly isolated xylose utilizing Bacillus sp. strain XZL9. Bacillus sp. strain XZL9 can utilize the mixture of sugars including xylose, arabinose, and glucose in corncob molasses for L-lactic acid production. High concentration of L-lactic acid (74.7 g l⁻¹) was obtained from corncob molasses (initial total sugars of 91.4 g l⁻¹) in fed-batch fermentation. This study provides an encouraging means of producing L-lactic acid from lignocellulosic resource such as the low-cost corncob molasses.
Wang
Limin
L
Institute of Microbiology, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
Zhao
Bo
B
Liu
Bo
B
Yu
Bo
B
Ma
Cuiqing
C
Su
Fei
F
Hua
Dongliang
D
Li
Qinggang
Q
Ma
Yanhe
Y
Xu
Ping
P
D001407:Bacillus / Q000378:metabolism*; D005285:Fermentation; D005947:Glucose / Q000378:metabolism; D019344:Lactic Acid / Q000378:metabolism*; D008965:Molasses; D014993:Xylitol / Q000378:metabolism*; D014994:Xylose / Q000378:metabolism*; D003313:Zea mays / Q000378:metabolism*
D019344:Lactic Acid; D014994:Xylose; D005947:Glucose; D014993:Xylitol