title: Open fermentative production of L-lactic acid using white rice bran by simultaneous saccharification and fermentation.
abstract: To reduce raw material cost for lactic acid production, white rice bran as an important byproduct in rice milling, was used in l-lactic acid production by open simultaneous saccharification and fermentation (SSF). Although one thermotolerant strain was used at a temperature as high as 50°C, the open fermentation was still inefficient due to the indigenous thermophilic bacteria from corn steep liquor powder. A stepwise controlled pH was proposed in open SSF process, and no complicated pretreatment or sterilization was needed before fermentation. In batch fermentation, 117 gL(-1) lactic acid was obtained, and the productivity and yield reached 2.79 gL(-1) h(-1) and 98.75%, respectively. These results showed an efficient way to develop high value-added products from white rice bran.
authors.affiliation: National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, PR China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Wang
authors.affiliation: National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, PR China.
authors.forename: Di
authors.initials: D
authors.lastname: Cai
authors.affiliation: National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, PR China.
authors.forename: Meiling
authors.initials: M
authors.lastname: He
authors.affiliation: National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, PR China.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Wang
authors.affiliation: National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, PR China.
authors.forename: Peiyong
authors.initials: P
authors.lastname: Qin
authors.affiliation: National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing 100029, PR China. Electronic address: twtan@mail.buct.edu.cn.
authors.forename: Tianwei
authors.initials: T
authors.lastname: Tan
mesh_terms: D001407:Bacillus / Q000378:metabolism; D001709:Biotechnology / Q000379:methods*; D005285:Fermentation; D007220:Industrial Waste; D019344:Lactic Acid / Q000096:biosynthesis*; D012275:Oryza / Q000737:chemistry / Q000378:metabolism*; D013696:Temperature; D003313:Zea mays / Q000737:chemistry / Q000382:microbiology
chemical_list: D007220:Industrial Waste; D019344:Lactic Acid
keywords: Bacillus coagulans; Corn steep liquor powder; Simultaneous saccharification and fermentation; White rice bran; l-Lactic acid