title: Production of L- and D-lactic acid from waste Curcuma longa biomass through simultaneous saccharification and cofermentation.
abstract: Simultaneous saccharification and cofermentation (SSCF) of Curcuma longa waste biomass obtained after turmeric extraction to L- and D-lactic acid by Lactobacillus coryniformis and Lactobacillus paracasei, respectively, was investigated. This is a rich, starchy, agro-industrial waste with potential for use in industrial applications. After optimizing the fermentation of the biomass by adjusting nitrogen sources, enzyme compositions, nitrogen concentrations, and raw material concentrations, the SSCF process was conducted in a 7-l jar fermentor at 140 g dried material/L. The maximum lactic acid concentration, average productivity, reducing sugar conversion and lactic acid yield were 97.13 g/L, 2.7 g/L/h, 95.99% and 69.38 g/100 g dried material for L-lactic acid production, respectively and 91.61 g/L, 2.08 g/L/h, 90.53% and 65.43 g/100 g dried material for D-lactic acid production, respectively. The simple and efficient process described in this study could be utilized by C. longa residue-based lactic acid industries without requiring the alteration of plant equipment.
authors.affiliation: Department of Green Chemistry and Environmental Biotechnology, University of Science and Technology, 217 Gajungro, Yuseong-gu, Daejeon 305-333, Republic of Korea; Research Center for Biobased Chemistry, Division of Convergence Chemistry, Korea Research Institute of Chemical Technology, Daejeon 305-600, Republic of Korea.
authors.forename: Cuong Mai
authors.initials: CM
authors.lastname: Nguyen
authors.affiliation: Research Center for Biobased Chemistry, Division of Convergence Chemistry, Korea Research Institute of Chemical Technology, Daejeon 305-600, Republic of Korea.
authors.forename: Jin-Seog
authors.initials: JS
authors.lastname: Kim
authors.affiliation: Department of Phytochemistry, Vietnam Institute of Industrial Chemistry, No. 2 Pham Ngu Lao Street, Hanoi, Viet Nam.
authors.forename: Thanh Ngoc
authors.initials: TN
authors.lastname: Nguyen
authors.affiliation: Research Center for Biobased Chemistry, Division of Convergence Chemistry, Korea Research Institute of Chemical Technology, Daejeon 305-600, Republic of Korea.
authors.forename: Seul Ki
authors.initials: SK
authors.lastname: Kim
authors.affiliation: Research Center for Biobased Chemistry, Division of Convergence Chemistry, Korea Research Institute of Chemical Technology, Daejeon 305-600, Republic of Korea.
authors.forename: Gyung Ja
authors.initials: GJ
authors.lastname: Choi
authors.affiliation: Research Center for Biobased Chemistry, Division of Convergence Chemistry, Korea Research Institute of Chemical Technology, Daejeon 305-600, Republic of Korea.
authors.forename: Yong Ho
authors.initials: YH
authors.lastname: Choi
authors.affiliation: Research Center for Biobased Chemistry, Division of Convergence Chemistry, Korea Research Institute of Chemical Technology, Daejeon 305-600, Republic of Korea.
authors.forename: Kyoung Soo
authors.initials: KS
authors.lastname: Jang
authors.affiliation: Department of Green Chemistry and Environmental Biotechnology, University of Science and Technology, 217 Gajungro, Yuseong-gu, Daejeon 305-333, Republic of Korea; Research Center for Biobased Chemistry, Division of Convergence Chemistry, Korea Research Institute of Chemical Technology, Daejeon 305-600, Republic of Korea. Electronic address: kjinc@krict.re.kr.
authors.forename: Jin-Cheol
authors.initials: JC
authors.lastname: Kim
mesh_terms: D018533:Biomass; D002241:Carbohydrates / Q000737:chemistry*; D030024:Curcuma / Q000378:metabolism*; D004305:Dose-Response Relationship, Drug; D005285:Fermentation; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D019344:Lactic Acid / Q000096:biosynthesis* / Q000737:chemistry; D007778:Lactobacillus / Q000378:metabolism; D009584:Nitrogen / Q000737:chemistry; D012997:Solvents; D013025:Glycine max; D013997:Time Factors
chemical_list: D002241:Carbohydrates; D007220:Industrial Waste; D012997:Solvents; D019344:Lactic Acid; D009584:Nitrogen
keywords: Curcuma longa; Lactic acid; Lactobacillus coryniformis; Lactobacillus paracasei; Simultaneous saccharification and cofermentation