title: Two-stage electrodialytic concentration of glyceric acid from fermentation broth.
abstract: The aim of this research was the application of a two-stage electrodialysis (ED) method for glyceric acid (GA) recovery from fermentation broth. First, by desalting ED, glycerate solutions (counterpart is Na+) were concentrated using ion-exchange membranes, and the glycerate recovery and energy consumption became more efficient with increasing the initial glycerate concentration (30 to 130 g/l). Second, by water-splitting ED, the concentrated glycerate was electroconverted to GA using bipolar membranes. Using a culture broth of Acetobacter tropicalis containing 68.6 g/l of D-glycerate, a final D-GA concentration of 116 g/l was obtained following the two-stage ED process. The total energy consumption for the D-glycerate concentration and its electroconversion to D-GA was approximately 0.92 kWh per 1 kg of D-GA.
authors.affiliation: Research Institute for Innovation in Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5-2, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan. hiroshi.habe@aist.go.jp
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Habe
authors.forename: Yuko
authors.initials: Y
authors.lastname: Shimada
authors.forename: Tokuma
authors.initials: T
authors.lastname: Fukuoka
authors.forename: Dai
authors.initials: D
authors.lastname: Kitamoto
authors.forename: Masayuki
authors.initials: M
authors.lastname: Itagaki
authors.forename: Kunihiko
authors.initials: K
authors.lastname: Watanabe
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Yanagishita
authors.forename: Keiji
authors.initials: K
authors.lastname: Sakaki
mesh_terms: D000091:Acetobacter / Q000378:metabolism; D003956:Dialysis / Q000379:methods*; D055664:Electrochemical Techniques; D005285:Fermentation; D005988:Glyceric Acids / Q000737:chemistry / Q000302:isolation & purification* / Q000378:metabolism; D014867:Water / Q000737:chemistry
chemical_list: D005988:Glyceric Acids; D014867:Water; C042971:glyceric acid