title: Continuous recovery of valine in a model mixture of amino acids and salt from Corynebacterium bacteria fermentation using a simulated moving bed chromatography.
abstract: The economical efficiency of valine production in related industries is largely affected by the performance of a valine separation process, in which valine is to be separated from leucine, alanine, and ammonium sulfate. Such separation is currently handled by a batch-mode hybrid process based on ion-exchange and crystallization schemes. To make a substantial improvement in the economical efficiency of an industrial valine production, such a batch-mode process based on two different separation schemes needs to be converted into a continuous-mode separation process based on a single separation scheme. To address this issue, a simulated moving bed (SMB) technology was applied in this study to the development of a continuous-mode valine-separation chromatographic process with uniformity in adsorbent and liquid phases. It was first found that a Chromalite-PCG600C resin could be eligible for the adsorbent of such process, particularly in an industrial scale. The intrinsic parameters of each component on the Chromalite-PCG600C adsorbent were determined and then utilized in selecting a proper set of configurations for SMB units, columns, and ports, under which the SMB operating parameters were optimized with a genetic algorithm. Finally, the optimized SMB based on the selected configurations was tested experimentally, which confirmed its effectiveness in continuous separation of valine from leucine, alanine, ammonium sulfate with high purity, high yield, high throughput, and high valine product concentration. It is thus expected that the developed SMB process in this study will be able to serve as one of the trustworthy ways of improving the economical efficiency of an industrial valine production process.
authors.affiliation: Department of Chemical Engineering, Hanyang University, Haengdang-dong, Seongdong-gu, Seoul 133-791, Republic of Korea.
authors.forename: Chanhun
authors.initials: C
authors.lastname: Park
authors.affiliation: Department of Chemical Engineering, Hanyang University, Haengdang-dong, Seongdong-gu, Seoul 133-791, Republic of Korea.
authors.forename: Hee-Geun
authors.initials: HG
authors.lastname: Nam
authors.affiliation: Department of Chemical Engineering, Hanyang University, Haengdang-dong, Seongdong-gu, Seoul 133-791, Republic of Korea.
authors.forename: Se-Hee
authors.initials: SH
authors.lastname: Jo
authors.affiliation: School of Chemical Engineering, 480 Stadium Mall Drive, Purdue University, West Lafayette, IN 47907-2100, USA.
authors.forename: Nien-Hwa Linda
authors.initials: NH
authors.lastname: Wang
authors.affiliation: Department of Chemical Engineering, Hanyang University, Haengdang-dong, Seongdong-gu, Seoul 133-791, Republic of Korea. Electronic address: munsy@hanyang.ac.kr.
authors.forename: Sungyong
authors.initials: S
authors.lastname: Mun
mesh_terms: D000327:Adsorption; D000596:Amino Acids / Q000737:chemistry*; D002623:Chemistry Techniques, Analytical / Q000379:methods*; D002845:Chromatography; D003352:Corynebacterium / Q000378:metabolism*; D003460:Crystallization; D005285:Fermentation; D007218:Industrial Microbiology / Q000379:methods*; D008962:Models, Theoretical; D012965:Sodium Chloride / Q000737:chemistry; D014633:Valine / Q000302:isolation & purification*
chemical_list: D000596:Amino Acids; D012965:Sodium Chloride; D014633:Valine
keywords: Continuous separation; Process optimization; Simulated moving bed; Valine