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2004 Fiscal Year Final Research Report Summary

Separation of Hydrolysate Amino Acids by Electrodialysis with a Bioplar Membrane and Ion-exchange Membranes

Research Project

Project/Area Number 14550746
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 反応・分離工学
Research InstitutionAkita University

Principal Investigator

TAKAHASHI Hiroshi  Akita University, Fac.Eng.and Resource Sci., Lecturer, 工学資源学部, 講師 (70197169)

Project Period (FY) 2002 – 2004
Keywordsbipolar membrane / electrodialysis / ion-exchange membrane / pH step / amino acid
Research Abstract

We have developed a new technique of electrodialysis with a bipolar membrane and ion-exchange membranes. The technique has a separating zone with pH steps between compartments, and may be possible to separate ampholytes by difference of the isoelectric points. The electrodialyzer composed of six compartments, which were divided by a cation-exchange membrane, a bipolar membrane, and anion-exchange membranes, respectively. When a voltage was applied to the electrodialyzer, hydroxide ions were electrically generated by the anion-exchange layer in the bipolar membrane, and moved to anode side compartments through anion-exchange membranes. The hydroxide concentration in each compartment was almost equall to the concentration of coexisting cations, and formed alkaline-pH steps in the electrodialyzer. Moreover, we attempted to apply the bipolar membrane technique to separation of acidic and neutral amino acids. In the range of pH steps of 8 to 13, acidic amino acid permeated through the anion-exchange membranes, and accumulated in the anode compartment, although neutral amino acids remained in the feed compartment. Thus, the separation by the new technique proceeded well. All the experimental data were simulated by a mathematical model, which considers dissociation of amino acids, electro-neutrality in the solution, ion-exchange equilibrium, hydroxide production rate with a bipolar membrane, and flux in the anion-exchange membranes. The model well explained the experimental results of the formation of pH steps in the electrodialyzer, and of the amino acids separation.

  • Research Products

    (4 results)

All 2004 2003 2002

All Journal Article (4 results)

  • [Journal Article] Formation of Alkaline pH Steps in an Electrodialyzer with a Bipolar and Ion-exchange Membranes, and Its Application to Amino Acids Separation2004

    • Author(s)
      Hiroshi Takahashi, K.Makita, K-I.Kikuchi
    • Journal Title

      Proc.of 10^<th> The Asian Pacific Confederation of Chemical Engineers 1P-12-014

      Pages: 1-8

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Formation of Alkaline pH steps in an electrodialysis with a Bipolar and Ion-exchange Membranes, and Its Application to Amino Acids Separation2004

    • Author(s)
      Hiroshi Takahashi, K.Makita, K-I.Kikuchi
    • Journal Title

      Proc.of 10^<th> The Asian Pacific Confederation of Chemical Engineers 1P-12-014

      Pages: 1-8

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] バイポーラ膜併用型電気透析における中性アミノ酸の相互分離2003

    • Author(s)
      高橋博, 牧田健吾, 菊地賢一
    • Journal Title

      化学工学会第36回秋季大会講演要旨集 V2A08

      Pages: 1

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] バイポーラ膜併用型電気透析におけるアルカリpH勾配の形成とアミノ酸の膜透過特性2002

    • Author(s)
      牧田健吾, 高橋博, 菊地賢一
    • Journal Title

      化学工学会第67年会講演要旨集 I105

      Pages: 1

    • Description
      「研究成果報告書概要(和文)」より

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Published: 2006-07-11  

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