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Spent grains – a new support for brewing yeast immobilisation

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Abstract

A novel carrier obtained from spent grains, a brewing by-product, was used for brewing yeast immobilisation in a continuous bubble-column reactor. The multiple-layer cell adhesion to the carrier particles resulted in a maximum cell load of 430 mg dry cell g−1 dry carrier (d.c.). After 120 h of reactor operation, the cell load of DEAE-modified carrier was below 40 mg dry cell g−1 d.c. while the values for non-modified carrier reached at least 100 mg dry cell g−1 d.c. The changes in substrate composition on the rate of yeast attachment and on its stability were also studied.

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Authors and Affiliations

  1. Centro de Engenharia Biológica – IBQF, Universidade do Minho, Campus de Gualtar, 4710-057, Braga, Portugal

    T. Brányik, A.A. Vicente & J.A. Teixeira

  2. UNICER – União Cervejeira S.A., Leça do Balio, 4466-955, S. Mamede de Infesta, Portugal

    J.M. Machado Cruz

Authors
  1. T. Brányik
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  2. A.A. Vicente
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  3. J.M. Machado Cruz
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  4. J.A. Teixeira
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Correspondence to J.A. Teixeira.

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Brányik, T., Vicente, A., Machado Cruz, J. et al. Spent grains – a new support for brewing yeast immobilisation. Biotechnology Letters 23, 1073–1078 (2001). https://doi.org/10.1023/A:1010558407475

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  • DOI: https://doi.org/10.1023/A:1010558407475

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