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Prehydrolysis of xylan in culm of Sasa kurilensis with dilute sulphuric acid

Vorhydrolyse von Xylan im Halm von Sasa kurilensis mit verdünnter Schwefelsäure

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Abstract

To prepare a substrate for microbial conversion of xylose into xylitol, the culm of Sasa kurilensis was hydrolysed with dilute sulphuric acid. A fermentable substrate with a relatively high xylose concentration (21.9 g L−1) was obtained by hydrolysis with 2% sulphuric acid with a liquid to solid ratio of 10 : 1 at 121°C for 1 h. During hydrolysis at elevated temperatures, some undesirable byproducts were also generated, such as degradation products of solubilized sugars and lignin, which are potential inhibitors of microbial metabolism. These compounds were successfully removed from the hydrolysate by treatment with a commercially available activated charcoal (30 g L−1 dose).

Zusammenfassung

Zur Herstellung eines Substrats für die mikrobielle Umwandlung von Xylose in Xylit wurde der Halm von Sasa kurilensis mit verdünnter Schwefelsäure hydrolysiert. Durch Hydrolyse mit 2% Schwefelsäure und einem Flüssigkeits-Feststoff-Verhältnis von 10 : 1 bei einer Temperatur von 121°C und für die Dauer von 1 Stunde wurde ein gärfähiges Substrat mit einer relativ hohen Xylosekonzentration (21,9 g L−1) hergestellt. Während der Hydrolyse bei hohen Temperaturen entstanden auch einige unerwünschte Nebenprodukte, wie zum Beispiel Abfallprodukte von löslichem Zucker und Lignin, die mögliche Hemmstoffe für den mikrobiellen Stoffwechsel sind. Diese Stoffe wurden aus dem Hydrolysat durch Behandlung mit handelsüblicher Aktivkohle (30 g L−1 Dosis) erfolgreich entfernt.

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Authors and Affiliations

  1. Department of Biotechnology and Environmental Chemistry, Kitami Institute of Technology, 165 Koen-cho, 090-8507, Kitami, Japan

    Masahiro Miura, Keitaro Yokono, Housei Miyamoto, Masakazu Aoyama, Kiyoshi Tada & Jun-ichi Horiuchi

  2. Institute of Wood Biomass, Faculty of Agriculture, Niigata University, 8050 Ikarashi 2-no-cho, Nishi-ku, 950-2181, Niigata, Japan

    Yasuo Kojima

  3. Hokkaido Mitsui Chemical Corporation, 1 Toyonuma-cho, 073-0138, Sunagawa, Japan

    Chikara Sakai & Masahiro Nakahara

Authors
  1. Masahiro Miura
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  2. Keitaro Yokono
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  3. Housei Miyamoto
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  4. Masakazu Aoyama
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  5. Kiyoshi Tada
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  6. Jun-ichi Horiuchi
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  7. Yasuo Kojima
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  8. Chikara Sakai
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  9. Masahiro Nakahara
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Correspondence to Masakazu Aoyama.

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Miura, M., Yokono, K., Miyamoto, H. et al. Prehydrolysis of xylan in culm of Sasa kurilensis with dilute sulphuric acid. Eur. J. Wood Prod. 68, 139–142 (2010). https://doi.org/10.1007/s00107-009-0397-y

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  • DOI: https://doi.org/10.1007/s00107-009-0397-y

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