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Chemical and biochemical bleaching of oat hulls: The effect of hydrogen peroxide, laccase, xylanase and sonication on optical properties and chemical composition

Oat hulls are an excellent dietary fibre source for food supplements due to their rich lignocellulose composition as well as their great abundance as low-value agricultural side stream. For the production of white fibre supplements, a mild, but effective bleaching of the hulls is required. Chemical...

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Autores principales: Schmitz, Eva, Francis, Juanita, Gutke, Katarina, Nordberg Karlsson, Eva, Adlercreutz, Patrick, Paulsson, Magnus
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8175284/
https://www.ncbi.nlm.nih.gov/pubmed/34123735
http://dx.doi.org/10.1016/j.btre.2021.e00624
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author Schmitz, Eva
Francis, Juanita
Gutke, Katarina
Nordberg Karlsson, Eva
Adlercreutz, Patrick
Paulsson, Magnus
author_facet Schmitz, Eva
Francis, Juanita
Gutke, Katarina
Nordberg Karlsson, Eva
Adlercreutz, Patrick
Paulsson, Magnus
author_sort Schmitz, Eva
collection PubMed
description Oat hulls are an excellent dietary fibre source for food supplements due to their rich lignocellulose composition as well as their great abundance as low-value agricultural side stream. For the production of white fibre supplements, a mild, but effective bleaching of the hulls is required. Chemical bleaching with hydrogen peroxide and sodium hydroxide was here found to be a suitable method increasing the CIE L* value (corresponds to a lightness value) above 85. The developed method is mild, retaining the hull’s chemical composition. Only a minor decrease in coniferaldehyde structures upon bleaching was detected. Colour and chemical variabilities of oat hulls from different growth seasons did not influence the required bleaching conditions to achieve the desired optical properties. The inclusion of biochemical bleaching steps utilizing the xylanase Pentopan Mono BG, the laccase NS51003 and sonication was industrially not feasible as they could not reduce the required amount of subsequently applied bleaching chemicals significantly.
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spelling pubmed-81752842021-06-11 Chemical and biochemical bleaching of oat hulls: The effect of hydrogen peroxide, laccase, xylanase and sonication on optical properties and chemical composition Schmitz, Eva Francis, Juanita Gutke, Katarina Nordberg Karlsson, Eva Adlercreutz, Patrick Paulsson, Magnus Biotechnol Rep (Amst) Research Article Oat hulls are an excellent dietary fibre source for food supplements due to their rich lignocellulose composition as well as their great abundance as low-value agricultural side stream. For the production of white fibre supplements, a mild, but effective bleaching of the hulls is required. Chemical bleaching with hydrogen peroxide and sodium hydroxide was here found to be a suitable method increasing the CIE L* value (corresponds to a lightness value) above 85. The developed method is mild, retaining the hull’s chemical composition. Only a minor decrease in coniferaldehyde structures upon bleaching was detected. Colour and chemical variabilities of oat hulls from different growth seasons did not influence the required bleaching conditions to achieve the desired optical properties. The inclusion of biochemical bleaching steps utilizing the xylanase Pentopan Mono BG, the laccase NS51003 and sonication was industrially not feasible as they could not reduce the required amount of subsequently applied bleaching chemicals significantly. Elsevier 2021-04-29 /pmc/articles/PMC8175284/ /pubmed/34123735 http://dx.doi.org/10.1016/j.btre.2021.e00624 Text en © 2021 The Author(s) https://creativecommons.org/licenses/by/4.0/This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Research Article
Schmitz, Eva
Francis, Juanita
Gutke, Katarina
Nordberg Karlsson, Eva
Adlercreutz, Patrick
Paulsson, Magnus
Chemical and biochemical bleaching of oat hulls: The effect of hydrogen peroxide, laccase, xylanase and sonication on optical properties and chemical composition
title Chemical and biochemical bleaching of oat hulls: The effect of hydrogen peroxide, laccase, xylanase and sonication on optical properties and chemical composition
title_full Chemical and biochemical bleaching of oat hulls: The effect of hydrogen peroxide, laccase, xylanase and sonication on optical properties and chemical composition
title_fullStr Chemical and biochemical bleaching of oat hulls: The effect of hydrogen peroxide, laccase, xylanase and sonication on optical properties and chemical composition
title_full_unstemmed Chemical and biochemical bleaching of oat hulls: The effect of hydrogen peroxide, laccase, xylanase and sonication on optical properties and chemical composition
title_short Chemical and biochemical bleaching of oat hulls: The effect of hydrogen peroxide, laccase, xylanase and sonication on optical properties and chemical composition
title_sort chemical and biochemical bleaching of oat hulls: the effect of hydrogen peroxide, laccase, xylanase and sonication on optical properties and chemical composition
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8175284/
https://www.ncbi.nlm.nih.gov/pubmed/34123735
http://dx.doi.org/10.1016/j.btre.2021.e00624
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