Chemical and biochemical bleaching of oat hulls : The effect of hydrogen peroxide, laccase, xylanase and sonication on optical properties and chemical composition
(2021) In Biotechnology Reports 30.- Abstract
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... (More)
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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- author
- Schmitz, Eva LU ; Francis, Juanita ; Gutke, Katarina ; Nordberg Karlsson, Eva LU ; Adlercreutz, Patrick LU and Paulsson, Magnus
- organization
- publishing date
- 2021-06
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Biobleaching, Chemical bleaching, Dietary fibre, Enzymes, Hydrogen peroxide, Oat hulls
- in
- Biotechnology Reports
- volume
- 30
- article number
- e00624
- publisher
- Elsevier
- external identifiers
-
- pmid:34123735
- scopus:85107827151
- ISSN
- 2215-017X
- DOI
- 10.1016/j.btre.2021.e00624
- language
- English
- LU publication?
- yes
- id
- 7d1a90a0-06ce-4ca6-9dd3-c9e0a7469541
- date added to LUP
- 2021-06-28 14:24:21
- date last changed
- 2024-06-15 13:03:13
@article{7d1a90a0-06ce-4ca6-9dd3-c9e0a7469541, abstract = {{<p>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.</p>}}, author = {{Schmitz, Eva and Francis, Juanita and Gutke, Katarina and Nordberg Karlsson, Eva and Adlercreutz, Patrick and Paulsson, Magnus}}, issn = {{2215-017X}}, keywords = {{Biobleaching; Chemical bleaching; Dietary fibre; Enzymes; Hydrogen peroxide; Oat hulls}}, language = {{eng}}, publisher = {{Elsevier}}, series = {{Biotechnology Reports}}, title = {{Chemical and biochemical bleaching of oat hulls : The effect of hydrogen peroxide, laccase, xylanase and sonication on optical properties and chemical composition}}, url = {{http://dx.doi.org/10.1016/j.btre.2021.e00624}}, doi = {{10.1016/j.btre.2021.e00624}}, volume = {{30}}, year = {{2021}}, }