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. 2017 Apr 8;10:86. doi: 10.1186/s13068-017-0777-1

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© The Author(s) 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 3 — Selection of H₂O₂ concentration (v/v on the solution) for the AHP pretreatment. The pretreatment was carried out for 12 h at a fixed condition (pH 11.5, 25 °C, 12.5% solid content, 150 rpm shaking speed). The percentages of yield and component content refer to the weights of AAO-pretreated substrates and AHP-pretreated substrates, respectively