Integrated production of edible mushroom (Auricularia auricular-judae), fermentable sugar and solid biofuel

Feng Chen, Alejandro Grimm, Lill Eilertsen, Carlos Martín, Mehrdad Arshadi and Shaojun Xiong

Renewable Energy, 2021, vol. 170, issue C, 172-180

Abstract: This study aimed to develop an energy- and resource-efficient process for the coproduction of edible mushroom, fermentable sugar and solid biofuel from wood residues. A promising potential was revealed for wood ear fungus (Auricularia auricular-judae), which yielded about 200 g mushroom per kg dry birch-based substrate, with concomitant degradation of 76.8 and 85.7% of lignin and xylan, respectively, in the substrate. Substrate pasteurisation by hot-air (85–100 °C) was as effective as by energy intensive autoclaving (121 °C), resulting comparable mushroom growth and degradation of lignocellulose. The spent mushroom substrate (SMS) contained 28–33% glucan, which upon analytical enzymatic saccharification released around 46% of the potentially-achievable glucose, corresponding to a 2.3–fold enzymatic digestibility compared with that of the raw substrate. The solid leftover generated after enzymatic hydrolysis revealed high thermal energy value and promising combustion characteristics, showing a plausibility to be recycled as solid fuel for self-supporting energy system and space heating.

Keywords: Edible mushroom; Energy saving; Biological pretreatment; Bioethanol; Solid biofuel (search for similar items in EconPapers)
Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:170:y:2021:i:c:p:172-180

DOI: 10.1016/j.renene.2021.01.124

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