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

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 degrees C) was as effective as by energy intensive autoclaving (121 degrees 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. (C) 2021 Elsevier Ltd. All rights reserved.

Keywords

Edible mushroom; Energy saving; Biological pretreatment; Bioethanol; Solid biofuel

Published in

Renewable Energy
2021, volume: 170, pages: 172-180

SLU Authors

• Xiong, Shaojun

  • Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences
    
  • Beijing Normal University

• Chen, Feng

  • Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences
    

• Grimm, Alejandro

  • Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences
    

• Eilertsen, Lill

  • Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences
    
  • Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences
    

• Arshadi, Mehrdad

  • Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences
    

Global goals (SDG)

SDG7 Affordable and clean energy
SDG9 Industry, innovation and infrastructure
SDG12 Responsible consumption and production

UKÄ Subject classification

Renewable Bioenergy Research

Publication identifier

• DOI: https://doi.org/10.1016/j.renene.2021.01.124

Permanent link to this page (URI)

https://res.slu.se/id/publ/110623