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

Author

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

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.

Suggested Citation

  • Chen, Feng & Grimm, Alejandro & Eilertsen, Lill & Martín, Carlos & Arshadi, Mehrdad & Xiong, Shaojun, 2021. "Integrated production of edible mushroom (Auricularia auricular-judae), fermentable sugar and solid biofuel," Renewable Energy, Elsevier, vol. 170(C), pages 172-180.
    • Handle: RePEc:eee:renene:v:170:y:2021:i:c:p:172-180
    DOI: 10.1016/j.renene.2021.01.124
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    Cited by:

    1. Tizvir, A. & Shojaeefard, M.H. & Zahedi, A. & Molaeimanesh, G.R., 2022. "Performance and emission characteristics of biodiesel fuel from Dunaliella tertiolecta microalgae," Renewable Energy, Elsevier, vol. 182(C), pages 552-561.

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