Abstract

Formulation of substrates based on three hardwood species combined with modulation of nitrogen content by whey addition (0-2%) was investigated in an experiment designed in D-optimal model for their effects on biological preproceesing of lignocellulosic feedstock by shiitake mushroom (Lentinula edodes) cultivation. Nitrogen loading was shown a more significant role than wood species for both mushroom production and lignocellulose degradation. The fastest mycelial colonisation occurred with no nitrogen supplementation, but the highest mushroom yields were achieved when 1% whey was added. Low nitrogen content resulted in increased delignification and minimal glucan consumption. Delignification was correlated with degradation of syringyl lignin unit, as indicated by a significant reduction (41.5%) of the syringyl-to-guaiacyl ratio after cultivation. No significant changes in substrate crystallinity were observed. The formation of furan aldehydes and aliphatic acids was negligible during the pasteurisation and fungal cultivation, while the content of soluble phenolics increased up to seven-fold.

Keywords

Fungal pretreatment; Hardwood substrate; Lignocellulose degradation; Phenolic components; PLS model

Published in

Bioresource Technology
2022, Volume: 344, article number: 126256
Publisher: ELSEVIER SCI LTD

SLU Authors

• Chen, Feng

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

• Lestander, Torbjörn

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

• Grimm, Alejandro

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

• Xiong, Shaojun

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

UKÄ Subject classification

Bioenergy


Publication identifier

DOI: https://doi.org/10.1016/j.biortech.2021.126256

Permanent link to this page (URI)

https://res.slu.se/id/publ/114516