Energy-efficient substrate pasteurisation for combined production of shiitake mushroom (Lentinula edodes) and bioethanol

Abstract

Hot-air (75-100 degrees C) pasteurisation (HAP) of birch-wood-based substrate was compared to conventional autoclaving (steam at 121 degrees C) with regard to shiitake growth and yield, chemical composition of heat-pretreated material and spent mushroom substrate (SMS), enzymatic digestibility of glucan in SMS, and theoretical bioethanol yield. Compared to autoclaving, HAP resulted in faster mycelial growth, earlier fructification, and higher or comparable fruit-body yield. The heat pretreatment methods did not differ regarding the fractions of carbohydrate and lignin in pretreated material and SMS, but HAP typically resulted in lower fractions of extractives. Shiitake cultivation, which reduced the mass fraction of lignin to less than half of the initial without having any major impact on the mass fraction of glucan, enhanced enzymatic hydrolysis of glucan about four-fold. The choice of heating method did not affect enzymatic digestibility. Thus, HAP could substitute autoclaving and facilitate combined shiitake mushroom and bioethanol production.

Keywords

Hot-air pasteurisation; Edible fungi; Spent mushroom substrate; Lignin degradation; Enzymatic digestibility

Published in

Bioresource Technology
2019, Volume: 274, pages: 65-72
Publisher: ELSEVIER SCI LTD

SLU Authors

• Xiong, Shaojun

  • 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
    

• Wei, Maogui

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

• Myronycheva, Olena

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

• Larsson, Sylvia

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

• Lestander, Torbjörn

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

Sustainable Development Goals

SDG2 Zero hunger
SDG7 Affordable and clean energy


UKÄ Subject classification

Bioenergy
Agricultural Science


Publication identifier

DOI: https://doi.org/10.1016/j.biortech.2018.11.071

Permanent link to this page (URI)

https://res.slu.se/id/publ/97825