Efficient conversion of pretreated brewer’s spent grain and wheat bran by submerged cultivation of Hericium erinaceus

•Brewer’s spent grain and wheat bran were converted into medicinal edible fungi.•Biological efficiencies of 39 and 35% were obtained by the bioconversion.•The pretreatment effort was reduced to a required input of 0.25/0.16wt% H2SO4.•Value was added to the product of the bioconversion by a second fe...

Full description

Saved in:
Bibliographic Details
Published in:Bioresource technology 2016-12, Vol.222, p.123-129
Main Authors: Wolters, Niklas, Schabronath, Christoph, Schembecker, Gerhard, Merz, Juliane
Format: Article
Language:English
Subjects:
Animals
Basidiomycota - chemistry
Basidiomycota - physiology
Bioconversion
Biomass
Biotechnology - methods
Byproduct utilization
Dietary Fiber - metabolism
Diterpenes - metabolism
Edible Grain - chemistry
Edible Grain - metabolism
Erinacine C
Fermentation
Functional food
Medicinal fungus
Waste Products
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•Brewer’s spent grain and wheat bran were converted into medicinal edible fungi.•Biological efficiencies of 39 and 35% were obtained by the bioconversion.•The pretreatment effort was reduced to a required input of 0.25/0.16wt% H2SO4.•Value was added to the product of the bioconversion by a second fermentation step.•Erinacine C contents of 175mg/g were achieved for byproduct based fungal biomass. Brewer’s spent grain (BSG) and wheat bran (WB) are industrial byproducts that accumulate in millions of tons per year and are typically applied as animal feed. Since both byproducts show a great potential as substrates for fermentation, the approach developed in this study consists of utilizing these lignocellulosic byproducts for biomass production of the medicinal fungus Hericium erinaceus through submerged cultivation. To increase the biological efficiency of the bioconversion, acidic pretreatment was applied yielding a bioconversion of 38.6% for pretreated BSG and 34.8% for pretreated WB. This study shows that the complete degradation of (hemi)cellulose into monosaccharides was not required for an efficient bioconversion. The produced fungal biomass was applied in a second fermentation step to induce the secondary metabolite erinacine C production. Thus, biomass was produced as a functional food ingredient with erinacine C contents of 174.8mg/g for BSG and 99.3mg/g for WB based bioconversions.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2016.09.121