Title:
Residuals from Edible Mushroom Production - New Enzyme Sources for an Enhanced Biogas Process Efficiency
Author(s):
Schimpf, U., Nielsen, K., Ho Thu, P., Dominikovic, I., Blachowski, N., Slomski, P., Schulz, R.
Document(s):
Paper
Abstract:
Lignocellulose is a large energy source in plants and can be made partly accessible in biogas processes using enzyme preparations. To create a low-cost and high effective enzyme preparation with an extensive enzyme spectrum new enzyme sources are under investigation. This work aims to optimize the biogas and in particular the methane production of difficultly fermentable substrates using residues from edible mushroom production. The utili-zation of residues of food or agricultural industries plays a central role in substrate and energy saving. For this pur-pose, a mixture of wheat straw and hay was pretreated with different enzyme rich residues of Lentinula edodes (shiitake) production in varying concentrations. Beside the composition of biogas substrates, enzyme rich residues of shiitake mushroom production and fermentation residues the hydrolytic potential of the biocatalytically active resi-dues was measured. The residues of shiitake mushroom production were able to release reducing carbohydrates for biogas production. In mesophilic batch digestion experiments the methane production could be significantly in-creased by 12 % (p<0.05). Using a mechanical pretreatment before enzymatically treatment a significant increase of 24 % (p<0.01) was attainable. An increase of 19 %, statistically not significant, could be realized at thermophilic batch digestion experiments. In this case a preliminary mechanical pretreatment is required. The difference between untreated and enzymatically treated biogas substrates was enhanced with increased enzyme concentration. Further-more the conversion of lignocellulose was calculated. A correlation was found between the degradation rate of cellulose or hemicellulose and the methane production.
Keywords:
biological conversion, enzymatic hydrolysis, lignocellulose, residues
Topic:
Biomass Conversion Technologies for Heating, Electricity and Chemicals
Subtopic:
Enzymatic processes
Event:
19th European Biomass Conference and Exhibition
Session:
OA6.5
Pages:
934 - 943
ISBN-13:
978-88-89407-55-4
ISBN-10:
88-89407-55-7
Paper DOI:
10.5071/19thEUBCE2011-OA6.5
Price:
FREE
