Microbial pretreatment of camelina straw and switchgrass by Trametes versicolor and Phanerochaete chrysosporium to improve physical quality and enhance enzymatic digestibility of solid biofuel pellets

Cuong N. Dao, Lope G. Tabil, Edmund Mupondwa and Tim Dumonceaux

Renewable Energy, 2023, vol. 217, issue C

Abstract: In this study, optimization of solid-state fermentation of Camelina sativa residues (camelina straw, CS) and Panicum virgatum (switchgrass, SG) by Trametes versicolor 52J (TV52J), Trametes versicolor m4D (TVm4D), and Phanerochaete chrysosporium (PC) was conducted. At optimal conditions, the tensile strength, unit density and mass loss for CS pellets were 6.2 MPa, 1139 kg m−3, and 33%, respectively after 31 d pretreatment by TVm4D, while for SG pellets, they were 1.6 MPa, 1244 kg m−3 , and 13.8%, respectively after 32 d pretreatment by TVm4D. Although the holocellulose content of microbially pretreated CS and SG pellets dropped from 58.6 to 36.7%, and from 66.2 to 46.3%, respectively, the glucose yield of CS pellets increased from 12.9 to 61.1% with a corresponding xylose yield increase from 14.7 to 60.1%. The glucose and xylose yield of SG increased from 10.9 to 59.9% and 13.4 to 35.7%, respectively. It can be concluded that microbial pretreatment contributed to mass loss of the samples but trivially affected the energy content and significantly boosted the physical properties and enzymatic digestibility of the treated pellets. The microbially pretreated CS is recommended for densification and combustion while the microbially pretreated SG is more suitable for biochemical conversion.

Keywords: Microbial pretreatment; Pellets; Biofuel; Agricultural residues; Camelina; Switchgrass (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0960148123010613
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:217:y:2023:i:c:s0960148123010613

DOI: 10.1016/j.renene.2023.119147

Access Statistics for this article

Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides

More articles in Renewable Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().