Effect of pelleting on the enzymatic digestibility of corn stover

Chen, Xueli; Freitas dos Santos, Antonio C.; Ramirez Gutierrez, Diana M.; Song, Peiyuan; Aston, John E.; Thompson, David N.; Dooley, James H.; Ladisch, Michael R.; Mosier, Nathan S.

doi:10.1016/j.biortech.2023.129338

Effect of pelleting on the enzymatic digestibility of corn stover

Journal Article · Mon Jun 19 00:00:00 EDT 2023 · Bioresource Technology

DOI:https://doi.org/10.1016/j.biortech.2023.129338· OSTI ID:2228744

^[1]; Freitas dos Santos, Antonio C. ^[1]; Ramirez Gutierrez, Diana M. ^[1]; Song, Peiyuan ^[1]; Aston, John E. ^[2]; ^[2]; ^[3]; ^[1]; Mosier, Nathan S. ^[1]

Purdue Univ., West Lafayette, IN (United States)
Idaho National Laboratory (INL), Idaho Falls, ID (United States)
Forest Concepts, LLC, Auburn, WA (United States)

Pelleting of lignocellulosic biomass to improve its transportation, storage and handling impacts subsequent processing and conversion. Here, this work reports the role of high moisture pelleting in the enzymatic digestibility of corn stover prior to pretreatment, together with associated substrate characteristics. Pelleting increases the digestibility of unpretreated corn stover, from 8.2 to 15.5% glucan conversion, at 5% solid loading using 1 FPU Cellic® CTec2 per g solids. Compositional analysis indicates that loose and pelleted corn stover have similar non-dissolvable compositions, although their extractives are different. Enzymatic hydrolysis of corn stover after size reduction to normalize particle sizes and removal of extractives confirms that pelleting improves corn stover digestibility. Such differences may be explained by the decreased particle size, improved substrate accessibility, and hydrolysis of cross-linking structures induced by pelleting. These findings are useful for the development of processing schemes for sustainable and efficient use of lignocellulose.

View Accepted Manuscript (DOE)

Research Organization:: Idaho National Laboratory (INL), Idaho Falls, ID (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Bioenergy Technologies Office (BETO)

Grant/Contract Number:: AC07-05ID14517; EE0008910

OSTI ID:: 2228744

Alternate ID(s):: OSTI ID: 2283424

Report Number(s):: INL/JOU--23-74037-Rev000

Journal Information:: Bioresource Technology, Journal Name: Bioresource Technology Vol. 384; ISSN 0960-8524

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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