Lignin loss under AD in monocot and gymnosperm biomass

Malayil, Sreesha and Chanakya, H N (2019) Lignin loss under AD in monocot and gymnosperm biomass. In: ENVIRONMENTAL TECHNOLOGY & INNOVATION, 16 .

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Abstract

Lignin degradation in digesting biomass substrates of monocot and gymnosperm feedstocks fed into a biogas plant was studied and is reported for the first time with significant implications on biomethanation and bioethanol production. Around 0.013g/gTS/d lignin loss in monocots and 0.007g/gTS/d in gymnosperms was achieved during 30d. In the case of monocots the lignin degraded from substrate was found to be predominantly from cell wall and vascular bundles while in case of gymnosperms it was only from the cell walls. Changes in FT-IR spectra confirmed the alteration in core structure of lignin characterized by loss of H and S subunits in case of monocot biomass. For gymnosperms only a few S units were lost without bringing any changes to the core lignin structure. A correlation was attempted between lignin loss and loss of other constituents of biomass to understand the changes in the architecture of biomass during AD and its relevance to predicting biogas production potential.

Item Type:	Journal Article
Publication:	ENVIRONMENTAL TECHNOLOGY & INNOVATION
Publisher:	ELSEVIER
Additional Information:	copyright for this article belongs to ELSEVIER
Keywords:	Lignin degradation; Biomethanation of monocots and gymnosperms; Core lignin structure; Cell wall phenolics; Tissue architecture; Lignin loss under anaerobic digestion
Department/Centre:	Division of Mechanical Sciences > Centre for Sustainable Technologies (formerly ASTRA)
Date Deposited:	06 Jan 2020 11:25
Last Modified:	06 Jan 2020 11:25
URI:	http://eprints.iisc.ac.in/id/eprint/64214

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