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Review
. 2023 Feb 25:861:160552.
doi: 10.1016/j.scitotenv.2022.160552. Epub 2022 Nov 28.

Recent advancements in strategies to improve anaerobic digestion of perennial energy grasses for enhanced methane production

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Review

Recent advancements in strategies to improve anaerobic digestion of perennial energy grasses for enhanced methane production

Yingjin Song et al. Sci Total Environ. .

Abstract

Perennial energy grasses (PEGs) are supposed to be a momentous heading to the development of biomass energy on account of their characteristic superiorities of high yield, strong adaptability and no direct competition with food crops. Anaerobic digestion of PEGs with great biogas-producing potential occupies an irreplaceable status despite a variety of pathways for conversion to renewable energy. However, efficient digestion of PEGs suffers from severe challenges in connection with feedstock properties such as recalcitrant structures. This review highlights recent research in anaerobic digestion of PEGs and focuses on essential aspects enhancing anaerobic digestion performance: types and properties of grasses, diverse pretreatments, various co-feedstocks for co-digestion, dosing of different additives, and improvements in reactors. General discussions on the future prospects of anaerobic digestion of PEGs are proposed. Overcoming knowledge gaps and technical limitations will facilitate further application of PEGs on an industrial scale.

Keywords: Anaerobic digestion; Biogas; Methane; Micro-aerobic environment; Perennial energy grasses; Renewable energy.

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Conflict of interest statement

Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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