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Microbial Shifts in Anaerobic Digestion Towards Phenol Inhibition with and Without Hydrochar as Revealed by Metagenomic Binning by Jun He; Tao Luo; Zhijian Shi; Irini Angelidaki; Shicheng Zhang; Gang Luo is a Environmental Science article available to read on EtoBox.

What is Microbial Shifts in Anaerobic Digestion Towards Phenol Inhibition with and Without Hydrochar as Revealed by Metagenomic Binning about?

The inhibition of anaerobic digestion (AD) by phenolic compounds is an obstacle to the efficient treatment of organic wastes. Besides, hydrochar produced from hydrothermal liquefaction of biomass has been previously reported to enhance AD. The present study aimed to provide deep insights into the microbial shifts at the species level to phenol (0-1.5 g/L) inhibition in AD of glucose with and without hydrochar by metagenomic analysis. Phenol higher than 1 g/L had severe inhibition on both the amount and rate of methane production in control experiments, while hydrochar significantly enhanced methane production, especially at phenol 1 g/L and 1.5 g/L. From metagenomic analysis, 78 High-quality metagenome-assembled genomes (MAGs) were obtained. Principal components analysis showed that the microbial communities were shifted when phenol concentration was increased to 0.25 g/L in control experiments and 1 g/L in hydrochar experiments. In control experiments, no MAGs involved in acetogenesis were found at phenol 1.5 g/L and Methanothrix sp.FDU243 was also inhibited. However, hydrochar resulted in the maintenance of several MAGs involved in acetogenesis and Methanothrix sp.FDU243 even at

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Author

Jun He; Tao Luo; Zhijian Shi; Irini Angelidaki; Shicheng Zhang; Gang Luo

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Environmental Science (Physical Sciences)