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Metagenomic insight into methanogenic reactors promoting direct interspecies electron transfer via granular activated carbon.

Abstract：

:To provide insight into direct interspecies electron transfer via granular activated carbon (GAC), the effect of GAC supplementation on anaerobic digestion was evaluated. Compared to control samples, the GAC supplementation increased the total amount of methane production and its production rate by 31% and 72%, respectively. 16S rDNA sequencing analysis revealed a shift in the archaeal community composition; the Methanosarcina proportion decreased 17%, while the Methanosaeta proportion increased 5.6%. Metagenomic analyses based on shotgun sequencing demonstrated that the abundance of pilA and omcS genes belonging to Geobacter species decreased 69.4% and 29.4%, respectively. Furthermore, the analyses suggested a carbon dioxide reduction pathway rather than an acetate decarboxylation pathway for methane formation. Taken together, these results suggest that GAC improved methane production performance by shifting the microbial community and altering functional genes associated with direct interspecies electron transfer via conductive materials.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Park JH,Park JH,Je Seong H,Sul WJ,Jin KH,Park HD

doi

10.1016/j.biortech.2018.03.050

subject

Has Abstract

pub_date

2018-07-01 00:00:00

pages

414-422

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(18)30388-2

journal_volume

259

pub_type

杂志文章

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