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Aerobic deterioration of corn stalk silage and its effect on methane production and microbial community dynamics in anaerobic digestion.

Abstract：

:Ensilage is a commonly used method of preserving energy crops for biogas production. However, aerobic deterioration of silage is an inevitable problem. This study investigated the effect of aerobic deterioration on methane production and microbial community dynamics through anaerobic digestion (AD) of maize stalk silage, following 9days air exposure of silage. After air exposure, hydrolytic activity and methanogenic archaea amount in AD were reduced, decreasing the specific methane yield (SMY); whereas lignocellulose decomposition during exposure improved the degradability of silage in AD and enhanced SMY, partially compensating the dry matter (DM) loss. 29.3% of the DM and 40.7% of methane yield were lost following 0-9days exposure. Metagenomic analysis showed a shift from Clostridia to Bacteroidia and Anaerolineae in AD after silage deterioration; Methanosaetaceae was the dominant methanogenic archaea.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Zhang H,Wu J,Gao L,Yu J,Yuan X,Zhu W,Wang X,Cui Z

doi

10.1016/j.biortech.2017.09.149

subject

Has Abstract

pub_date

2018-02-01 00:00:00

pages

828-837

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(17)31714-5

journal_volume

250

pub_type

杂志文章

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