Evolution of bacterial diversity during two-phase olive mill waste ("alperujo") composting by 16S rRNA gene pyrosequencing.

Abstract:

:Microorganisms are the main contributing factor responsible for organic matter degradation during composting. In this research, the 454-pyrosequencing of the 16S rRNA gene was used to elucidate evolution of bacterial diversity during mesophilic, thermophilic and maturation composting stages of the two-phase olive mill waste ("alperujo"), the main by-product of the Spanish olive oil industry. Two similar piles were performance composting AL with sheep manure as bulking agent. Actinobacteria, Bacteriodetes, Firmicutes and Proteobacteria were the main phyla found in genomic libraries from each composting phase. Shannon and Chao1 biodiversity indices showed a clear difference between the mesophilic/thermophilic and maturation phases, which was mainly due to detection of new genera. PCA analysis of the relative number of sequences confirmed maturation affected bacterial population structure, and Pearson correlation coefficients between physicochemical composting parameters and relative number of genera sequences suggest that Planomicrobium and Ohtaekwangia could be considered as biomarkers for AL composting maturation.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Tortosa G,Castellano-Hinojosa A,Correa-Galeote D,Bedmar EJ

doi

10.1016/j.biortech.2016.11.098

subject

Has Abstract

pub_date

2017-01-01 00:00:00

pages

101-111

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(16)31619-4

journal_volume

224

pub_type

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