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Microbiota in anaerobic digestion of sewage sludge with and without co‐substrates
Author(s) -
Walter Andreas,
Probst Maraike,
FrankeWhittle Ingrid H.,
Ebner Christian,
Podmirseg Sabine Marie,
EtemadiShalamzari Mohammad,
Hupfauf Sebastian,
Insam Heribert
Publication year - 2019
Publication title -
water and environment journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 37
eISSN - 1747-6593
pISSN - 1747-6585
DOI - 10.1111/wej.12392
Subject(s) - firmicutes , methanosaeta , bacteroidetes , proteobacteria , chloroflexi (class) , microbial population biology , archaea , anaerobic digestion , methanosarcina , substrate (aquarium) , biology , food science , microbiology and biotechnology , chemistry , environmental chemistry , bacteria , ecology , methane , 16s ribosomal rna , genetics
In this study, seven full‐scale anaerobic digesters, with or without co‐substrate regime, were analysed by physicochemical and molecular biological methods. A combination of robust community fingerprinting and Illumina MiSeq sequencing revealed a core bacterial community dominated by Chloroflexi , Firmicutes , Bacteroidetes and Proteobacteria , with variations in the profiles because of differences in the co‐substrate feeding regime. Despite these differences, physicochemical properties revealed a stable performance of all reactors, indicating a resilient bacterial microbiota in all full‐scale reactors. A rich bacterial core community ensured reactor functionality, whilst feeding regime and reactor type impacted the overall and the core bacterial diversity. Within the Archaea , Methanosaeta dominated in all reactors. Results indicated no relationship between archaeal community structure and the type of co‐substrate digested. Methanogens rely on the metabolic end products of bacterial activity and are thus less dependent on differences in the initial co‐substrate regime.