Microbial community dynamics in mesophilic anaerobic co-digestion of mixed waste

This paper identifies key components of the microbial community involved in the mesophilic anaerobic co-digestion (AD) of mixed waste at Rayong Biogas Plant, Thailand. The AD process is separated into three stages: front end treatment (FET); feed holding tank and the main anaerobic digester. The stu...

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Bibliographic Details
Published in:Bioresource technology 2011-03, Vol.102 (5), p.4021-4027
Main Authors: Supaphol, Savaporn, Jenkins, Sasha N., Intomo, Pichamon, Waite, Ian S., O’Donnell, Anthony G.
Format: Article
Language:English
Subjects:
Anaerobic treatment
Applied sciences
Bacteria
Bacteria - genetics
Bacteria - metabolism
Biological and medical sciences
Biological treatment of sewage sludges and wastes
Biota
Biotechnology
Canonical correspondence analysis (CCA)
Communities
Denaturing Gradient Gel Electrophoresis
Denaturing gradient gel electrophoresis (DGGE)
Digesters
Dynamics
Environment and pollution
Exact sciences and technology
Fundamental and applied biological sciences. Psychology
Industrial applications and implications. Economical aspects
Mesophilic anaerobic digestion
Metagenomics
Methane - biosynthesis
Methanosaeta
Methanosarcinales - genetics
Methanosarcinales - metabolism
Microbial community structure
Microorganisms
Municipal solid waste (MSW)
Pathways
Pollution
Polymerase Chain Reaction
Refuse Disposal - methods
RNA, Ribosomal, 16S - genetics
Species Specificity
Thailand
Wastes
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Summary:This paper identifies key components of the microbial community involved in the mesophilic anaerobic co-digestion (AD) of mixed waste at Rayong Biogas Plant, Thailand. The AD process is separated into three stages: front end treatment (FET); feed holding tank and the main anaerobic digester. The study examines how the microbial community structure was affected by the different stages and found that seeding the waste at the beginning of the process (FET) resulted in community stability. Also, co-digestion of mixed waste supported different bacterial and methanogenic pathways. Typically, acetoclastic methanogenesis was the major pathway catalysed by Methanosaeta but hydrogenotrophs were also supported. Finally, the three-stage AD process means that hydrolysis and acidogenesis is initiated prior to entering the main digester which helps improve the bioconversion efficiency. This paper demonstrates that both resource availability (different waste streams) and environmental factors are key drivers of microbial community dynamics in mesophilic, anaerobic co-digestion.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2010.11.124