Microbial characteristics of biogas

The microbial diversity of biogas was analyzed in order to examine the aerosolization behavior of microorganisms. Six biogas samples were analyzed: five from mesophilic and thermophilic anaerobic digestors treating different wastes, and one from landfill. Epifluorescent microscopic counts revealed 1...

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Bibliographic Details
Published in:Water science and technology 2008-01, Vol.57 (4), p.595-599
Main Authors: Moletta, M, Wery, N, Godon, J.J
Format: Article
Language:English
Subjects:
Actinobacteria
Aerobic microorganisms
Aerosols
Air Microbiology
alpha-Proteobacteria
anaerobic digesters
Anaerobic digestion
Anaerobic microorganisms
Anaerobic treatment
Aquatic life
Bacteria - classification
Bacteria - genetics
Bacteria - isolation & purification
Bacteroides
beta-Proteobacteria
Biogas
Bioreactors
Chloroflexaceae group
delta-Proteobacteria
Deoxyribonucleic acid
DNA
DNA, Bacterial - genetics
Earth Sciences
Electron microscopes
Firmicutes
fluorescence
gamma-Proteobacteria
Hydrology
Industrial Waste
Landfills
microbial ecology
Microorganisms
microscopy
Pathogens
Refuse Disposal
Ribosomal DNA
RNA, Ribosomal, 16S - genetics
Sciences of the Universe
Sequence Analysis, RNA
Spirochaetales
Sulfate reduction
sulfate-reducing bacteria
Sulphate reduction
Thermophilic microorganisms
Thermotoga
Waste disposal sites
waste treatment
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Summary:The microbial diversity of biogas was analyzed in order to examine the aerosolization behavior of microorganisms. Six biogas samples were analyzed: five from mesophilic and thermophilic anaerobic digestors treating different wastes, and one from landfill. Epifluorescent microscopic counts revealed 10(6) prokarya m(-3). To assess the difference occuring in aerosolization, 498 biogas-borne 16S ribosomal DNA were analyzed and compared to published anaerobic digestor microbial diversity. Results show a large microbial diversity and strong discrepancy with digestor microbial diversity. Three different aerosolisation behaviour patterns can be identified: (i) that of non-aerosolized microorganisms, Deltaproteobacteria, Spirochaetes, Thermotogae, Chloroflexi phyla and sulfate-reducing groups, (ii) that of passively aerosolized microorganisms, including Actinobacteria, Firmicutes and Bacteroidetes phyla and (iii) that of preferentially aerosolized microorganisms, including Alphaproteobacteria, Betaproteobacteria, Gammaproteobacteria, as well as strictly aerobic and occasionally pathogenic species, presented high levels of aerosolization.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2008.107