Comparison of microbial communities in four different composting processes as evaluated by denaturing gradient gel electrophoresis analysis

Aims: We aimed to systematically understand the composting processes by a comparison of microbial communities during four full‐scale composting processes. Methods and Results: Microbial communities during the four different full‐scale composting processes were analysed by denaturing gradient gel ele...

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Veröffentlicht in:Journal of applied microbiology 2003-01, Vol.95 (1), p.109-119
Hauptverfasser: Ishii, K., Takii, S.
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description Aims: We aimed to systematically understand the composting processes by a comparison of microbial communities during four full‐scale composting processes. Methods and Results: Microbial communities during the four different full‐scale composting processes were analysed by denaturing gradient gel electrophoresis combined with measurement of physicochemical parameters. Two composting processes utilized sewage sludge and two utilized food‐waste. Comparison of the four processes indicated that the concentration of dissolved organic carbon was higher in the food‐waste‐composting than in the sewage‐sludge‐composting processes, and microbial communities varied with composting substrate. The tendency for different microbes to appear in the composting process with different concentrations of dissolved organic carbon agreed with a previous study that showed that microbial succession occurred with a decrease in dissolved organic carbon in a laboratory‐scale food‐waste‐composting process. Conclusions: Our results suggested that the main factor affecting microbial communities in the composting process is the concentration of dissolved organic materials. Significance and Impact of the Study: In addition to studying microbial communities involved in composting, this research is also the first to study composting mechanisms using molecular methods. The results of our studies may be helpful in the design and management of composting processes.
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Conclusions: Our results suggested that the main factor affecting microbial communities in the composting process is the concentration of dissolved organic materials. Significance and Impact of the Study: In addition to studying microbial communities involved in composting, this research is also the first to study composting mechanisms using molecular methods. 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Methods and Results: Microbial communities during the four different full‐scale composting processes were analysed by denaturing gradient gel electrophoresis combined with measurement of physicochemical parameters. Two composting processes utilized sewage sludge and two utilized food‐waste. Comparison of the four processes indicated that the concentration of dissolved organic carbon was higher in the food‐waste‐composting than in the sewage‐sludge‐composting processes, and microbial communities varied with composting substrate. The tendency for different microbes to appear in the composting process with different concentrations of dissolved organic carbon agreed with a previous study that showed that microbial succession occurred with a decrease in dissolved organic carbon in a laboratory‐scale food‐waste‐composting process. Conclusions: Our results suggested that the main factor affecting microbial communities in the composting process is the concentration of dissolved organic materials. Significance and Impact of the Study: In addition to studying microbial communities involved in composting, this research is also the first to study composting mechanisms using molecular methods. 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source Oxford University Press Journals All Titles (1996-Current); MEDLINE; Wiley Online Library Journals Frontfile Complete
subjects 16S rDNA
Bacterial Physiological Phenomena
bacterial primer
Base Sequence - genetics
Biodegradation, Environmental
Biological and medical sciences
Biological treatment of sewage sludges and wastes
Biotechnology
Carbon - analysis
Colony Count, Microbial - methods
composting
denaturing gradient gel electrophoresis analysis
DNA, Ribosomal - analysis
Electrophoresis - methods
Environment and pollution
Food Microbiology
Fundamental and applied biological sciences. Psychology
Industrial applications and implications. Economical aspects
microbial succession
Nitrogen - analysis
Phylogeny
Polymerase Chain Reaction - methods
Sewage - microbiology
Waste Management - methods
title Comparison of microbial communities in four different composting processes as evaluated by denaturing gradient gel electrophoresis analysis
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