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H2S degradation is reflected by both the activity and composition of the microbial community in a compost biofilter.
- Source :
-
Applied Microbiology & Biotechnology . Sep2006, Vol. 72 Issue 5, p1090-1098. 9p. 2 Diagrams, 2 Charts, 3 Graphs. - Publication Year :
- 2006
-
Abstract
- In this study, 16S rRNA- and rDNA-based denaturing gradient gel electrophoresis (DGGE) were used to study the temporal and spatial evolution of the microbial communities in a compost biofilter removing H2S and in a control biofilter without H2S loading. During the first 81 days of the experiment, the H2S removal efficiencies always exceeded 93% at loading rates between 4.1 and 30 g m−3 h−1. Afterwards, the H2S removal efficiency decreased to values between 44 and 71%. RNA-based DGGE analysis showed that H2S loading to the biofilter increased the stability of the active microbial community but decreased the activity-based diversity and evenness. The most intense band in both the RNA- and DNA-based DGGE patterns of the H2S-degrading biofilter represented the sulfur oxidizing bacterium Thiobacillus thioparus. This suggested that T. thioparus constituted a major part of the bacterial community and was an important primary degrader in the H2S-degrading biofilter. The decreasing H2S removal efficiencies near the end of the experiment were not accompanied by a substantial change of the DGGE patterns. Therefore, the decreased H2S removal was probably not caused by a failing microbiology but rather by a decrease of the mass transfer of substrates after agglutination of the compost particles. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01757598
- Volume :
- 72
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Applied Microbiology & Biotechnology
- Publication Type :
- Academic Journal
- Accession number :
- 22495236
- Full Text :
- https://doi.org/10.1007/s00253-006-0382-x