AI Article Synopsis
- The study focuses on analyzing the bacterial community structure within a Swedish activated sludge wastewater treatment plant to understand its impact on operational efficiency.
- The research employed 16S rRNA gene libraries and T-RFLP analysis over 15 months, revealing that a stable core fraction of bacteria persisted despite environmental changes.
- Notable shifts in bacterial composition were linked to seasonal variations and changes in floc structure, hinting at a potential relationship needing further investigation.
Article Abstract
The operational efficiency of activated sludge wastewater treatment plants depends to a large extent on the microbial community structure of the activated sludge. The aims of this paper are to describe the composition of the bacterial community in a Swedish full-scale activated sludge wastewater treatment plant, to describe the dynamics of the community and to elucidate possible causes for bacterial community composition changes. The bacterial community composition in the activated sludge was described using 16S rRNA gene libraries and monitored for 15 months by a terminal restriction fragment (T-RF) length polymorphism (T-RFLP) analysis of the 16S rRNA gene. Despite variable environmental conditions, a large fraction of the observed T-RFs were present at all times, making up at least 50% in all samples, possibly representing a relatively stable core fraction of the bacterial community. However, the proportions of the different T-RFs in this fraction as well as the T-RFs in the more variable fraction showed a significant variation over time and temperature. The difference in community composition between summer and winter coincided with observed differences in floc structure. These observations suggest a relationship between floc properties and bacterial community composition, although additional experiments are required to determine causality.
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| http://dx.doi.org/10.1080/09593330.2017.1411396 | DOI Listing |
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