Comparison of ammonia-oxidizing bacterial community structure in membrane-assisted bioreactors using PCR-DGGE and FISH |
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Authors: | Ziembińska A Ciesielski S Gnida A Zabczyńki S Surmacz-Górska J Miksch K |
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Institution: | The Silesian University of Technology, Environmental Biotechnology Department, Akademicka str. 2, 44-100 Gliwice, Poland. aleksandra.ziembinska@polsl.pl |
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Abstract: | The ammonia-oxidizing bacterial (AOB) communities in three membrane bioreactors (MBRs) were monitored for 2 months after an acclimation period in order to investigate the influence of sludge age and medium type on AOB changeability and its connection with nitrification effectiveness. One MBR with a sludge age of 4 days was fed with a synthetic medium, whereas the other two with sludge ages of 8 and 32 days were fed with landfill leachate. The research revealed that landfill leachate can be effectively treated in an MBR with a higher sludge age for longer periods of time and that this improvement in performance was correlated with an increase in AOB biodiversity. Interestingly, the medium type has a stronger influence on AOB biocenosis formation than the sludge age. |
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