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C/N ratio-induced structural shift of bacterial communities inside lab-scale aquaculture biofilters ArchiMer
Michaud, Luigi; Lo Giudice, Angelina; Interdonato, Filippo; Triplet, Sebastien; Ying, Luo; Blancheton, Jean-paul.
In Recirculating Aquaculture Systems (RAS) various chemical compounds (mainly nitrates and organic carbon) accumulate in the rearing water. These chemical substrata regulate the ecophysiology of the bacterial communities of the biofilter and have an impact on its nitrification efficiency and reliability. In the present study chemical and microbiological parameters in static mineral bed (SBB) and moving plastic bed (MBB) biological filters were monitored at increasing C/N ratios ranging from 0 (pure nitrification) to 4 (combined nitrification and organic carbon removal), with the aim to investigate the shift of the bacterial community structure and major taxa relative abundances. Results suggest that the MBB are less subjected to the nitrification...
Tipo: Text Palavras-chave: Recirculating aquaculture system; Biofilters; C/N ratio; Microbial community structure.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00167/27846/26070.pdf
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