Abstract

DIAZ-RUIZ, Angie Natalie et al. Funcional dynamics of the bacterial community from activated sludge wastewater treatment plant and its relationship with environmental and operational variables. Rev. colomb. biotecnol [online]. 2022, vol.24, n.2, pp.26-35.  Epub Mar 07, 2023. ISSN 0123-3475.  https://doi.org/10.15446/rev.colomb.biote.v24n2.101036.

Activated sludge process is commonly used in wastewater treatment plants (WWTP) where a microbial community removes the organic matter from the influent. Despite the advances in the study of this community, there is still a gap of knowledge about its functional potential and its variability due to temporary fluctuations of the influent and the WWTP operation. Therefore, this work analyzed the metabolic potential variation of the activated sludge bacterial community throughout an annual cycle. Furthermore, the dynamics of the bacterial community was related to environmental and operating variables of a WWTP with combined sewerage. The metagenome prediction of the bacterial community was carried out with PICRUSt2. This approach allowed to demonstrate the phenomenon of functional redundancy in the community. Moreover, the temporal fluctuation of genes associated with the nitrogen and sulfur cycles and their relationship with environmental and the operating variables of the WWTP were analyzed. It was found that those processes were differentially related to precipitation events and variations in the sludge age observed during the studied period. These results contribute to the understanding of the bacterial community dynamics in relation to the functioning of this type of biotechnological systems.

Keywords : combined influent; sludge age; energy metabolism; rainfall; functional redundancy.

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