Microbial community analysis in biologically active filters exhibiting efficient removal of emerging contaminants and impact of operational conditions

The Science of the Total Environment
Shuangyi ZhangLisa Axe

Abstract

In biologically active filters (BAFs), microorganisms acclimated on the media surface are the key players responsible for removing organic water contaminants. In this study, next generation sequencing by Illumina MiSeq was used to characterize the microbial community structures in the influent, effluent, and media of a set of bench-scale BAFs that have been demonstrated with high removal efficiency (>75%) of 16 contaminants of emerging concern (CECs), which include a variety of pharmaceuticals (e.g., sulfamethoxazole and ibuprofen), X-ray contrast agent (i.e., iopromide), and pesticides (e.g., atrazine) that are prevalently found in municipal waste streams. Proteobacteria and Planctomycetes were the most abundant phyla in filter media, while the influent and effluent samples were dominated by Proteobacteria, Actinobacteria, and Chlamydiae. Factorial and principal component analysis revealed microbial structures in the media were significantly affected by the operation conditions, including media type (GAC versus dual media anthracite sand), EBCT (10 versus 18 min), and pre-ozonation. Detrended correspondence analysis demonstrated media materials predominantly governed the structures of the acclimated biofilm in BAFs as they pro...Continue Reading

Citations

Sep 8, 2019·Environmental Science and Pollution Research International·Archanaa SundararaghavanGadi K Suraishkumar
Aug 16, 2019·Engineering Reports : Open Access·Bineyam MezgebeE Sahle-Demessie
May 5, 2021·The Science of the Total Environment·Tatiana C Guarin, Krishna R Pagilla

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