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RESEARCH PRODUCT

Assessment and characterization of the bacterial community structure in advanced activated sludge systems

Daniele Di TrapaniWalter ArancioRenato FaniGiovanni BacciPaolo CinàGiorgio ManninaAnna Maria PugliaGiuseppe Gallo

subject

0106 biological sciencesEnvironmental EngineeringIFAS-MBRBiomassBioengineeringWastewater treatment010501 environmental sciencesMembrane bioreactor01 natural sciencesBioreactors010608 biotechnologyBiomassRhodobacteraceaeDNA extractionWaste Management and DisposalNGS of 16S rDNA amplicon0105 earth and related environmental sciencesSewageSettore ICAR/03 - Ingegneria Sanitaria-AmbientalebiologyRenewable Energy Sustainability and the EnvironmentChemistryMicrobiotaBiofilmGeneral Medicinebiology.organism_classificationPulp and paper industryAnoxic watersActivated sludgeBiofilmsSewage treatment16S rRNA geneBacterial communityBacteria

description

Abstract The present study is aimed to assess and characterize the structure of bacterial community in advanced activated sludge systems. In particular, activated sludge samples were collected from an Integrated Fixed-film Activated Sludge – Membrane Bioreactor pilot plant under a University of Cape Town configuration with in-series anaerobic (Noair)/anoxic (Anox)/aerobic (Oxy) reactors – and further analyzed. The achieved results – based on Next Generation Sequencing (NGS) of 16S rDNA amplicons – revealed that the bacterial biofilm (bf) communities on plastic carriers of Oxy and Anox reactors had a greater diversity compared to suspended (sp) bacterial flocs of Oxy, Anox and Noair. Indeed, the Shannon diversity indices of both biofilm communities were higher than those of suspended growth samples (Oxy-bf = 4.1 and Anox-bf = 4.2 vs. Oxy-sp = 3.4, Anox-sp = 3.5 and Noair-sp = 3.4). The most striking differences have been reported in Rhodobacteraceae being more abundant in biofilm specimens than in suspended biomass samples. The vast majority of the identified bacteria differs from those obtained by culture dependent method, thus suggesting that NGS-based method is really suitable to analyze the bacterial community composition, even in advanced systems for wastewater treatment.

yearjournalcountryeditionlanguage
2019-06-01Bioresource Technology
https://doi.org/10.1016/j.biortech.2019.03.018