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RESEARCH PRODUCT

Simultaneous sludge minimization, biological phosphorous removal and membrane fouling mitigation in a novel plant layout for MBR.

Gaspare VivianiDaniele Di TrapaniSanto Fabio CorsinoMichele TorregrossaTaissa Silva De Oliveira

subject

Membrane foulingEndogenous P-releaseEnvironmental EngineeringHydraulic retention timeNitrogen0208 environmental biotechnologychemistry.chemical_element02 engineering and technology010501 environmental sciencesManagement Monitoring Policy and LawMembrane bioreactor01 natural sciencesWaste Disposal FluidNutrientBioreactorsAnaerobic reactorSludge minimization.Waste Management and Disposal0105 earth and related environmental sciencesSettore ICAR/03 - Ingegneria Sanitaria-AmbientaleSewageChemistryMembrane foulingMembranes ArtificialPhosphorusGeneral MedicinePulp and paper industryBiological nutrients removalNitrogen020801 environmental engineeringMembrane BioReactorPolyphosphate-accumulating organisms

description

Abstract The integration of one anaerobic reactor in the mainstream (AMSR) of a pre-denitritication-MBR was evaluated with the aim to achieve simultaneous sludge minimization and phosphorous removal. The excess sludge production was reduced by 64% when the AMSR was operated under 8 h of hydraulic retention time (HRT). The highest nutrients removal performances referred to organic carbon (98%), nitrogen (90%) and phosphorous (97%) were obtained under 8 h of HRT. In contrast, prolonged anaerobic-endogenous conditions were found to be detrimental for all nutrients removal performances. Similarly, the lowest membrane fouling tendency (FR = 0.65∙1011 m−1 d−1) was achieved under 8 h of HRT, whereas it significantly increased under higher HRT. The highest polyphosphate accumulating organisms kinetics were achieved under HRT of 8 h, showing very high exogenous P-release (46.67 mgPO4-P gVSS−1 h−1) and P-uptake rates (48.6 mgPO4-P gVSS−1 h−1), as well as a not negligible P-release rate under endogenous conditions at low COD/P ratio (≈1).

yearjournalcountryeditionlanguage
2020-04-01Journal of environmental management
10.1016/j.jenvman.2019.109826https://pubmed.ncbi.nlm.nih.gov/32072954