6533b82bfe1ef96bd128ce79
RESEARCH PRODUCT
Sequential batch membrane bio-reactor for wastewater treatment: The effect of increased salinity
Alida CosenzaGiorgio ManninaGaspare VivianiDaniele Di TrapaniMarco Capodicisubject
Membrane foulingSalinityRespirometric batch testEnvironmental EngineeringBiofoulingOrganic carbon and nitrogen removal0208 environmental biotechnologyBiomassPilot ProjectsBioengineering02 engineering and technologyWastewater010501 environmental sciencesMembrane bioreactor01 natural sciencesBioreactorsWaste ManagementExtracellular polymeric substanceBioreactorBiomassWaste Management and Disposal0105 earth and related environmental sciencesBiological Oxygen Demand AnalysisFoulingSettore ICAR/03 - Ingegneria Sanitaria-AmbientaleRenewable Energy Sustainability and the EnvironmentChemistryMembrane foulingEnvironmental engineeringMembranes ArtificialGeneral MedicinePulp and paper industryNitrificationCarbon020801 environmental engineeringSalinityWastewaterExtracellular polymeric substances; Membrane fouling; Organic carbon and nitrogen removal; Respirometric batch tests; Salinity; Bioengineering; Environmental Engineering; Waste Management and DisposalNitrificationdescription
In this work, a sequential batch membrane bioreactor pilot plant is investigated to analyze the effect of a gradual increase in salinity on carbon and nutrient removal, membrane fouling and biomass kinetic parameters. The salinity was increased by 2 g NaCl L-1 per week up to 10 g NaCl L-1. The total COD removal efficiency was quite high (93%) throughout the experiment. A gradual biomass acclimation to the salinity level was observed during the experiment, highlighting the good recovery capabilities of the system. Nitrification was also influenced by the increase in salinity, with a slight decrease in nitrification efficiency (the lowest value was obtained at 10 g NaCl L-1 due to lower nitrifier activity). Irreversible cake deposition was the predominant fouling mechanism observed during the experiment. Respirometric tests exhibited a stress effect due to salinity, with a reduction in the respiration rates observed (from 8.85 mgO2 L-1 h-1 to 4 mgO2 L-1 h-1).
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-01-01 |