6533b824fe1ef96bd1280b7c
RESEARCH PRODUCT
Study of aerobic granular sludge stability in a continuous-flow membrane bioreactor.
Gaspare VivianiSanto Fabio CorsinoMichele TorregrossaRiccardo CampoG. Di Bellasubject
FlocculationEnvironmental EngineeringAerobic granular sludge (AGS)Segmented filamentous bacteria0208 environmental biotechnologyMicrobial ConsortiaBiomassBioengineering02 engineering and technology010501 environmental sciencesMembrane bioreactor01 natural sciencesWaste Disposal FluidBioreactorsBreakageBioreactorPressureBiomassWaste Management and Disposal0105 earth and related environmental sciencesContinuous-flow reactorSettore ICAR/03 - Ingegneria Sanitaria-AmbientaleBacteriaSewageRenewable Energy Sustainability and the EnvironmentChemistryContinuous flowFeast/famine conditionMembraneEnvironmental engineeringWashoutFlocculationGeneral MedicineEquipment DesignPulp and paper industryAerobiosis020801 environmental engineeringHydraulic selection pressureAerobic granular sludge (AGS); Continuous-flow reactor; Feast/famine conditions; Hydraulic selection pressure; Membrane; Bioengineering; Environmental Engineering; Waste Management and Disposaldescription
A granular continuous-flow membrane bioreactor with a novel hydrodynamic configuration was developed to evaluate the stability of aerobic granular sludge (AGS). Under continuous-flow operation (Period I), AGS rapidly lost their structural integrity resulting in loose and fluffy microbial aggregates in which filamentous bacteria were dominant. The intermittent feeding (Period II) allowed obtaining the succession of feast and famine conditions that favored the increase in AGS stability. Although no further breakage occurred, the formation of new granules was very limited, owing to the absence of the hydraulic selection pressure. These results noted the necessity to ensure, on the one hand the succession of feast/famine conditions, and on the other, the hydraulic selection pressure that allows flocculent sludge washout. This preliminary study shows that the proposed configuration could meet the first aspect; in contrast, biomass selection needs to be improved.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-07-31 | Bioresource technology |