Search results for "Waste component removal"

showing 3 items of 3 documents

Metabolic shift of polyphosphate-accumulating organisms with different levels of polyphosphate storage

2012

Previous studies have shown that polyphosphate-accumulating organisms (PAOs) are able to behave as glycogen-accumulating organisms (GAOs) under different conditions. In this study we investigated the behavior of a culture enriched with Accumulibacter at different levels of polyphosphate (poly-P) storage. The results of stoichiometric ratios Gly degraded/HAc uptake, PHB synthesized/HAc uptake, PHV synthesized/HAc uptake and P release/HAc uptake confirmed a metabolic shift from PAO metabolism to GAO metabolism: PAOs with high poly-P content used the poly-P to obtain adenosine tri-phosphate (ATP), and glycogen (Gly) to obtain nicotinamide adenine dinucleotide (NADH) and some ATP. In a test whe…

Accumulibacter Type IIWaste component removalUnclassified drugPhysiologyChemical compositionMicrobial metabolismStorageWastewaterNicotinamide adenine dinucleotidePolyhydroxyalkanoic acidchemistry.chemical_compoundBacteriumBioreactorsPolyphosphatesGlycolysisAnaerobiosisBiomassPolyphosphate-accumulating organismsWaste Management and DisposalAccumulibacter Type IGlycogen accumulating organismPriority journalWater Science and TechnologyFluorescence microscopyPolyhydroxyvalerateSewageGlycogenHydrolysisFluorescence in situ hybridizationEcological ModelingPhosphorusHydrogen-Ion ConcentrationBioaccumulationPollutionStoichiometryWaste treatmentPolyphosphate-accumulating organismsBiodegradation EnvironmentalEnhanced biological phosphorus removalBiochemistryGlycogen-accumulating metabolism (GAM)Nicotinamide adenine dinucleotideAccumulibacter type 1Accumulibacter type 2GlycolysisGlycogenMetabolic Networks and PathwaysAccumulibacterAdenosine triphosphateEnvironmental EngineeringBiologyAcetic acidArticleAssociative storagePolyphosphate-accumulating metabolism (PAM)PolyphosphateGlycogen-accumulating organismsGlycogen-accumulating metabolismsTECNOLOGIA DEL MEDIO AMBIENTEPolyphosphate accumulating organismCivil and Structural EngineeringPolyphosphate-accumulating organisms (PAO)BacteriaPolyphosphateMetabolismIn situ measurementGlycogen-accumulating organisms (GAO)Polyphosphate-accumulating metabolismsNonhumanAmidesCarbonMetabolismchemistryPolyphosphate (poly-P)Bacterial metabolismCell cultureVolatilizationWater Research
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Effect of pH and nitrite concentration on nitrite oxidation rate

2011

The effect of pH and nitrite concentration on the activity of the nitrite oxidizing bacteria (NOB) in an activated sludge reactor has been determined by means of laboratory batch experiments based on respirometric techniques. The bacterial activity was measured at different pH and at different total nitrite concentrations (TNO 2). The experimental results showed that the nitrite oxidation rate (NOR) depends on the TNO 2 concentration independently of the free nitrous acid (FNA) concentration, so FNA cannot be considered as the real substrate for NOB. NOB were strongly affected by low pH values (no activity was detected at pH 6.5) but no inhibition was observed at high pH values (activity wa…

Waste component removalPH rangeUnclassified drugRespirometric techniqueLaboratory methodPHOxidation ratesPH valueNitriteSaturation constantBatch reactorPH effectOxidation kineticsDissociation constantNitrobacterKinetic expressionWaste Disposal FluidInhibition constantschemistry.chemical_compoundBacteriumBioreactorsNitrous acidNitriteBacterial activityReaction kineticsBacteria (microorganisms)Waste Management and DisposalIn Situ Hybridization FluorescenceInhibitionPriority journalFree nitrous acidMicroscopyNitrous acidSewagebiologyFluorescence in situ hybridizationPH effectsGeneral MedicineSaturationRespirometryHydrogen-Ion ConcentrationInorganic acidsNitrite oxidizing bacteriaCalibrationOxidation-ReductionEnvironmental EngineeringInorganic chemistryBioreactorParameterizationBioengineeringActivated sludge reactorsArticleNumerical modelNitrous acid derivativeReaction rateParameter calibrationBatch experimentsNitrite-oxidizing bacteriaOxidationDietary NitrateNitritesTECNOLOGIA DEL MEDIO AMBIENTEExperimental studyBacteriaConcentration (process)Renewable Energy Sustainability and the EnvironmentBacteriologyNitrobacterOxidation reductionNitrogen removalConcentration (composition)biology.organism_classificationInorganic acidsMicrobial activityKineticschemistryActivated sludgeNitrite oxidationHigh pH valueSwitch functionConcentration (parameters)Oxidation processEffect of pHProtein expressionSubstrateControlled studyWaste disposalBioresource Technology
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Modelling biological and chemically induced precipitation of calcium phosphate in enhanced biological phosphorus removal systems

2011

The biologically induced precipitation processes can be important in wastewater treatment, in particular treating raw wastewater with high calcium concentration combined with Enhanced Biological Phosphorus Removal. Currently, there is little information and experience in modelling jointly biological and chemical processes. This paper presents a calcium phosphate precipitation model and its inclusion in the Activated Sludge Model No 2d (ASM2d). The proposed precipitation model considers that aqueous phase reactions quickly achieve the chemical equilibrium and that aqueous-solid change is kinetically governed. The model was calibrated using data from four experiments in a Sequencing Batch Rea…

Precipitation (chemical)Waste component removalCalcium PhosphatesKinematicsPrecipitation (chemistry)Sequencing batch reactorWastewater treatmentPrecipitationActivated sludge modelWastewaterChemicals removal (water treatment)Precipitation processchemistry.chemical_compoundMathematical modelCalcium ionAqueous solutionChemical PrecipitationAmorphous calcium phosphateChemical equilibriumsEnvironmental RemediationWaste Management and DisposalEnvironmental Restoration and RemediationCalcium concentrationPriority journalWater Science and TechnologyWaste water managementMathematical modellingChemistryEcological ModelingPhosphorusPollutionRaw wastewatersSequencing batch reactorAmorphous calcium phosphateBiodegradation EnvironmentalEnhanced biological phosphorus removalPollutant removalCalibrationCrystallizationEnvironmental EngineeringInorganic chemistryAqueous phase reactionschemistry.chemical_elementArticleHydroxyapatitePhosphatesNumerical modelSolidChemical engineeringPhysicochemical propertyComputer SimulationCalcium phosphate precipitationBiological water treatmentTECNOLOGIA DEL MEDIO AMBIENTECivil and Structural EngineeringActivated sludge modelActivated sludge processBatch reactorsPrecipitation (chemistry)PhosphorusPrecipitation modelPhosphateChemical processKineticsActivated sludgeCalcium phosphateModels ChemicalActivated sludgePotassiumEnhanced biological phosphorus removalCalciumExperimentsSequencing batch reactorsCalcium phosphate dibasicHydrogenWater Research
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