Search results for "granule size"

showing 2 items of 2 documents

Simultaneous nitrogen and organic carbon removal in aerobic granular sludge reactors operated with high dissolved oxygen concentration

2013

Simultaneous nitrification and denitrification (SND) together with organic removal in granules is usually carried out without Dissolved Oxygen (DO) concentration control, at ‘‘low DO’’ (with a DO 7–8 mg/L, during feast and famine conditions respectively). In particular, different strategies of cultivation and several organic and nitrogen loading rate have been applied, in order to eval- uate the efficiencies in SND process without dissolved oxygen control. The results show that, even under conditions of high DO concentration, nitrogen and organic matter can be simultaneously removed, with efficiency >90%. Nevertheless, the biological conditions in the inner layer of the granule may change sig- …

Environmental EngineeringNitrogenchemistry.chemical_elementPilot ProjectsBioengineeringSimultaneous nitrification-denitrificationBioreactorsLong periodOrganic matterWaste Management and DisposalTotal organic carbonchemistry.chemical_classificationSewageSettore ICAR/03 - Ingegneria Sanitaria-AmbientaleRenewable Energy Sustainability and the EnvironmentGranule (cell biology)Environmental engineeringGeneral MedicineNitrogenAerobiosisCarbonOxygenSolubilitychemistryAerobic granular sludge Granule size Nutrient removal Feast-famine SND processEnvironmental chemistryLoading rateParticle size
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Small-sized granules of biphasic bone substitutes support fast implant bed vascularization

2015

The present study investigated the influence of granule size of 2 biphasic bone substitutes (BoneCeramic® 400-700 μm and 500-1000 μm) on the induction of multinucleated giant cells (MNGCs) and implant bed vascularization in a subcutaneous implantation model in rats. Furthermore, degradation mechanisms and particle phagocytosis of both materials were examined by transmission electron microscopy (TEM). Both granule types induced tissue reactions involving primarily mononuclear cells and only small numbers of MNGCs. Higher numbers of MNGCs were detected in the group with small granules starting on day 30, while higher vascularization was observed only at day 10 in this group. TEM analysis reve…

Foreign-body giant cellPathologymedicine.medical_specialtyMaterials sciencebiphasic bone substitutePhagocytosisBiomedical EngineeringNeovascularization PhysiologicMedicine (miscellaneous)Giant CellsPeripheral blood mononuclear cellBone and BonesBiomaterialsMiceMultinucleatevascularizationMaterials TestingmedicineAnimalsParticle SizedegradationGranule (cell biology)granule sizephagocytosisGeneral MedicineRatsCell biologyDisease Models AnimalTransmission electron microscopyGiant cellBone SubstitutesLeukocytes MononuclearMicroscopy Electron ScanningBoneCeramicFemaleHydroxyapatitesImplantmultinucleated giant cellsResearch PaperBiomatter
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