Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 67 for “"Clarifier"”.
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Secondary Clarifier Modeling: A Multi-Process Approach
… dissolved solids concentration. A Quasi-3D (Q3D) clarifier model has been developed to include the following factors: axisymmetric hydrodynamics (including the swirl component), five types of settling (nonsettleable particles, unflocculated discrete settling, flocculated discrete settling, …
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The catalytic oxidation of manganese in water treatment clarification processes
… manganese in water treatment floc blanket clarifiers has been studied. The removal mechanisms may be broadly classed as adsorption and oxidation. Adsorption of manganese (II) occurs rapidly and is completed in less than five minutes under conditions prevailing in a floe blanket clarifier. …
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The biological removal of phosphorus at the Clark County Sanitation District wastewater treatment plant
… nitrogen gas that lifted microbes into the clarifier effluent. Weak denitrification allowed for the release of Ortho-P from the microbes into the clarifier effluent. Moderate amounts of denitrification stalled phosphorus release and did not lift microbes into the effluent.
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Start-up and shock loading characteristics of a rotating biological contactor package plant
… wastewater treatment plant. Municipal primary clarifier effluent was pumped into the 600 gpd rated RBC unit at the rate of 480 gpd for a period of 4 1/2 months. The RBC unit contained a primary clarifier, four stages of discs, and a secondary clarifier. A thorough sampling and analysis program …
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Est-ce que les enfants autistes réussissent mieux une tâche de recherche globale/locale que les enfants à développement typique?
"Le présent projet de recherche a pour but de clarifier les recherches faites sur les troubles visuo-spatiaux des enfants atteints d'autisme".
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Evaluation of factors affecting the performance of biological phosphorus removal in a full-scale wastewater treatment plant
… a 10-month period in a basin and in a secondary clarifier of the plant. Samples were analyzed for nitrate, total and ortho-phosphorus, COD, acetic acid, polyhydroxybutyrate, glycogen, calcium, magnesium, potassium, ammonia, alkalinity, TSS, ORP, pH, and DO. Profiles of the aerobic and anaerobic …
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Les rôles de la personne enseignante et de l’élève dans la pédagogie par projet
… L’objectif de cette recherche est de décrire et clarifier les rôles de l’enseignant et de l’élève en fonction des étapes de la PPP, afin de soutenir une pratique plus cohérente et partagée. Pour ce faire, l’étude mobilise plusieurs modèles théoriques (notamment ceux de Proulx, Pan et al., Arpin …
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The Effects Of Ph On Enhanced Biological Phosphorus Removal (ebpr) With Propionic Acid As The Dominant Volatile Fatty Acid (vfa)
… of the effect of P release in the secondary clarifier of Train 2 (high pH). However, on a specific basis it was clear that net P uptake was either equal or better in the low-pH system regardless of how the secondary clarifier data was interpreted. Carbon transformations were not impacted in …
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Le problème de l'objectivation chez Karl Marx
Cette recherche a tenté de clarifier le concept de l'objectivation chez le jeune Karl Marx. L'objectivation occupe dans la pensée marxiste une place prépondérante et appliquée au travail, elle assure une compréhension de ce que sont les divers visages de l'aliénation. En même temps, l'objectivation …
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ΔΙΗΘΗΣΗ-ΚΡΟΚΚΙΔΩΣΗ ΜΕΣΩ ΒΑΘΕΟΣ ΚΟΚΚΩΔΟΥΣ ΣΤΡΩΜΑΤΟΣ ΠΥΚΝΩΝ ΑΙΩΡΗΜΑΤΩΝ ΜΕΤΑΛΛΕΥΤΙΚΗΣ-ΜΕΤΑΛΛΟΥΡΓΙΚΗΣ ΠΡΟΕΛΕΥΣΗΣ
… BED GRANULAR FILTER WHEN USED AS A FLOCCULATOR-CLARIFIER ESPECIALLY THE INFLUENCE OF FLOCCULATION INTO THE PORES OF GRANULAR MEDIA IN DEEP BED FILTRATION DURING THE FILTRATION OF RED MUDE SUSPENSIONS . IT WAS FOUND THAT FLOCCULATION CONTROLS THE OPERATION AND THEEFFICIENCY OF THE GRANULAR MEDIA …
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Utilization of a combined activated sludge fixed film media system for treatment of a high strength, high ammonia, industrial wastewater
… little or no increase in solids loading to the clarifier. The ideal combined system can treat higher organic and ammonia loadings than a conventional system, and is more resistant to temperature changes and shock loadings. Overloaded plants can be outfitted with media as an alternative to plant …
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Correlation of biochemical oxygen demand with oxidation-reduction potential of settled sewage
… the samples was the effluent end of the primary clarifier at the V.P.I. Sewage Disposal Plant. The investigation consisted essentially of performing the standard biochemical oxygen demand determination and the oxidation-reduction potential determination on similar sewage samples. The data …
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Investigation of the Effects of Sequential Anaerobic, Anoxic and Aerobic Zones on Dissolved Oxygen Transfer Parameters in a biological Nutrient Removal Pilot Plant
… pilot plant. Effluent from a full scale primary clarifier, used as pilot plant influent, was found to have an alpha (ratio of process to clean water K<sub>L</sub>a) of 0.71 as determined in a 21 liter bench scale reactor and an alpha of 0.332 as determined in a 0.45 m³ aeration basin of the 2.4 …
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The influence of denitrification in clarifiers on biological phosphorus removal at CCSD plant
… about denitrification occurring in secondary clarifiers. In this study an attempt was made to study denitrification occurring within a secondary clarifier at the Clark County Sanitation District (CCSD) wastewater treatment plant, Las Vegas. The results obtained from this study showed that …
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Biofiltration for Control of H2S from Wastewater Treatment Plant Gases
… sulfide generated in the headworks and a primary clarifier of a local Wastewater Treatment Plant. The contaminated gas stream is distributed upward through 1,718 m3 of filter material. With a flow rate varying between 3,503.0 m3/h and 4,587.3 m3/h and hydrogen sulfide inlet concentrations between …
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Modeling effects of U-tube aeration in recirculating aquaculture systems
… system components; production tank, multi-tube clarifier, rotating biological contactor and the u-tube. The calibrated model predicted equilibrium oxygen concentrations in the production tank to within ± 1 mg/L in the validation tests. The model was then used to investigate techniques to reduce …
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La tension de "l'immédiateté médiatisée" des expériences chrétiennes de Dieu proposition d'une grille d'analyse à partir de l'oeuvre christologique de Bernard Sesboué
… sont élaborées et proposées pour exposer, clarifier et articuler théologiquement le nécessaire paradoxe de l'immédiateté médiatisée des expériences chrétiennes de Dieu. La démarche méthodologique alors mise en oeuvre s'appuie sur la réflexion christologique de Bernard Sesboüé, bonifiée par …
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Phosphorus removal mechanisms at the Yellow River Sweetwater Creek Water Reclamation Facility, Gwinnett County, Georgia.
… BPR appears to be occurring with the secondary clarifier sludge blanket and return to compartment A of the nitrification basin.
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Water chemistry characterization and component performance of a recirculating aquaculture system producing hybrid striped bass
… analysis was done for both the multi-tube solids clarifier and rotating biological contactor (RBC). Water chemistry and water quality analysis included dissolved oxygen (DO), alkalinity, ions, carbonaceous biochemical oxygen demand (CBODS), chemical oxygen demand (COD), dissolved organic carbon …
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PARTICLE REMOVAL IN FLOC BLANKET CLARIFIERS VIA INTERNAL FLOW THROUGH POROUS FRACTAL AGGREGATES
… of primary particle removal in floc blanket clarifiers was characterized via size-based performance curves obtained from light blocking particle counters that measured the effluent of a laboratory-scale floc blanket clarifier treating synthetic raw water. Particle capture was first order with …
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