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 12 of 12 for “"volumetric mass transfer coefficient"”.
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Study on the thermodynamics and kinetics of the stripping of palladium from a typical palladium organic
… effect of impeller speed and type on the overall volumetric mass transfer coefficient. which was the major focus of this thesis.
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Process development and scale-up from shake flask to fermenter of suspended and immobilized aerobic microorganisms
… based on empirical correlations of the volumetric mass transfer coefficient and the pH change of the medium is developed and applied for batch and continuous cultures. Mixing time, gas-liquid mass transfer, the influence of antifoam agent, power input, gas hold-up, productivity, and long …
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Diffuser Fouling Mitigation, Wastewater Characteristics And Treatment Technology impact on Aeration Efficiency
… defined by the OTE, % and alpha. Oxygen transfer efficiency (OTE) is the mass of oxygen transferred into the liquid from the mass of air or oxygen supplied, and is expressed as a percentage (%). OTE is the actual operating efficiency of an aeration system. The alpha Factor (α) is the …
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Physical and biological factors affecting oxygen transfer in the activated sludge wastewater treatment process
… different factors that influence oxygen transfer and consequently its energy demand.</p><p>AS morphology, as described by the d<sub>10</sub>, d<sub>20</sub>, d<sub>32</sub>, specific filament length (SFL), 30 min settleability (SV<sub>30</sub>), etc., does influence the OTE. Filamentous …
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Scale-up and Measurement Enhancements of a BioGenerator Bioreactor
… of accurately measuring dissolved oxygen and volumetric mass transfer coefficient in ferric sulfate broth using microbial biooxidation stoichiometry and electrochemical amplification processes were achieved. Investigation into the direct in-situ measurement of solution pH and iron ion …
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Kinetic and mass transfer studies of ozone degradation of organics in liquid/gas-ozone and liquid/solid-ozone systems.
This work was concerned with the determination of mass transfer and kinetic parameters of ozone reactions with four organic compounds from different families, namely reactive dye RO16, triclocarban, naphthalene and methanol. In order to understand the mechanisms of ozone reactions with the organic …
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Agitation, mixing and mass transfer in simulated high viscosity fermentation broths
Gas-liquid mass transfer, agitator power consumption, rheology, gas-liquid mixing and gas hold-up have been studied in an agitated, sparged vessel of diameter, T = 0.3 m, with a liquid capacity of 0.02 m\(^3\), unaerated liquid height = 0.3 m. The solutions of sodium carboxymethylcellulose used …
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Hydrodynamics and Mass Transfer in Bubble Columns
… need prior knowledge of local hold-up, transport coefficients, and bubble dynamics. This dissertation provides an improved understanding of the key design parameters (gas hold-up, volumetric mass transfer coefficients, gas-liquid interfacial area, and their spatial distribution) for predictive …
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Experimental and kinetic modelling of multicomponent gas/liquid ozone reactions in aqueous phase. Experimental investigation and Matlab modelling of the ozone mass transfer and multicomponent chemical reactions in a well agitatated semi-batch gas/liquid reactor.
… reactions, which occur in the liquid phase, and mass transfer from the gas to the liquid phase. This study focuses on two aspects: mass transfer and chemical reactions in multicomponent systems. The mass transfer parameters were determined by experiments under different conditions and the …
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The effect of aeration and aerator design on the physical, chemical and fertiliser quality of cattle slurry
… litres) and pilot (up to 10, 000 litres) using volumetric mass transfer coefficient, standard oxygen transfer rate and oxygenation efficiency as the testing criteria. The fine bubble diffuser used throughout all the scale up experiments was of the same principle. Air was delivered through a …
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Experimental and kinetic modelling of multicomponent gas/liquid ozone reactions in aqueous phase. Experimental investigation and Matlab modelling of the ozone mass transfer and multicomponent chemical reactions in a well agitatated semi-batch gas/liquid reactor.
… reactions, which occur in the liquid phase, and mass transfer from the gas to the liquid phase. This study focuses on two aspects: mass transfer and chemical reactions in multicomponent systems. The mass transfer parameters were determined by experiments under different conditions and the …
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Towards value from waste: Bioreactor selection for the reduction of nutrient load and production of Poly-y-glutamic acid
… that could be seen in a WWBR. The biomass productivity and maximum specific growth rates were estimated. Fed-batch room temperature cultivation was used to investigate if the biomass and PGA productivities could be maintained over extended time by feeding at the maximum …