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Showing 1 to 16 of 16 for “"Oxygen mass transfer"”.
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Oxygen Mass-Transfer in Tower Fermenters
… fermenters and the measurement of the rate of oxygen mass—transfer in such systems using fast-response oxygen electrodes. Consideration has been given to ways of modelling the behaviour of fast-response probes and to the evaluation of mass-transfer coefficients from the results of …
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Development of sediment oxygen demand predictive model by characterization of oxygen mass transfer at sediment-water interface
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-12-01
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Characterization of penicillin production by an immobilized biofilm of Penicillium chrysogenum
… to penicillin production at various sugar and oxygen concentrations by studies using a novel bench scale bioreactor. The biofilm was submerged in aerated liquid media, mounted vertically in a tube and oriented so that the liquid media and sparged gas bubbles flow uniformly over the two slab …
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Venturi aeration of bioreactors
Low solubility of oxygen has resulted in high bioreactor energy requirements in order to supply sufficient oxygen to aerobic bioprocesses. It is desirable to reduce energy consumption in bioreactors to benefit environmental sustainability as well as economic feasibility. This is particularly …
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Computational fluid dynamics modelling of dissolved oxygen in oxidation ditches.
… factors that affect the hydrodynamics, dissolved oxygen (DO) and aeration performance of a wastewater oxidation ditch. The literature is reviewed on the Computational Fluid Dynamics (CFD) modelling of wastewater aeration tanks. This study develops a CFD model of an aerated oxidation ditch, by …
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Transport phenomena at elevated temperatures - studies related to direct polymetallic smelting
… optimum operating conditions. A study of oxygen mass transfer caused by multiple top-blown, subsonic gas jets contacting water flowing in a full-scale channel model of the smelter converting hearth has been carried out. A liquid phase solute mass transfer model that incorporates a flowing …
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Mathematical Modelling of Tower Fermentation Processes
… flow model; (3) a theoretical model describing oxygen mass transfer in bubble columns and tower fermentation systems; (4) a detailed review of deterministic kinetic models for microbial processes; (5) a brief review of continuous culture theory and mathematical descriptions of transient …
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Physical and biological factors affecting oxygen transfer in the activated sludge wastewater treatment process
… on determining 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. …
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Modelling and Simulation of Membrane Bioreactors for Wastewater Treatment
… surface and the effects of MLSS concentration on oxygen mass transfer. Although backwashing is not described in great detail, its effects are represented in the model by resetting the initial condition in the cake deposition equation after each backwash period. The MBR model was implemented in …
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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
… and pilot scale determinations of the volumetric oxygen transfer coefficient, K<sub>L</sub>a, were performed on an improved A²/O biological nutrient removal (BNR) pilot plant. Effluent from a full scale primary clarifier, used as pilot plant influent, was found to have an alpha (ratio of process …
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Diffuser Fouling Mitigation, Wastewater Characteristics And Treatment Technology impact on Aeration Efficiency
… on aeration efficiency which supplies the oxygen needed in the treatment process. The process is a complex heterogeneous mixture of microorganisms, bacteria, particles, colloids, natural organic matter, polymers and cations with varying densities, shapes and sizes. These activated sludge …
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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 …
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Development of a novel bioreactor and systems for suspension cell culture in biopharmaceutical production
… In addition, at a large scale, improper mass transfer impairs the performance of cell lines and achieving high cell densities and prolonged viability with correct glycosylation of a secreted proteins is still a challenge during scale-up. Many cell lines, for example Vero cells, which are …
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A novel semi-passive process for sulphate removal and elemental sulphur recovery centred on a hybrid linear flow channel reactor
… require precise operational control to maintain oxygen limiting conditions for partial oxidation. In the current study a hybrid LFCR, incorporating a FSB with biological sulphate reduction in a single reactor unit, was developed. The integration of the two biological processes in a single LFCR …