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 35 for “"moving-bed"”.
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Constrained multi-objective Bayesian optimization of simulated moving bed chromatography
Simulated moving bed chromatography (SMB) is a continuous counterpart to conventional batch reverse phase chromatography. SMB is a multi-column system and uses counter-current movement of the liquid and solid phases to achieve high-resolution separations. While SMB offers significant performance …
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Startup Strategies for Mainstream Anammox in Moving Bed Biofilm Reactors (MBBRs)
… for mainstream PdNA without AMX inoculation in moving bed biofilm reactors (MBBRs) with two simultaneous experiments. In one experiment, an MBBR was started using IFAS carriers with a preliminary biofilm and no external carbon dosing or AMX biomass inoculation. The feed was controlled to 20°C …
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A sponge-based moving bed bioreactor for micropollutant removal from municipal wastewater
… hormones, industrial chemicals and pesticides. A moving bed-submerged membrane bioreactor (MB-SMBR) was also evaluated in terms of micropollutant removal and membrane fouling. During the batch experiments, non-acclimatized (virgin) sponge showed significant and rapid sorption of hydrophobic …
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Convective Heat Transfer in a Moving Bed with Special Reference to Melting
… melting of metals or organic solids in packed beds in the accepted manner of heat transfer factor or Nusselt number against Reynolds number. it was recognised that melting in a tower furnace was restricted to a short zone at the bottom so, to simplify the problem, Akers (2) simulated the upper …
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Evaluation of Alternative Electron Donors for Denitifying Moving Bed Biofilm Reactors (MBBRs)
Moving bed biofilm reactors (MBBRs) have been used effectively to reach low nutrient levels in northern Europe for nearly 20 years at cold temperatures. A relatively new technology to the US, the MBBR has most typically been used in a post-denitrification configuration with methanol for additional …
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Simulation and Comparison of Operational Modes in Simulated Moving Bed Chromatography and Gas-Phase Adsorptive Separation
… and comparison of operational modes in simulated moving bed (SMB) chromatography for separation and purification in bioprocesses. The second part includes the simulation of gas-phase adsorptive processes by pressure swing adsorption and temperature swing adsorption technologies. The applications …
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A study of zinc separation from an alkaline leach liquor using fixed and moving bed ion exchange systems
… solutions.<br/><br/>Work concerning fixed and moving bed processes was done to determine various design parameters such as mass transfer coefficients, zone height, number and height of transfer units.<br/><br/>The kinetics of ion exchange was studied through fixed bed operation by obtaining …
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Design of Mixed-Solvent Extraction and Size-Exclusion Simulated Moving Bed Chromatography to Recover Valuable Compounds from Electronic Waste
More than one million tons of polycarbonates and over 500,000 tons of flame retardants are consigned to landfills each year in the form of waste electrical and electronic equipment. Electronic waste is the fasting growing waste steam at a rate of 3-5% per year. Two separation processes are …
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Design, fabrication, operation and Aspen simulation of oil shale pyrolysis and biomass gasification process using a moving bed downdraft reactor
"Energy is the major facilitator of the modern life. Every developed and developing economy requires access to advanced sources of energy to support its growth and prosperity. Declining worldwide crude oil reserves and increasing energy needs has focused attention on developing existing …
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THE EFFECT OF BIOFILM CARRIER LENGTH ON NITRIFICATION IN MOVING BED BIOFILM REACTORS: AN EXAMINATION OF MIXING INTENSITY, SHOCK LOADINGS, AND PH CHANGES
… integrated fixed film activated sludg (IFAS) and moving bed bioreactors (MBBRs) are commonly used in wastewater treatment, but little is known about how media geometry affects the biofilms and process performance. The objective of this study was to compare nitrification and growth of biofilms …
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Evaluating Biological Treatment Systems: (i) Moving Bed Biofilm Reactor versus Biological Aerated Filtration, and (ii) Sulfide-Induced corrosion in Anaerobic Digester Gas Piping
… Section I involved the performance of a moving bed biofilm reactor (MBBR) versus a biological aerated filtration (BAF) and Section II involved study on causes of deposition in anaerobic digester gas piping. The first section evaluated and compared the performance of a laboratory-scale …
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The determination of heat transfer characteristics for the improved design of a heat exchanger for a moving bed system composed of air and activated carbon
… The hypersorption process consists of a moving bed of an adsorbent passing counter currently to the gaseous flow. The gases are separated by selective adsorption. Of basic importance for successful operation is the heating of the adsorbent to obtain desorption. Considerable difficulty in …
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Bioaugmentation and Retention of Anammox Granules to a Mainstream Deammonification Bio-Oxidation Pilot with a Post Polishing Anoxic Partial Denitrification/Anammox Moving Bed Biofilm Reactor
… anoxic partial denitrification anammox (PdN/A) moving bed biofilm reactor (MBBR) testing glycerol, acetate, and methanol as carbon sources to maximize total inorganic nitrogen (TIN) removal through the anammox pathway and to minimize effluent TIN. A carbon feeding strategy was developed and was …
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A study of the modes of gas-solids flow in pipelines
… modes: i. suspension flow; ii. non-suspension moving-bed type flow; iii. non-suspension plug type flow. The modes of flow that a bulk material can achieve are dependent upon its particle and bulk properties as well as the pipeline conditions. This work describes the development of mathematical …
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The influence of bulk particulate properties on pneumatic conveying performance
… flow. For products capable of dense phase in a moving bed type flow regime, a further correlation is proposed which predicts the likely conveying performance in the pipeline in terms of mass throughput of product for given conditions based on the air retention characteristics of a product. The …
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Development of Computational Tools for the Design, Simulation and Optimization of Cyclic Steady State (CSS) Adsorption and Chromatographic Processes
… separation process known as Simulated Moving Bed (SMB) chromatography. The first aspect is system design, and the second is improving computer simulations to generate heuristics for choosing operational modes. For the past 15-20 years, there has been a surge of interest in the use of …
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Experimentelle und mathematische Modellierung der Festbettvergasung am Beispiel der Gleichstromvergasung von Holzhackschnitzeln
… about experimental and mathematical modelling of moving-bed-gasification was to increase the transparency of the process. At Dresden University of Technology a gasifier with a high number of measuring points was used. Two-dimensional profiles of temperature and gas-concentrations were analysed. …
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Development of a Multi-Component Competitive Adsorption Model for GAC Systems and Application to Improve Hybrid Sorption -Membrane Processes
… NOM surface concentration. COMPSORB-GAC uses a moving-grid, finite-difference formulation of the governing equations that makes it possible for the first time to reflect spatial variations in adsorption parameters and to directly simulate counter-current, moving-bed reactors. A parameterization …
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Modeling the coupled effects of heat transfer. thermochemistry, and kinetics during biomass torrefaction
… of two classes of torrefaction reactors (fixed/moving bed and fluidized bed) is made based on simulation results.
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