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Showing 1 to 20 of 22 for “"hollow fiber membrane"”.
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Hollow fiber membrane-based air gap membrane distillation
Membrane Distillation (MD) is a thermally-driven separation process. In this research, desalination of 1 % NaCl solution is achieved by one type of MD namely, Air Gap Membrane Distillation (AGMD). The characteristics of AGMD are evaluated by using a hollow-fiber-set-based compact device. Hot brine …
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Engineering polymeric hollow fiber membrane reactors for sustainable chemical transformation reactions
… relations of a new catalytic membrane reactor platform for conducting catalytic reactions in a continuous-flow fashion. More specifically, it focuses on permanent immobilization/impregnation of organic or metal nanoparticle catalysts by covalent bonding within highly …
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Partial nitrification and oxygen transfer analysis utilizing hollow fiber membrane aeration
… system to provide the necessary substrates.y A hollow fiber membrane reactor was employed to create this partial nitrification system.y Gas mass transfer was first evaluated to determine the K<sub>L</sub>a oxygen transfer coefficient. Reactor parameters, such as mixing speed, membrane length, …
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Treatment of High-Strength Nitrogen Wasetewater With a Hollow-Fiber Membrane-Aerated Biofilm Reactor: A Comprehensive Evaluation
… the capability of one such technology, a hollow-fiber membrane-aerated biofilm reactor (HFMBR), to achieve completely autotrophic nitrogen removal from a wastewater with high nitrogen content. Because the extent of oxygenation is a key parameter for controlling the metabolic processes that …
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Mathematical Modeling for Nitrogen Removal via a Nitritation: Anaerobic Ammonium Oxidation-Coupled Biofilm in a Hollow Fiber Membrane Bioreactor and a Rotating Biological Contactor
… (anammox)-coupled biofilm in a counter-diffusion hollow fiber membrane bioreactor (HFMBR) and a nitritation: anammox-coupled biofilm in a co-diffusion rotating biological contactor (RBC) were developed and implemented using AQUASIM. Four different start-up scenarios on the nitritation: …
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Design and utilization of chiral selectors for enantioselective membrane transport
… the suitability of a selector for use in hollow-fiber membrane systems. Several chromatographically developed selectors show promise for large scale separation of enantiomers using hollow-fiber membrane technology. Chiral selectors derived from N-(1-naphthyl)leucine have been used in a …
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A novel membrane process for autotrophic denitrification
<p>This research focused on the novel use of hollow fiber membranes for gas delivery in biological dentrification using hydrogen-oxidizing bacteria. Autotrophic denitrification is a biological process that reduces nitrate to nitrogen gas using an inorganic carbon source. Hydrogen gas is an electron …
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Process Engineering Characteristics of the Hollow Fiber Ultrafiltration of Skimmilk
… of skimmilk was studied using a pilot-scale hollow fiber membrane unit. The independent variables were transmembrane pressure, flow rate, temperature and feed concentration and the major measured variable was permeate flux (J). Physical properties such as density, viscosity and protein …
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Studies on improved integrated membrane-based chromatographic process for bioseparation
… directly from a fermentation broth, a novel membrane filtration-cum-chromatography device configuration having a relatively impermeable coated zone near the hollow fiber module outlet has been developed. The integrated membrane filtration-cum-chromatography unit packed with chromatographic …
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STUDIES ON THE REACTION OF HIGH-DOSE HYDROXOCOBALAMIN AND ASCORBIC ACID WITH CARBON MONOXIDE: IMPLICATIONS FOR TREATMENT OF CARBON MONOXIDE POISONING
… We used a closed-loop circulation system with a hollow-fiber membrane oxygenator to produce carboxyhemoglobin. Using sensitive gas monitoring equipment to the gas-out port of the oxygenator we analyzed the CO and CO2 concentrations coming from the oxygenator. The mixture of hydroxocobalamin and …
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Comparison of the growth and monoclonal antibody production of suspended mammalian cells in three perfusion systems
… and three perfusion systems: the stirred ceramic membrane reactor (SCMR), the alternating tangential flow (ATF) hollow fiber membrane system, and the external spin filter (ESF) system. The batch experiments for each cell line were used as base case scenarios for the comparisons of cell growth and …
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Fundamental study of hydrophobic microporous membrane contactors for the recovery of insoluble oil from oil-water mixtures
… work was to advance the understanding of a membrane contactor process for the recovery of insoluble oil from water. The hydrophobic hollow fiber membrane had been successfully tested in our laboratories for oil recovery from algae slurries. However, a thorough study to understand the …
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Electrochemical Routes for Capture and Utilization of CO2
… CO2 capture and release platform combining a hollow-fiber membrane contactor with electrodialysis under a moisture-swing mechanism achieved stable operation at 0.4% CO2 feed with high flux and reduced energy demand. This framework was further extended to a continuous, closed-loop system that …
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Characterisation of fouling behaviour with direct observation technique for membrane bioreactor applications
To date, membrane fouling characterisation has been most commonly assessed via hydraulic performances and rarely by visualisation techniques. However, fouling visualisation can provide more detailed characterisation on the morphological structure of the material deposition on the membrane surface. …
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An integrated membrane-based chromatographic process for biomolecule isolation and purification
… process integrating a commercially available hollow fiber ultrafiltration (UF) cartridge and chromatographic resin beads was developed to reduce the number of devices and steps in bioseparation. This device consisted of ion exchange beads carefully packed on the shell side of a hollow fiber UF …
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Sugarcane green ceramic hollow fibre membrane for oily wastewater separation
… work describes the preparation of green ceramic hollow fiber membranes derived from waste sugarcane bagasse ash (WSBA) using phase inversion and sintering techniques. The first step in the production of WSBA was the calcination process of sugarcane bagasse at 800 °C followed by characterization …
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Evaluation of membrane filtration for treatment of black liquor in small-scale pulp and paper mills in India
… products as raw material to produce brown paper. Membrane ultrafiltration treatment has been advocated by many scholars as a possible alternative treatment method for black liquor, and this study attempts to address industrial concerns on the cost-effectiveness of membranes for black liquor …
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Cloth Filter for Disaster Relief Water Treatment
… of the waterbag uses an effective but expensive hollow-fiber membrane microfilter (>$10 each). This cost will likely decrease the use of the waterbag by relief organizations responding to large disasters. The goal of the present thesis research was to develop a novel, low cost (~$5), effective, …
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Development of micro-scale and automated membrane extraction systems for water analysis
… continuous, on-line analysis are also important. Membrane extraction can address both these needs, because it can be carried out in a continuous fashion and can also be miniaturized. This research addresses these two aspects of membrane extraction for the next generation of sample preparation. …
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Mechanism study of virus removal in membrane filtration and the application to improve virus removal
… of virus infection without sufficient removal. Membrane bioreactor (MBR) has shown its promise to remove virus in municipal wastewater treatment, but the major concern is the trade-off between the water permeate flux and the virus removal efficiency. The objective of this study is to understand …
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