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 42 for “"Membrane Processes"”.
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Membrane Processes for Sustainable Energy Applications
… impact on our current lifestyle.</p><p>Membrane processes have gained importance in a wide spectrum of applications due to their low energy requirements. Process technologies for alternative energy production can be intensified with the application of membranes. This dissertation is …
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Assessing Biofiltration Pretreatment for Ultrafiltration Membrane Processes
… and upstream of an ultrafiltration (UF) membrane process was assessed for its treatment effectiveness. The impact of biofiltration pretreatment on UF membrane performance was evaluated holistically by investigating the native source water chemistry and extending the analysis into the …
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The production of clinical dextran using membrane processes
… using batch ultrafiltration. A large number of membranes were tested. The correct BP specification could be achieved using these membranes but there was a significant loss of saleable material. To overcome this problem a four stage ultrafiltration cascade (UFC) was used. This work is the first …
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Development of chemical-free methods of fouling mitigation for membrane processes in desalination
… technologies has never been more pressing. While membrane technology, namely reverse osmosis (RO), currently stands as the most energy efficient desalination technology, it is plagued by fouling undercutting both productivity and permeate quality. To restore performance, desalination plants resort …
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Integrált membránműveletek alkalmazása egészséges félkész termékek előállításában = Using integrated membrane processes for producing healthy semifinish products
A jó minőségű élelmiszeripari termékek előállítását megköveteli a gazdasági verseny. Munkám során egészséges, magas beltartalmi értékekkel rendelkező félkész termékek, sűrítmények gazdaságos előállítását tűztem ki célomul. A kávé sűrítmény előállításához nanoszűrést és fordított ozmózist …
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Development of a Multi-Component Competitive Adsorption Model for GAC Systems and Application to Improve Hybrid Sorption -Membrane Processes
… and treatment capabilities of hybrid sorption-membrane processes. UA-UF consists of an upflow bed of granular adsorption media situated adjacent to a low-pressure membrane system. The downstream membrane allows the adsorbent to operate in a counter-current mode that increases adsorption …
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Designing Magnetically Responsive Ultrafiltration Membranes
<p>Ultrafiltration (UF) membranes developed out of a need for protein separation processes. Currently, they are used in a variety of industries ranging from food manufacturing to pharmaceuticals for two main purposes: concentration, separation, and buffer exchange. UF membrane processes in product …
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Membrane Processing of Ethanol -Extracted Corn Oil
The liquid extract was then concentrated using membrane technology, yielding a fraction that may include protein (zein), lecithins and other potentially high-value fractions soluble in ethanol, in addition to the corn oil. Investigation of the nature and extent of membrane fouling has also been …
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Factors required to enhance water recycling at two major Australian industrial manufacturing sites
… consisting of water audit, pinch analysis and membrane process application, was deployed in series to systematically identify water conservation opportunities. Initially, a water audit was deployed to completely characterize all water streams found at each production site. This led to the …
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Investigación sobre eliminación de sales metálicas por procedimientos avanzados
… de las aguas. ABSTRACT The advanced processes using membranes (microfiltration, ultrafiltration, nanofiltration and reverse osmosis) form a group of adequate and modular technologies, with different energy requirements, that don’t change the characteristics of the substances separated …
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A study on PIP5Kalpha degradation by Nedd4-1-mediated ubiquitination
… (PIP2) is a critical lipid mediator of diverse membrane processes including vesicle trafficking, actin cytoskeleton dynamics and cell signaling at the cell surface, indicating significance of spatiotemporal regulation and underlying mechanism of PIP2 concentration. So far, most studies on PIP2 …
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Multiscale computational modeling of nanofluidic transport
… and purification technologies, such as novel membrane processes and materials, are in great demand to produce clean water from contaminated sources or the sea. However, the lack of fundamental understanding of structure-property-performance has hindered the advancement of these techniques. In …
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Preparation, characterization and carrier gas transport characteristics of inorganic and organic membranes for application in lactic acid esterification with ethanol.
… of the reaction products can be improved using a membrane reactor and when coupled with a heterogeneous catalyst offers an opportunity for process intensification. This thesis investigates the batch process esterification reaction involving lactic acid (LA) and ethanol (EL) in the presence of a …
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Remoção de CO2 do biogás por permeação em membranas
… Taking into account the potential of membrane processes in biogas purification, this work evaluates the performance of two technologies for CO2 removal from biogas: membrane gas permeation and membrane contactors. Both technologies were compared regarding purification efficiency, …
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Genetic Algorithm Based Optimization of Baffle Positions in a Forward Osmosis Draw Channel
<p>Forward Osmosis (FO) driven asymmetric membrane filtration is a developing technology which shows promise for seawater desalination and wastewater treatment. Due to the fact that asymmetric membranes are widely used in conjunction with this technology, internal concentration polarization (ICP), …
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Simple, sustainable, water straight from the sun - batteryless electrodialysis desalination
… efficiency in comparison to other thermal and membrane processes and thus provides significant reduction in solar array capacity; however, it has not been exhibited off-grid without significant energy storage. This work proposes and validates a simple, robust, and maximal water production rate …
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Electrochemical Modulation of Peripheral Nerves Using Ion-Selective Electrodes
… In this thesis, I examine the ion-selective membrane (ISM), a filter that discriminately transports single ions within mixed electrolytes, whose operation in ion delivery platforms does not suffer from the fundamental restriction of finite capacity. Specifically, I discuss the optimal design …
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The use of isothermal membrane distillation in tomato processing
… paste preparation by the use of isothermal membrane distillation (IMD). Traditional vacuum evaporation processes used for tomato paste production operate at high temperatures for long periods and can cause thermal damage to heat sensitive components and loss of volatile flavour and aroma …
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Mixed Gas Transport Study Through Polymeric Membranes: A Novel Technique
… ventures. Industrial applications employing membrane processes range from production of pure gases to barrier coatings for protection against environmental elements. Membrane separations are simple, energy efficient processes, which can be economically competitive with traditional separation …
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