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Showing 1 to 13 of 13 for “"Fouling Mechanisms"”.
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Towards understanding fouling mechanisms in continuous crystallisation processes
Fouling involves the unwanted deposition and build-up of solid material on surfaces within a process. This problem is widely encountered in multiphase and solid phase processing in many industries including oil and gas, pharmaceutical and fine chemical manufacturing sectors.;Although it is …
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Fouling mechanisms in the membrane filtration of single and binary protein solutions
In this study the fouling mechanisms of various microfiltration and ultrafiltration membranes were studied when subjected to crossflow filtration using various protein solutions. Experimentation was carried out using controlled flux experiments and fouling phenomena was investigated via the …
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Fouling of Aluminum Oxide Microfiltration Membranes by Semi-Synthetic Metal Working Fluids
The modeled membrane fouling mechanisms were validated through the reformulation of a semi-synthetic MWF designed to have greater microemulsion stability. It was experimentally verified that the new fluid did not see significant aggregation. Accordingly this fluid did not show evidence of …
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Screening of Microfiltration and Ultrafiltration Ceramic Membranes for Produced Water Treatment and Testing of Different Cleaning Methods
… Hermia’s models were used to investigate the fouling mechanisms involved in all the filtration operations conducted. It was found that the cake layer formation and at a lesser degree the intermediate blocking were the predominant fouling mechanisms which controlled the permeate flux of …
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Characterisation of feed and membrane properties for industrial ultrafiltration management
… impact of feed and membrane characteristics on fouling behaviour in complex feed scenarios. However, this assessment is limited by current understanding of (a) the utility of common foulant characterisation tools for the detection of organic fouling propensity, and (b) the impact of membrane …
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The prediction of flux decline in cross-flow microfilters via three-dimensional fluid dynamic models of tortuous pore structure
… metalworking fluids. However in operation, fouling of the microfilter has been shown to occur and bring about a reduction of microfilter flux. This research develops a fluid dynamic model of the tortuous pore geometry to simulate the progression of fouling and investigate the associated …
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Mechanisms Of Nanofilter Fouling And Treatment Alternatives For Surface Water Supplies
… dissertation addresses the role of individual fouling mechanisms on productivity decline and solute mass transport in nanofiltration (NF) of surface waters. Fouling mechanisms as well as solute mass transport mechanisms and capabilities must be understood if NF of surface waters is to be …
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Mathematical modeling of membrane filtration
… chapter, a new mathematical model for flow and fouling in a pleated membrane filter is presented. Pleated membrane filters are widely used in many applications, and offer significantly better surface area to volume ratios than equal area unpleated membrane filters. However, their filtration …
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Characterization of microporous ECTFE membranes exposed to different liquid media and ?-radiation and nanoparticle microfiltration through such membranes
… of TOA on ECTFE membranes. In dead-end MF, fouling mechanisms behaved differently for virgin and TOA-soaked membranes; filtrate particle size distributions agreed well with estimated pore sizes. The values of permeance (kg/m2-s-kPa) determined from the slope of the linear plot of filtration …
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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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Transverse vibration as a fouling limitation strategy in membrane bioreactors
Membrane fouling is a key factor that significantly contributes to the performance of membrane bioreactors (MBR). Aeration is commonly applied in MBRs to control the rate of fouling. In applications where aeration is not a feasible option, such as in anaerobic membrane bioreactors (AnMBRs), …
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Application of Molybdenum Carbide Catalysts for the CO2-assisted Oxidative Dehydrogenation of Ethane
… surface composition as well as potential fouling mechanisms is highly dependent on the heating rate, gas mixture, final temperature and precursor composition. Various experiments utilizing in situ characterization techniques, such as in situ X-ray diffraction, X-ray adsorption and Raman …
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Anti-fouling interfaces for energy applications
Fouling and accretion have negative impacts on a plethora of industrial processes. This doctoral thesis focuses on the theoretical and experimental exploration of mitigation strategies for heterogeneous nucleation of foulants. The dissertation covers low-temperature precipitation fouling, corrosion …