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Dissertations / Theses on the topic 'Membrane filtration'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Krupp, Armin Ulrich. "Mathematical modelling of membrane filtration." Thesis, University of Oxford, 2017. http://ora.ox.ac.uk/objects/uuid:ae6dd9e4-a862-4476-a8d9-35156848297f.

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In this thesis, we consider four different problems in membrane filtration, using a different mathematical approach in each instance. We account for the fluid-driven deformation of a filtercake using nonlinear poroelasticity in Chapter 2. By considering feeds with very high and very low particle concentrations, we introduce a quasi-static caking model that provides a suitable approximation to the full model for the physically realistic concentration regimes. We illustrate the agreements and differences between our model and the existing conventional cake-filtration law. In Chapter 3, we introd

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2

Mayor, Russell. "Some problems in filtration." Thesis, University of Oxford, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320650.

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3

Mignard, Dimitri. "Mass transport studies in membrane filtration." Thesis, University of Edinburgh, 1998. http://hdl.handle.net/1842/12654.

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First, a programme to model concentration polarisation was written using the finite difference approach developed by Ilias and Govind. It was validated with experiments using Centrisystem C-300 and C-400 cartridges and BSA solutions (1-5 g/L), and experimental data from Yeh and Cheng with an H1P30-20 Amicon cartridge and Dextran T-500. The next step was to incorporate fouling into this model. To calculate the configurational Derjaguin-Landau-Vervey-Overbeek (DLVO) forces and the resulting osmotic pressures, large use was made of the work of Bowen <I>et al</I>. Concentration dependent diffusivi

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4

Ye, Yun School of Chemical Engineering &amp Industrial Chemistry UNSW. "Macromolecular fouling during membrane filtration of complex fluids." Awarded by:University of New South Wales. School of Chemical Engineering and Industrial Chemistry, 2005. http://handle.unsw.edu.au/1959.4/33245.

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Macromolecular components, including protein and polysaccharides, are viewed as one type of major foulants in the complex feed membrane filtration systems such as membrane bioreactor (MBR). In this thesis, the mechanisms of macromolecular fouling including protein and polysaccharide in the complex feed solution are explored by using Bovine serum albumin (BSA) and alginate as model solution. During the filtration of BSA and washed yeast with 0.22 ????m PVDF membrane, it was found that the critical flux of mixture solution was controlled by washed yeast concentration while the existence of BSA s

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5

Dragosavac, Marijana M. "Membrane emulsification and filtration for engineered particles." Thesis, Loughborough University, 2011. https://dspace.lboro.ac.uk/2134/8980.

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In many applications employing particles, the distribution of particle sizes has significant influence on the properties of the resultant material. Membrane emulsification (ME) is a method for manufacturing uniformly sized emulsion droplets where a dispersed phase is forced through a membrane into the continuous phase. It is the shear applied on the membrane surface that detaches the droplets thereby generating an emulsion. Formulation of the dispersed and the continuous phase influences the final droplet size of the emulsion. Therefore one of the aims of this research is to broaden the existi

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6

Ofsthun, Norma Jean. "Cross-flow membrane filtration of cell suspensions." Thesis, Massachusetts Institute of Technology, 1989. http://hdl.handle.net/1721.1/14481.

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7

Siddiqui, Farrukh Arsalan. "Membrane filtration : fouling and cleaning in forward osmosis, reverse osmosis, and ultrafiltration membranes." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:bcaadfaa-62fb-4910-8218-bff387a19a11.

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A comparison of fouling in osmotically driven processes with that in pressure driven processes is the main focus of the thesis. Forward osmosis (FO) and reverse osmosis (RO) have received considerable attention for water treatment and seawater desalination. This research compared the nature of fouling in FO mode with that in RO starting with the same initial flux in connection with cleaning effects and then comparing to those in ultrafiltration membranes. In all cases, with cleaning as an integral part, the extent of fouling reversibility, and the question whether a critical flux could be dete

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8

Kyllönen, Hanna. "Electrically or ultrasonically enhanced membrane filtration of wastewater /." Espoo [Finland] : VTT Technical Research Centre of Finland, 2005. http://www.vtt.fi/inf/pdf/publications/2005/P576.pdf.

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9

Machenbach, Ingo. "Drinking Water Production by Coagulation and Membrane Filtration." Doctoral thesis, Norwegian University of Science and Technology, Department of Hydraulic and Environmental Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-2142.

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<p>Drinking water production with low-pressure hollow-fibre membranes is becoming increasingly more widespread as replacement for conventional separation technology. Upstream coagulation can mitigate fouling layer formation on membranes and allows removal of colloidal and soluble compounds smaller than the membrane pores. However, integrating membrane systems with coagulation bears the risk of impaired system performance due to unfavourable aggregate characteristics. This is of particular importance when treating humic substances due to their strong dependence on the solution environment.</p>

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10

Taha, Taha. "CFD modelling of slug flow enhanced membrane filtration." Thesis, University of Oxford, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403424.

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11

Neale, Peta Anne. "Influence of solute-solute interactions on membrane filtration." Thesis, University of Edinburgh, 2009. http://hdl.handle.net/1842/4106.

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An understanding of solute-solute interactions is essential for aquatic systems as this can affect the fate and behaviour of micropollutants in the environment and engineered systems. Despite the importance of solute-solute interactions there is a general lack of understanding which may be attributed to the fact that many engineering models overlook solute-solute interactions and that the quantification of such interactions is inherently difficult. When solute-solute interactions are considered, they are often studied at unrepresentative concentrations and do not consider the influence of orga

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12

Moslehi, Ehsan. "Integrating membrane filtration forwater reuse in tissue mill." Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231741.

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Water is an essential and indispensable component is the pulp- and paper production industry.The increase in energy costs, stricter environmental regulations and water resource shortageshave caused a reduction of the water footprint in the industry as well as an increase in waterrecycling and water circuit closure. Reducing water usage requires an understanding of wherecontaminants originate, as well as which streams are critical to the process and how they impactmill operation. The recirculation of water can cause contaminant accumulation; therefore millsemploy technologies for water treatmen

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13

Chateauneuf-Randon, Sixtine de. "Membranes d'hydrogel pour une filtration sélective." Electronic Thesis or Diss., Sorbonne université, 2024. http://www.theses.fr/2024SORUS255.

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Les hydrogels sont des matériaux polymères hydrophiles qui retiennent de grandes quantités d’eau tout en conservant une structure tridimensionnelle, ce qui les rend adaptés à des applications biomédicales et de filtration. Ce manuscrit se concentre sur les membranes d’hydrogels fabriquées à partir de polyéthylène glycol diacrylate (PEGDA) réticulé par UV en présence de chaînes de polyéthylène glycol (PEG) et d’un photoamorceur. Les membranes PEGDA/PEG sont sélectionnées pour leur robustesse mécanique et leur perméabilité élevée qui peut être ajustée en fonction de la concentration et de la mas

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14

Decock, Jérémy. "Approches micro/milli-fluidiques pour l'étude in situ de procédés de filtration frontale." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0788.

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Ce travail de thèse porte sur le développement technologique d’outils miniaturisés micro- (10 µm) et milli- (1 mm) fluidique, pour l’étude in situ de procédés de filtration frontale, en collaboration avec l’entreprise Solvay. Les outils développés permettent le suivi visuel de la formation de gâteaux de filtration en opérant des essais à pression ou à débit constant sur diverses suspensions colloïdales, jusqu’à des pressions trans-membranaires de l’ordre de 7 bars.L’étude millifluidique de la filtration de dispersions industrielles de silice colloïdale (Solvay, Silica), a permis de mettre en é

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15

Durif, Charlotte. "Elaboration de membranes non-oxydes de type SiBC pour la maîtrise de la contamination dans les réacteurs à eau pressurisée." Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTT179/document.

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Ce travail de thèse a porté sur le développement de membranes céramiques pour la filtration de colloïdes issus de la corrosion dans le circuit primaire des REP. La voie des polymères précéramiques a été mise en œuvre par la synthèse d’un polyborocarbosilane (PBC) à partir d’allylhydridopolycarbosilane conduisant à une céramique de type SiBC. Des billes de PMMA mono disperses d’une taille de 1,5 et 0,3 µm ont été préparées pour servir d’agent porogène pour créer une porosité contrôlée. Des objets micro-cellulaires 3D de forme circulaire ont été élaborés par pressage uni-axial avec ajout de bill

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16

Wu, Nan. "Filtration de nanoparticules par procédés membranaires." Ecole centrale de Marseille, 2013. http://www.theses.fr/2013ECDM0017.

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17

Tomietto, Pacôme. "Contribution des polyhydroxyalcanoates (PHA) dans l'élaboration de matériaux membranaires pour des séparations en phase liquide." Thesis, Rennes 1, 2020. http://www.theses.fr/2020REN1S034.

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Les procédés membranaires sont aujourd'hui largement utilisés dans différents secteurs d'application, comme le traitement de l'eau ou les industries pharmaceutique et agroalimentaire. En comparaison aux autres technologies de séparation, la filtration membranaire a l'avantage d'être économe en énergie, de ne pas nécessiter l'utilisation de produits chimiques supplémentaires et d'être facilement mise à l'échelle du procédé. Cependant, les procédés d'inversion de phase, couramment utilisés pour la fabrication de membranes polymères, sont souvent nocifs pour l'environnement. En effet, ils utilise

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18

So, Wing Kin. "Development of low-cost membrane module for direct sewage filtration /." View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202007%20SO.

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19

Unlu, Meltem. "Indigo Dyeing Wastewater Treatment By The Membrane Based Filtration Process." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609464/index.pdf.

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In the present study, the recovery of the indigo dyeing rinsing wastewater originating from a denim textile mill to the degree of reuse quality, which generally requires nanofiltration (NF), was investigated. In order to control flux decline and hence to maintain an efficient NF<br>coagulation, microfiltration (MF) and sequential MF plus ultrafiltration (UF) pretreatment process alternatives were tested. All pretreatment alternatives were optimized to reduce chemical oxygen demand (COD) and color load to NF. Coagulation process was investigated using the coagulants, aluminum sulfate (Al2(SO4)3

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20

Moore, Kenneth. "Treatment of Arsenic Contaminated Groundwater using Oxidation and Membrane Filtration." Thesis, University of Waterloo, 2005. http://hdl.handle.net/10012/866.

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Arsenic is a known carcinogen, causing cancers of the skin, lungs, bladder and kidney. Current research suggests that drinking water is the most common pathway for long-term low dose exposure. Arsenic contaminated drinking water has caused serious health problems in many countries including: India, Bangladesh, Argentina, Chile, Taiwan, the United States and Canada. Nanofiltration (NF) is a promising technology for arsenic removal since it requires less energy than traditional reverse osmosis membranes. Several studies have shown that nanofiltration is capable of removing the oxi

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21

Kovalsky, Peter Chemical Sciences &amp Engineering Faculty of Engineering UNSW. "Characterisation of fouling behaviour on membrane filtration of aggregated suspensions." Publisher:University of New South Wales. Chemical Sciences & Engineering, 2008. http://handle.unsw.edu.au/1959.4/41531.

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It is widely accepted that flocculation improves filtration performance by increasing cake permeability. This principle is important in submerged membrane filtration for drinking water applications where the feed material can potentially contain fouling components which prohibit the extended operation of the filter. Less well understood is the impact of floc properties on the hydraulic properties of the fouling layer formed on the membrane or the impact of hydrodynamic conditions during treatment on the floc-fouling layer relationship. In order to advance knowledge of this area, a set of tools

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22

Busca, Gerald Thierry Michel. "Treatment of semi-synthetic metalworking fluids : membrane filtration and bioremediation." Thesis, University of Nottingham, 2004. http://eprints.nottingham.ac.uk/10239/.

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Waste engineering fluids, such as coolants and cutting fluids, are difficult to treat because they have variable physical natures, are particularly toxic and have a very high Chemical Oxygen Demand. The complex and unknown chemical content of the many different products available is also problematic. Current technologies, such as nanofiltration or chemical treatment, are quite effective at reducing the COD of the waste metalworking fluids before disposal. These technologies remove free or emulsified oil and high molecular weight components, but they have their limitations. In addition, the mor

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23

Paolini, Fabrizio Dario Re de. "Development of a membrane filtration process for oil/water separation." Thesis, University of Surrey, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301099.

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24

Nagappan, Subbiah Nagappan. "Waste stream reclamation for food manufacturing operations using membrane filtration." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1530804776915171.

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25

Habibi, Sepideh. "Caractérisation multi-échelles d'un système de filtration en présence d'un biofilm." Thesis, Châtenay-Malabry, Ecole centrale de Paris, 2014. http://www.theses.fr/2014ECAP0042/document.

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Dans un procédé de filtration, un fluide traverse une membrane (barrière sélective). Une force motrice s’applique entre les deux côtés de la membrane qui peut être un gradient de pression, température ou un potentiel électrique/chimique. Dans les procédés de filtration par un gradient de pression, certains composés du milieu fluide, traversent la membrane alors que d’autres sont retenues sur la surface membranaire. Ces procédés sont très utiles dans différents domaines de l’industrie, notamment en ce qui concerne le traitement des eaux et des effluents, biotechnologie, agroalimentaire et pharm

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26

Fonseca, Anabela Duarte. "Denitrification in Membrane Bioreactors." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/35212.

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Three membrane bioreactors, a low flux filter (LFF), a diafilter (DF), and an ion-exchange (IE) membrane bioreactor were used to treat water polluted with 50 ppm-N nitrate. The three systems were compared in terms of removal efficiency of nitrate, operational complexity, and overall quality of the treated water. In the low flux filter (LFF) membrane bioreactor an hemo-dialysis hollow fiber module was used and operated continuously for 29 days with a constant flux of permeate. The performance of the system was constant during the span of the experiment, which demonstrated that when the module

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27

Rane, Mahendra. "Porous Membrane." Doctoral thesis, Universitätsbibliothek Chemnitz, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-201000336.

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Membrane processes can cover a wide range of separation problems [with a specific membrane (membrane structure) required for every problem]. Thus, there are membranes available that differ in their structure and consequently in the functionality. Therefore membrane characterization is necessary to ascertain, which membrane may be used for a certain separation. Membranes of pore size ranging from 100nm to 1μm with a uniform pore size are very important in membrane technology. An optimum performance is achieved when the membrane is as thin as possible having a uniform pore size. Here in this the

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Regula, Camille. "Etude du vieillissement des membranes dans le domaine de l’agroalimentaire : production d’eau potable et filtration du lait." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM4313.

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Quel que soit le domaine d'application, les membranes doivent fréquemment subir des procédures de nettoyage et/ou de désinfection afin d'éliminer le colmatage qui découle de la filtration. Ces nettoyages sont responsables d'une accélération du vieillissement des matériaux qui impacte directement les performances techniques et économiques des procédés membranaires. La pérennité de ces derniers passe par l'identification des principaux facteurs responsables du vieillissement et par la compréhension des mécanismes qui le régissent. Le vieillissement statique de membranes d'ultrafiltration spiralé

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Abdullah, Syed Zaki. "Investigation of effect of dynamic operational conditions on membrane fouling in a membrane enhanced biological phosphorus removal process." Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/264.

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The membrane bioreactor (MBR) is becoming increasingly popular for wastewater treatment, mainly due to its capability of producing high quality effluent with a relatively small footprint. However, high plant maintenance and operating costs due to membrane fouling limit the wide spread application of MBRs. Membrane fouling generally depends on the interactions between the membrane and, the activated sludge mixed liquor, which in turn, are affected by the chosen operating conditions. The present research study aimed to explore the process performance and membrane fouling in the membrane enhanced

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Abdullah, Syed. "Investigation of effect of dynamic operational conditions on membrane fouling in a membrane enhanced biological phosphorus removal process." Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/264.

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The membrane bioreactor (MBR) is becoming increasingly popular for wastewater treatment, mainly due to its capability of producing high quality effluent with a relatively small footprint. However, high plant maintenance and operating costs due to membrane fouling limit the wide spread application of MBRs. Membrane fouling generally depends on the interactions between the membrane and, the activated sludge mixed liquor, which in turn, are affected by the chosen operating conditions. The present research study aimed to explore the process performance and membrane fouling in the membrane enhanced

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31

Postlethwaite, Johnathan. "Vibrating membrane filtration : microfiltration performance during the processing of biological feedstreems." Thesis, University College London (University of London), 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.407601.

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32

Sanches, Sandra. "Integration of Membrane Filtration and Photolysis Processes for Drinking Water Treatment." Doctoral thesis, Universidade Nova de Lisboa. Instituto de Tecnologia Química e Biológica, 2013. http://hdl.handle.net/10362/12031.

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Dissertation presented to obtain the Ph.D degree in Engineering and Technology Sciences, Chemical Engineering.<br>Water is a fundamental resource for life. The presence of hazardous micropollutants such as pesticides and hormones in drinking water sources as well as the evidence of their presence in several treated waters raised concerns regarding the quality of the water intended for human consumption. The development of new technologies which are able to cope with these micropollutants and ensure the fulfillment of future more stringent regulations is therefore needed. Low pressure ultr

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Voittonen, Sandra. "Minimization of Fouling for Treatment of Municipal Wastewater with Membrane Filtration." Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-235946.

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In this thesis project, treatment of municipal wastewater using ultrafiltration is evaluated to investigate ways to prevent or minimize fouling from occurring. The aim of this project is to examine which factors play a significant role in causing different types of fouling, in order to minimize the resulting effect and thereby increase the efficiency and lifetime of the membrane. The project started with a broad literature study, which researched which methods are currently used to treat wastewater on an industrial level and other state-of-the-art solutions that are available. This was then us

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Walker, Steven. "Hollow Fiber Ultrafiltration of Ottawa River Water: Impact of Different Pre-treatment Schemes." Thesis, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31323.

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To minimize membrane fouling many water treatment plants pre-treat water prior to microfiltration (MF) or ultrafiltration (UF). Coagulation/flocculation/sedimentation is a common form of pre-treatment, but little research has been conducted on floatation as a part of the pre-treatment. The objective of this thesis is to compare pre-treatment with floatation and with sedimentation for Ottawa River water, a typical Northern Canadian water with a high natural organic matter (NOM) content and a large hydrophobic (HPO) NOM fraction. Fouling tests consisted of multiple filtration/backwashing cycles

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Li, Hong-yu Graduate School of Biomedical Engineering Faculty of Engineering UNSW. "Mechanism studies for crossflow microfiltration with pulsatile flow." Awarded by:University of New South Wales. Graduate School of Biomedical Engineering, 1995. http://handle.unsw.edu.au/1959.4/17858.

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The mechanism of how pulsatile flow affects flux behaviour in crossflow micro-filtration was investigated. The effects of pulsatile flow were sub-divided into shear effects and backflushing effects. A servo-valve hydraulic piston pump was applied to generate pulsatile flows in the membrane module with particular waveforms. Four types of fluid pulsation with specific flow-rate and pressure waveforms were produced for experimental tests. Two parameters, /dVcf\dt/ maxand Pmin, were examined independently for their effect during pulsatile flow, which was estimated by comparing the cake resistance

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Hadj, Said Aissa. "Etude des phénomènes limitant la clarification des jus de fruits par microfiltration tangentielle : application au jus de pommes." Toulouse, INPT, 1989. http://www.theses.fr/1989INPT019G.

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Les techniques a membranes se developpent rapidement dans les industries agro-alimentaires. Apres l'industrie laitiere qui constitue actuellement le principal secteur d'applications, le secteur des boissons est de plus en plus concerne par ces nouvelles techniques pour la clarification ou la concentration. Lors de la clarification des jus de pommes par microfiltration tangentielle, le phenomene limitant est lie essentiellement a la presence d'une fraction colloidale (notamment des pectines). L'etude systematique de la microfiltration tangentielle sur membrane organique de solutions de pectine

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Negrel, Jean-Luc. "Membrane protéique de nanofiltration : élaboration, caractérisation et propriétés de transfert." Montpellier 2, 1995. http://www.theses.fr/1995MON20065.

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Un nouveau type de membrane organo-inorganique de nanofiltration obtenue par depot de proteines sur une ceramique poreuse est presente. Le travail consiste a rechercher son protocole d'elaboration selon un critere de retention maximale puis a etudier ses proprietes a l'aide de modeles classiques. Le protocole d'elaboration comprend un conditionnement du support ceramique par filtration tangentielle d'une solution proteique (ici de la gelatine) suivi d'une modification du depot forme par traitements chimique (ici un tannage au formol) puis thermique. La membrane a ete caracterisee en permeation

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Xu, Zitong. "Removal of Heavy Metal Ions from Aqueous Solution by Alkaline Filtration." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/40105.

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An innovative approach for the removal of heavy metal ions such as Pb2+ and Cd2+ from aqueous solution was evaluated. It was established that alkaline filtration, which is in essence the combination of alkaline precipitation and membrane filtration, could drastically increase both the efficiency and completeness of Pb2+ or Cd2+ ions removal, producing water whose metal concentration satisfying drinking water standard from a simulation wastewater containing 5 ppm or more Pb2+ or Cd2+ ions. Filtration with three different membranes, including microfiltration (MF), ultrafiltration (UF), and nanof

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Santiwong, Suvinai Rensis Civil &amp Environmental Engineering Faculty of Engineering UNSW. "Analysis of compressible cake behaviour in submerged membrane filtration for water treatment." Publisher:University of New South Wales. Civil & Environmental Engineering, 2008. http://handle.unsw.edu.au/1959.4/42611.

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In this study, Smiles?? sorptivity-diffusivity numerical analysis is demonstrated to offer a comprehensive description of dead-end constant-pressure compressible cake filtration for water treatment. In addition to providing an insight on filtration performance and cake behaviour in terms of cake hydraulic permeability and compressibility in good agreement with the results derived using Ruth??s conventional cake filtration theory, the sorptivity-diffusivity model can be used to gain further information on depth-dependent local cake properties and extend our knowledge on the effect of feed suspe

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Kumar, Shivendra. "An Analytical Index for Evaluating Low-Pressure Hollow-Fibre Membrane Systems." Thesis, Griffith University, 2015. http://hdl.handle.net/10072/366948.

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Water and wastewater treatment through the use of membrane filtration technology is one of the processes utilised currently to meet the growing demand for water. While new technologies can harness water from various non-traditional sources such as oceans, there remains the possibility of making drinking water more expensive through the use of costly treatment equipment. To prevent this and ensuing catastrophes around the world, the water industry needs a strategy that keeps the price of water and price of products aiding in the treatment of water controlled into the future. The overall aim of

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Rouquié, Camille. "Microfiltration de jus de fruits et suspensions à base de fruits : faisabilité et performances d'une filtration par membranes immergées." Thesis, Montpellier, 2018. http://www.theses.fr/2018MONTG041/document.

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La microfiltration est largement utilisée pour la clarification, la stabilisation et la concentration de nombreuses suspensions à base de fruits (jus de fruits, agro-déchets, vin, etc.). Malgré ses divers avantages, la microfiltration présente néanmoins un inconvénient majeur qui est le phénomène de colmatage qui s’installe pendant l’opération de filtration et entraîne une diminution de la perméabilité membranaire. Si de nombreux mécanismes de colmatage (adsorption, blocage de pores, etc.) sont observés pendant la filtration de suspensions polydisperses comme les jus de fruits ou certains copr

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Chan, Robert Chemical Engineering &amp Industrial Chemistry UNSW. "Fouling mechanisms in the membrane filtration of single and binary protein solutions." Awarded by:University of New South Wales. Chemical Engineering and Industrial Chemistry, 2002. http://handle.unsw.edu.au/1959.4/18832.

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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 monitoring of the transmembrane pressure (TMP) and rejection. Electron microscopy was employed to study fouling on microfiltration membranes when single protein solutions were filtered while a novel method involving Matrix-Assisted Laser Desorption Ionisation Mass Spectrometry (MALDI-MS) was developed to qu

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Ferlita, Russell Rosario. "In Situ Biofiltration of Dissolved Organic Carbon in Reverse Osmosis Membrane Filtration." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3101.

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Biofouling, or the formation of biofilm on membrane surfaces, can decrease the performance (decreased flux and/or increased operating pressure) of a reverse osmosis (RO) membrane system in a water treatment plant. However, biofilms have been used in water treatment systems to remove organic carbon from water via biofilters and successfully reduce biofilm growth downstream. This research investigates the possibility that the heterotrophic biofilm present on membrane surfaces removes nutrients from the treatment water, thereby making it nutrient deprived as it travels along the treatment train

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Pritchard, Mark. "The influence of rheology upon mass transfer in cross-flow membrane filtration." Thesis, University of Bath, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278262.

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Ponnumallayan, Prasanna. "Development of a novel stimuli responsive filtration membrane using self-assembling peptides." Thesis, University of Canterbury. Department of Chemical and Process Engineering, 2014. http://hdl.handle.net/10092/11032.

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Membrane based separation of specific constituents from a complex mixture is a wellestablished technology. Numerous filtration membranes have been developed for separations based on size, charge and hydrophobicity. Alternatively, synthetic membranes have been modified using various materials (e.g. charged polymers), to induce stimuli responsiveness and achieve specific separation goals. However, controlling finer separations based on more complex properties has been a challenge. Further improvements in separations could be made with a universal membrane that could be used for a wide range of a

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Lin, Changlong, and 林昌隆. "Chemical Treatment and Membrane Filtration of Fluoride-containing: Chemical Treatment and Membrane Filtration of Fluoride-containing." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/91713972744488096628.

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碩士<br>國立交通大學<br>環境工程所<br>91<br>The treatment of the fluoride-containing wastewater and the enormous amount of sludge generated has been a challenge for the HSIP. Fluoride-containing wastewater is generated during the etching and clean processes of semiconductor production. The range of fluoride concentration is usually between 200 and 500 mg/l. However, concentrations as high as 1000 to 2000 mg/l have been reported. In Taiwan, the most popular way of treating the fluoride-containing wastewater is the precipitation/coagulation/sedimentation process. The fluoride is first precipita

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Pickering, Karen Dunphy. "A cost model for membrane filtration." Thesis, 1992. http://hdl.handle.net/1911/13629.

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A model is developed that calculates capital and operating cost of cross-flow membrane filtration as a function of relevant design parameters. An expression for capital cost is empirically derived from information gathered from membrane manufacturers. Operating cost is divided into components for energy consumption, chemical demand, membrane replacement and concentrate disposal and is determined from attributes of the membrane system. The effect of operating parameters and membrane characteristics on cost are examined. The flux of permeate across a membrane is the principle factor determining

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Bernardy, Jeffry A. "Cannery waste management using membrane filtration." 1990. http://catalog.hathitrust.org/api/volumes/oclc/23113829.html.

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Thesis (M.S.)--University of Wisconsin--Madison, 1990.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 77-85).

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Ye, Yun. "Macromolecular fouling during membrane filtration of complex fluids /." 2005. http://www.library.unsw.edu.au/~thesis/adt-NUN/public/adt-NUN20051020.123104/index.html.

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Boyle, Paul Martin. "A Refined Parallel Simulation of Crossflow Membrane Filtration." Thesis, 2011. http://hdl.handle.net/1911/64390.

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This work builds upon the previous research carried out in the development of a simulation that incorporated a dynamically-updating velocity profile and electric interactions between particles with a Force Bias Monte Carlo method. Surface roughness of the membranes is added to this work, by fixing particles to the membrane surface. Additionally, the previous electric interactions are verified through the addition of an allrange solution to the calculation of the electrostatic double layer potential between two particles. Numerous numerical refinements are made to the simulation in order to ens

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