Cross Flow Filtration
Mostrando 1-12 de 19 artigos, teses e dissertações.
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1. Tratamiento de efluentes acuosos provenientes de la industria de biodiesel, utilizando tecnología de membranas
ABSTRACT The wastewaters from biodiesel production are generated mainly in the washing process, in this step the contaminants of biodiesel are eliminated in order to the obtained biodiesel meets with the internationals regulations. These wastes contain impurities such as methyl ester, residual oil, mono and diglycerides, soluble salts, catalyst, soap, glycer
Matéria (Rio J.). Publicado em: 19/07/2018
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2. APPLICATION OF A SURFACE-RENEWAL MODEL TO PERMEATE-FLUX DATA FOR CONSTANTPRESSURE CROSS-FLOW MICROFILTRATION WITH DEAN VORTICES
AbstractThe introduction of flow instabilities into a microfiltration process can dramatically change several elements such as the surface-renewal rate, permeate flux, specific cake resistance, and cake buildup on the membrane in a positive way. A recently developed surface-renewal model for constant-pressure, cross-flow microfiltration (Hasan et al., 2013)
Braz. J. Chem. Eng.. Publicado em: 2015-06
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3. INFLUENCE OF RESIDENCE-TIME DISTRIBUTION ON A SURFACE-RENEWAL MODEL OF CONSTANT-PRESSURE CROSS-FLOW MICROFILTRATION
Abstract This work examines the influence of the residence-time distribution (RTD) of surface elements on a model of cross-flow microfiltration that has been proposed recently (Hasan et al., 2013). Along with the RTD from the previous work (Case 1), two other RTD functions (Cases 2 and 3) are used to develop theoretical expressions for the permeate-flux decl
Braz. J. Chem. Eng.. Publicado em: 2015-03
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4. Fouling behavior and performance of microfiltration membranes for whey treatment in steady and unsteady-state conditions
Whey pretreatment for protein purification is one of the main applications of cross-flow microfiltration before an ultrafiltration process. In this paper, the effects of the operating pressure and crossflow velocity on the membrane performance and the individual resistances in microfiltration of whey for both unsteady and steady-state conditions were investi
Braz. J. Chem. Eng.. Publicado em: 2014-06
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5. A surface-renewal model of cross-flow microfiltration
A mathematical model using classical cake-filtration theory and the surface-renewal concept is formulated for describing cross-flow microfiltration under dynamic and steady-state conditions. The model can predict the permeate flux and cake buildup in the filter. The three basic parameters of the model are the membrane resistance, specific cake resistance and
Braz. J. Chem. Eng.. Publicado em: 2013-03
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6. Characterization of the selectivity of microsieves using a cross-flow microfiltration system
Filtration through membranes is a process largely employed in the food and chemical industry to separate particles. Sieves present some advantages in relation to conventional membranes such as high homogeneity in the pore sizes, smooth surfaces, straight-through pores, etc. In this paper we compare the selectivity in the exclusion of particles by size of sie
Brazilian Journal of Chemical Engineering. Publicado em: 2010-12
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7. Modelagem numérica do escoamento num tubo permeável aplicada ao processo de filtração tangencial / Numerical modeling of the flow in permeable tube applied to the cross-flow filtration process
Estudos aplicados ao processo de filtração tangencial têm sido o objetivo de muitos trabalhos devido a sua ampla capacidade de adequação aos mais diversos processos industriais. Os mecanismos de transferência associados a esse processo envolvem basicamente o escoamento em tubos permeáveis (ou membranas) com fenômenos de transferência de massa presen
Publicado em: 2008
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8. Removal of the organic contaminants β-estradiol and saxitoxins (STX, Neo-STX and dc-STX) by nanofiltration : bench scale / Remoção dos contaminantes orgânicos B-estradiol e saxitoxinas (STX, Neo-STX e dc-STX) por meiom de nanofiltração : avaliação em escala de bancada
The aim of work was to investigate the removal of β-estradiol and saxitoxins (STX, dc- STX and Neo-STX) by nanofiltration. These contaminants were selected due to its growing detection in drinking water reservoirs and their potential risk to human health, even at low concentrations. According to the literature, these substances are only poorly removed b
Publicado em: 2007
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9. Desenvolvimento e estudo de um reator UASB com unidade de filtração, utilizado para o tratamento de esgoto sanitário / Development and study of a UASB reactor coupled with a filtration unit for the treatment of domestic sewage
An anaerobic reactor (UASB Upflow Anaerobic Sludge Blanket) coupled to a filtration unit for the treatment of domestic sewage was developed and studied. The study began by operating the UASB reactor for 642 days, during which time the influent and effluent liquid phase were monitored. The filtration unit was then coupled to the UASB reactor and the filtra
Publicado em: 2006
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10. Demulsifying of stable emulsions of water and sunflower oil by cross-flow filtration process / Desemulsificação de emulsões estáveis de água e óleo de girassol por processo de filtração tangencial
O processo estudado utilizou tubos cerâmicos porosos fabricados predominantemente com alumina e produzidos pela técnica da colagem de barbotina e sinterizados a temperaturas próximas a 1450 graus Celsius, para seleção de uma temperatura. O meio micro poroso foi caracterizado pela técnica de porosimetria por intrusão de mercúrio, apresentando tamanho
Publicado em: 2005
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11. Estudo experimental do escoamento e da concentração de mistura no processo de filtração tangencial de suspensões macromoleculares / Experimental study of the flow and mixture concentration in the cross-flow filtration of macromolecular suspensions
O processo de microfiltração tangencial com membranas tubulares inorgânicas e tubos microporosos, respectivamente de origem importada e nacional, foi investigado tendo-se como objeto de separação as misturas macromoleculares preparadas com os agentes polissacarídeos gomas Xantana e Guar em suspensão aquosa. São evidenciados neste processo os efeitos
Publicado em: 2004
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12. Despirogenação de soluções de imunoglobulina G humana : adsorção de endotoxinas em membrana de quitosana
Endotoxin (ET) contamination in intravascular injection products is a problem for the pharmaceutical industry due to the difficulty of its removal and elevated toxicity. Many techniques have been studied aiming the depyrogenation (ET removal) of protein solutions, among them the membrane chromatography seems to be a promising one. In this work, cross-linked
Publicado em: 2003