Crossflow Microfiltration
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Fabrication and characterization of low cost ceramic membranes for microfiltration of Acutodesmus obliquus using modified clays
RESUMO Membranas de microfiltração em cerâmica tubular foram preparadas por extrusão de misturas de argilas naturais (NC) e argilas tratadas termicamente (TC) em diferentes frações com a adição de amido de mandioca catiônico. Estudos anteriores verificaram que membranas contendo TC possuíam maior permeabilidade hidráulica e fluxo permeado do que a
Matéria (Rio J.). Publicado em: 25/11/2019
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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. Crossflow microfiltration of sugarcane juice: effects of processing conditions and juice quality
Sugarcane juice with passion fruit pulp was clarified using microfiltration under different T (temperature), P (pressure), and V (tangential velocity). The effects of these processing parameters were evaluated applying a rotational central composite experimental design (RCCD) and response surface methodology (RSM). The tests were performed at a filtration pi
Food Sci. Technol. Publicado em: 2014-03
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6. 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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7. 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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8. Estudo do desempenho do processo de microfiltração tangencial com membranas cerâmicas aplicado à retenção de bactérias e redução de sólidos suspensos de uma bebida à base de açaí / Performance study of the crossflow microfiltration process with ceramic membranes applied to the bacteria retention and suspended solids reduction of the beverage based on açai
In this doctoral research, the crossflow microfiltration process utilizing ceramic membranes was investigated aiming at the bacteria retention (Escherichia coli) and reduction of suspended solids of beverage based on açai (Euterpe oleracea Mart.). The selected commercial membranes of alfa-alumina (AL IND.2O IND.3) had nominal pore sizes of 0.8 and 1.2 müm
Publicado em: 2010
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9. Microfiltraçao de suco de tamarindo (Tamarindus indica L.) por membrana polimerica : efeito do tratamento enzimatico, da velocidade tangencial e da pressao transmembrana / Microfiltration of tamarind (Tamarindus indica L.) juice by polymeri membrane : effects of enzymatic treatment, crossflow velocity and transmembrane pressure
A aplicação do processo de microfiltração para clarificação de certos sucos de frutas tem demonstrado resultados economicamente viáveis. Inúmeros sucos de frutas típicas do Brasil ainda não foram testados neste tipo de processo, visando a sua clarificação. Suco de tamarindo (Tamarindus indica L.) reconstituído na proporção de 1 de polpa para 3
Publicado em: 2007
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10. Avaliação da microfiltração tangencial como alternativa de tratamento avançado de efluente gerado em sistema de tratamento de esgoto sanitário constituído de reator UASB (Upflow Anaerobic Sludge Blanket) seguido de tanque de aeração / The evaluation of crossflow microfiltration as an alternative for advanced treatment of effluent generated in a system of sewage treatment composed by a UASB (Upflow Anaerobic Sludge Blanket) reactor followed by an aeration tank
The proposal of this research was to evaluate the crossflow microfiltration as an alternative for an advanced treatment of effluent generated in a system of sewage treatment composed by a UASB (Upflow Anaerobic Sludge Blanket) reactor followed by an aeration tank. This work aimed to evaluate the membranes physical cleaning methods (backwashing with compresse
Publicado em: 2006
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11. Investigation of the performance of diferent micro-porous tubular structures in the retention of bacteria emulsion by crossflow microfiltration / Investigação do desempenho de diferentes estruturas microporosas tubulares na retenção de bactérias em suspensão por microfiltração tangencial
Neste trabalho são apresentados resultados experimentais do processo de filtração tangencial de uma suspensão in natura (soro de leite) aplicada na retenção de bactérias do grupo coliforme. No estudo do processo de separação utilizaram-se tubos microporosos de -alumina (Al2O3) e membranas comerciais de tamanho médio de poros no valor de 0,8 e 1,2m.
Publicado em: 2006
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12. Effect of the enzymatic treatment, the crossflow velocity and the transmembrane pressure during the microfiltration of umbu (Spondias tuberosa Arr. Cam. ) diluted pulp. / Efeito do tratamento enzimatico, da velocidade tangencial e da pressão transmembrana na microfiltração da polpa diluida de umbu (Spondias tuberosa Arr. Cam.).
O umbu (Spondias tuberosa Arr. Cam.) é uma fruta tropical brasileira de grande potencial sócio-econômico e de excelentes características organolépticas. Seu consumo, porém, é limitado às regiões nativas do fruto, devido à sua alta perecibilidade. A expansão do mercado consumidor desta fruta implica no desenvolvimento de processos que permitam cons
Publicado em: 2006