Experimental study of ultrafiltration membrane fouling by sodium alginate and flux recovery by backwashing

Katsoufidou, K.; Yiantsios, S.G.; Karabelas, A.J.

doi:10.1016/j.memsci.2007.05.017

Cited by 253 publications

(144 citation statements)

References 28 publications

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“…These interactions prompt a denser fouling layer which results in an augmented overall resistance to water permeation. These observations are in agreement with those found by Jermann et al (2007) and Katsoufidou et al (2007) in UF studies with alginate (a typical model polysaccharide used as EOM surrogate) in the presence of calcium.…”

Section: Aom Fouling Potential In Pac/ufsupporting

confidence: 91%

PAC/UF for Removing Cyanobacterial Cells and Toxins from Drinking Water

Campinas¹,

Rosa²

2011

Expanding Issues in Desalination

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Section: Aom Fouling Potential In Pac/ufsupporting

confidence: 91%

PAC/UF for Removing Cyanobacterial Cells and Toxins from Drinking Water

Campinas¹,

Rosa²

2011

Expanding Issues in Desalination

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“…1b). Three different fouling mechanisms often occur in the application of porous UF membrane technology: pore constriction, pore blocking and cake layer [7,42,43]. Particle size distribution plays an important role in the membrane fouling mechanism [44].…”

Section: Discussionmentioning

confidence: 99%

Effect of aluminum speciation on ultrafiltration membrane fouling by low dose aluminum coagulation with bovine serum albumin (BSA)

Wang

et al. 2015

Journal of Membrane Science

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a b s t r a c tUp to now, many studies have focused on ultrafiltration (UF) membrane fouling when sweep flocculation is the main coagulation mechanism. However, there has been less focus on cases where charge neutralization is the main coagulation mechanism. Herein, UF membrane performance was investigated when bovine serum albumin (BSA) was coagulated with low dose aluminum chloride (AlCl 3 ) or polyaluminum chloride (PACl). For AlCl 3 or PACl, a large flux decline occurred at pH 5.5 and membrane fouling was steadily alleviated with increasing pH, resulting in a strong correlation between membrane flux and the corresponding solution pH. As pH rose, the proportions of Al ms (monomeric and small polymeric alum species) and Al u species (i.e., solid phase Al(OH) 3 ) gradually increased. A correlation was also observed between membrane flux and the proportions of Al ms and Al u . Compared with AlCl 3 , much more serious membrane fouling was induced when BSA was coagulated with PACl, owing to the lower proportions of Al ms and Al u species in the PACl system. For AlCl 3 , the potential fouling mechanism was pore constriction or blocking when the proportions of Al ms and Al u were lower than 62.3 75.1% (pH 6.0), followed by cake layer as the main fouling mechanism. For PACl, however, pore constriction or blocking occurred when the proportions of Al ms and Al u were lower than 35.473.2% (pH 6.5), and cake layer gradually became the main fouling mechanism.

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“…Permeate backflow techniques include backwashing [3,13], backflushing [14,15], backpulsing [16], and backshock (backpulse with a reverse asymmetric membrane) [17,18]. An extra pump (hence require extra energy, more complicate control system) in the permeate pipe is needed to convert the TMP periodically during the operation and by that the backflow of the permeate lifts up the foulants which are then swept away by the crossflow of the retentate.…”

Section: Citationmentioning

confidence: 99%

“…Research on applications of membrane separation processes for treatment of wastewater is very active. NF applied to ultrafiltrate of whey has a twofold purpose; recovery of lactose from the retentate and reduction on volume of wastewater required to be treated at the plant since the nanofiltrate can be discharged directly into the sewer [2,13]. Permeate of a single RO or a NF + RO operation could be reused as heating, cooling, cleaning and boiler feed water [57,58].…”

Section: Wastewater Treatmentmentioning

confidence: 99%

Untitled

2017

JABB

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The use of membrane technology as a processing and separation method in food industry is gaining wide application. Membrane separations can be used either as alternatives to conventional techniques or as novel technology for processing new ingredients and foods. Membrane separations are considered green technologies. In many cases, membrane processes are more advantageous than traditional technologies. For example, using cold pasteurization and sterilization with suitable membranes instead of high temperature treatment for the removal of microorganisms is more economical in terms of energy consumption. Using membrane filtration to remove microorganisms for shelf-life extension of foods instead of using additives and preservatives also create a green image for the processed foods as well as for the processing procedure. Concentration by membrane filtration instead of thermal evaporation does not employ severe heating and that it preserves the natural taste of food products and the nutritional value of heat-sensitive components. The recovery of valuable components in diluted effluents and wastewater treatment applications are among the most useful and currently active aspects of membrane technology. Pressure-driven membrane processes, namely MF, UF, NF and RO facilitate separation of components with a large range of particle sizes. It is for this reason that they find wide range of applications in food processing industry. The first part of this manuscript is to give introduction about very basic knowledge in membrane separation technology. More importantly, this review presents up-to-date commercial and potential applications of pressure-driven membrane separation processes in dairy processing industry. Keywords: Introduction Theory of membrane separationsPressure-driven membrane processes: The pressure-driven membrane processes include microfiltration (MF), ultrafiltration (UF), nanofiltration (NF), and reverse osmosis (RO). When a feed is introduced to a membrane separation system it is separated into retentate (sometimes called concentrate), the fraction that is retained by the membrane, and permeate (also called filtrate), the fraction that passes through the membrane. The products of interest can either be in the retentate or in permeate or in both streams. The word 'pressure-driven' means that the main driving force for separation of these processes is transmembrane pressure (TMP), which is the pressure discrepancy between retentate sides and permeate side. Generally speaking, the pore sizes (or MWCO-molecular weight cut-off in cases of NF and RO) of membranes decrease in the order from MF to RO (Figure 1). However, the separation principle is not based on the pore sizes alone. Especially in UF and NF the charge of the molecules/solutes and their affinity for the filtering membrane are also important [1]. MF is normally used for separation of suspended particles and microorganisms from soluble components in feed. UF can be applied to separate soluble macromolecules such as proteins and peptides. NF...

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Experimental study of ultrafiltration membrane fouling by sodium alginate and flux recovery by backwashing

Cited by 253 publications

References 28 publications

PAC/UF for Removing Cyanobacterial Cells and Toxins from Drinking Water

PAC/UF for Removing Cyanobacterial Cells and Toxins from Drinking Water

Effect of aluminum speciation on ultrafiltration membrane fouling by low dose aluminum coagulation with bovine serum albumin (BSA)

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