Effect of calcium ions on fouling properties of alginate solution and its mechanisms

Zhang, Meijia; Lin, Hongjun; Shen, Liguo; Liao, Baoqiang; Wu, Xilin; Li, Renjie

doi:10.1016/j.memsci.2016.12.006

Cited by 151 publications

(28 citation statements)

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“…Consequently, this finding indicated the existence of an "optimal" mixing ratio between alginate sodium and Ca 2+ that would cause the most serious membrane fouling. Recently, the unimodal mode of fouling in the filtration of fixed concentration of foulant with varying Ca 2+ level was also reported [37,38]. However, the exact interaction between foulant and Ca 2+ and the inner structure of these networks should be further explored.…”

Section: Effects Of Calcium Ion On Alginate Foulingmentioning

confidence: 95%

Filtration Performances of Different Polysaccharides in Microfiltration Process

et al. 2019

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Membrane technology has been widely applied for water treatment, while membrane fouling still remains a big challenge. The polysaccharides in extracellular polymeric substances (EPS) have been known as a significant type of foulant due to their high fouling propensity. However, polysaccharides have many varieties which definitely behave differently in membrane filtration. Therefore, in this study, different polysaccharides alginate sodium and xanthan gum were chosen to study their effects on membrane fouling in a wide concentration range. The results demonstrated that the filtration behaviors of alginate sodium and xanthan gum were completely different, which was due to their different molecular structures. Alginate had a small molecular weight and it was easy for alginate to penetrate membrane pores resulting in pore blocking. A series of concentrations of alginate including 5 mg/L, 10 mg/L, 20 mg/L, 30 mg/L, 40 mg/L, and 50 mg/L were examined and it was found that the permeate flux decline highly depended on the level of alginate in the feed water. While for the filtration of xanthan gum, the same concentration of xanthan gum led to more serious fouling than that observed in alginate, which might be due to its large molecule. In addition, calcium chloride was added in the solutions of both alginate and xanthan gum to examine the influence of a divalent cation on polysaccharide fouling. A “unimodal” peak can be observed in the fouling propensity caused by Ca2+ and alginate with increasing the concentration of alginate. Such a phenomenon was not found in the fouling of xanthan gum and Ca2+ led to more serious fouling for all concentrations of xanthan gum. In light of this, this study gave new insights into the fouling propensities of different polysaccharides.

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Section: Effects Of Calcium Ion On Alginate Foulingmentioning

confidence: 95%

Filtration Performances of Different Polysaccharides in Microfiltration Process

et al. 2019

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“…Mg 2+ and Ca 2+ and their occasional precipitation (e.g. CaCO3, Mg(OH)2) can cause serious operating issues in MET coupled with desalination and reverse electrodialysis (Mei and Tang, 2018;Ping et al, 2013;Vermaas et al, 2013; occurring organic matter in water resources and thus contribute to the development of compact fouling layers on the membrane (Luo et al, 2012ab;Zhang et al, 2017bZhang et al, , 2018. Furthermore, they can enhance bio-flocculation, which is one of the keymechanisms of membrane fouling.…”

Section: Role Of Membranes In Microbial Electrochemical Technologies mentioning

confidence: 99%

A review of the innovative gas separation membrane bioreactor with mechanisms for integrated production and purification of biohydrogen

Bakonyi

Kumar

Bélafi–Bakó

et al. 2018

Bioresource Technology

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This review article focuses on an assessment of the innovative Gas Separation Membrane Bioreactor (GS-MBR), which is an emerging technology because of its potential for in-situ biohydrogen production and separation. The GS-MBR, as a special membrane bioreactor, enriches CO directly from the headspace of the anaerobic H fermentation process. CO can be fed as a substrate to auxiliary photo-bioreactors to grow microalgae as a promising raw material for biocatalyzed, dark fermentative H-evolution. Overall, these features make the GS-MBR worthy of study. To the best of the authors' knowledge, the GS-MBR has not been studied in detail to date; hence, a comprehensive review of this topic will be useful to the scientific community.

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“…Moreover, it was reported that divalent cations, i.e. calcium, can affect the coordination and physical structure of gel layer, further enhancing its filtration resistance through binding and crosslinking of organic polymers (Zhang et al, 2017(Zhang et al, , 2018. Therefore, high concentration of calcium in cheese whey can be an important factor on fouling development and decreasing membrane permeability in the AnMBR.…”

Section: Long Term Filtration Performancementioning

confidence: 99%

Treatment of cheese whey by a cross-flow anaerobic membrane bioreactor: Biological and filtration performance

Dereli

Zee

Öztürk

et al. 2019

Environmental Research

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A B S T R A C TWhey, produced in large quantities during cheese production, is a rapidly fermentable high strength wastewater characterized by a high biodegradability and low alkalinity. In this study, a lab-scale cross-flow anaerobic membrane bioreactor was used to address the commonly experienced difficulties such as unstable reactor performance and unexpected biomass losses when treating whey wastewater with conventional anaerobic reactors. The anaerobic membrane bioreactor provided a stable treatment performance, i.e. more than 90% chemical oxygen demand removal, and moderate membrane fluxes between 8 and 11 L m −2 h −1 could be obtained, applying a low cross-flow velocity of about 0.5 m s −1 . Short term critical flux tests revealed that higher fluxes up to 36 L m −2 h −1 are possible at elevated cross-flow velocities and/or reduced mixed liquor suspended solids concentrations. Sludge filterability indicated by capillary suction time and specific resistance to filtration deteriorated throughout the study. Chemical cleaning efficiency gradually decreased, indicating irreversible membrane fouling during long term operation.

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Effect of calcium ions on fouling properties of alginate solution and its mechanisms

Cited by 151 publications

References 50 publications

Filtration Performances of Different Polysaccharides in Microfiltration Process

Filtration Performances of Different Polysaccharides in Microfiltration Process

A review of the innovative gas separation membrane bioreactor with mechanisms for integrated production and purification of biohydrogen

Treatment of cheese whey by a cross-flow anaerobic membrane bioreactor: Biological and filtration performance

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