Effect of gas sparging on flux enhancement and phytochemical properties of clarified pineapple juice by microfiltration

Laorko, Aporn; Li, Zhenyu; Tongchitpakdee, Sasitorn; Youravong, Wirote

doi:10.1016/j.seppur.2011.05.024

Cited by 36 publications

(20 citation statements)

References 23 publications

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“…This is discussed a little later. A similar trend was reported by other studies (25,36), although in case of ultra-and microfiltration operations.…”

Section: Effect Of Cross-flow Velocitysupporting

confidence: 90%

“…The marginal enhancement of permeate flux with gas sparging could be explained by both the shear related enhancement effect (as reflected by shear stress number in Table 2) and the presence of secondary flow (25). Albeit, this result is somewhat unimpressive compared to the enhancing effect of gas sparging on flux in the microfiltration of pineapple juice by Laorko et al (2011) (36).…”

Section: Effect Of Gas Sparging On Permeate Flux and Rejectionmentioning

confidence: 88%

“…This indicates that although the permeate flux in the nanofiltration was sustained considerably by the gas sparging, there was no significant improvement of the rejection behavior of the solutes. Probably, the reduced effectiveness of gas sparging in the flat sheet module is due first to the high shear liquid flow in the system, which limits the concentration polarization itself, leaving less room for further possible enhancement by gas sparging, and second to the maldistribution of bubbles in the flat sheet module (36). The injected bubbles were unevenly distributed on the membrane surface, and some parts were bubble free.…”

Section: Effect Of Gas Sparging On Permeate Flux and Rejectionmentioning

confidence: 99%

See 2 more Smart Citations

Mitigation of Flux Decline in the Cross-Flow Nanofiltration of Molasses Wastewater under the Effect of Gas Sparging

Nath¹,

Patel²

2014

Separation Science and Technology

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Gas sparging has been shown to significantly affect the performance of nanofiltration of molasses wastewater using a hydrophilized polyamide membrane (molecular weight cut-off 250) in a flat sheet module. Sparging of nitrogen at two different gas velocities was capable of appreciable alleviation of permeate flux decline over a period of time under the present experimental conditions when compared with the conventional unsparged nanofiltration. Critical flux (J crit ), limiting flux (J lim ), and shear stress number (N s ) were determined at different cross-flow velocities for both the cases in the presence and absence of gas sparging. Increase in N s with increasing cross-flow velocity was more pronounced in presence of gas sparging. Almost 1.5-2 fold increase in N s was observed using cross-flow velocity of 0.8 ms −1 with gas sparging, compared to the case of "no sparging." However, there was no significant improvement of rejection behavior of the solutes in presence of gas sparging. The value of mass transfer coefficient was considerably higher with increasing cross-flow velocity, while gas sparging was on, as against the case of "no sparging." In terms of percentage increase in permeate flux with increase in trans-membrane pressure (TMP), gas sparging could achieve higher enhancement where concentration polarization is expected to be severe, that is, at high TMP and high feed concentrations. Some practical issues and technical limitations of gas sparging are also discussed.

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“…This is discussed a little later. A similar trend was reported by other studies (25,36), although in case of ultra-and microfiltration operations.…”

Section: Effect Of Cross-flow Velocitysupporting

confidence: 90%

Section: Effect Of Gas Sparging On Permeate Flux and Rejectionmentioning

confidence: 88%

Section: Effect Of Gas Sparging On Permeate Flux and Rejectionmentioning

confidence: 99%

See 1 more Smart Citation

Mitigation of Flux Decline in the Cross-Flow Nanofiltration of Molasses Wastewater under the Effect of Gas Sparging

Nath¹,

Patel²

2014

Separation Science and Technology

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“…(22)(23)(24)(25)(26)(27)(28)(29)(30) The sensorial and nutritional quality of the juices produced around the world and especially in developing countries are a relevant topic. Some problems encountered are loss of vitamin C during heat treatment, (20,31,32) and nonenzymatic browning, the Maillard reaction, after processing.…”

Section: Introductionmentioning

confidence: 99%

Effect of Processing on the Quality of Pineapple Juice

Hounhouigan

Linnemann

Soumanou

et al. 2014

Food Reviews International

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Pineapple processing plays an important role in juice preservation. Because the quality of the pineapple juice is affected by the processing technology applied, the effects of pasteurization and other preservation methods on the overall juice quality were discussed. During juice processing, microorganisms are destroyed and chemical changes occur. To optimize processing conditions, knowledge of the kinetics of these reactions is needed, but as of yet, data on the degradation of the amino acids and vitamin C and the change in sugar contents during pineapple juice pasteurization are scanty. Furthermore, the kinetics of hydroxymethylfurfural production should be investigated by a precise technique such as high-performance liquid chromatography.

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“…All the parameters of the product from both the processes are comparable but since microfiltration removes all the suspended solids, it was selected as a better alternative. Crossflow microfiltration was used to clarify pineapple (11,12), melon (13), passion fruit juice (14), apple (15)(16)(17), pomegranate (18,19), bergamot (20), chicory (21,22), and acerola (23).…”

Section: Introductionmentioning

confidence: 99%

Primary Clarification of Banana Juice Extract by Centrifugation and Microfiltration

Sagu

Karmakar

Nso

et al. 2014

Separation Science and Technology

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Banana is a much appreciated tropical fruit due to its unique aroma, flavor, and also for its nutritional and energetic components. In this work, banana juice was extracted by pectinase treatment at room temperature. The resultant juice was clarified by two methods, namely, centrifugation and microfiltration. A comparative study was performed between these two primary clarification methods. Response surface methodology was used to optimize the parameters of centrifugation (speed and time) as well as microfiltration (transmembrane pressure and cross flow rate). The juice was characterized in terms of viscosity, clarity, alcohol insoluble solids (AIS), polyphenol, and protein content. Centrifuged juice contained high concentration of total polyphenol and protein. Juice obtained from microfiltration had lower viscosity, AIS, and higher clarity. Also, the energy consumption of the centrifuge is much higher than that of microfiltration.

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Effect of gas sparging on flux enhancement and phytochemical properties of clarified pineapple juice by microfiltration

Cited by 36 publications

References 23 publications

Mitigation of Flux Decline in the Cross-Flow Nanofiltration of Molasses Wastewater under the Effect of Gas Sparging

Mitigation of Flux Decline in the Cross-Flow Nanofiltration of Molasses Wastewater under the Effect of Gas Sparging

Effect of Processing on the Quality of Pineapple Juice

Primary Clarification of Banana Juice Extract by Centrifugation and Microfiltration

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