Effect of operating parameters on performance of nanofiltration of sugar beet press water

Noghabi, Mostafa Shahidi; Razavi, Seyed Mohammad Ali; Mousavi, Seyed Mahmoud; Elahi, Mohammad; Niazmand, Razieh

doi:10.1016/j.profoo.2011.09.025

Cited by 16 publications

(6 citation statements)

References 5 publications

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“…Rejection of organic acid also slightly reduced. The same effect of temperature on solutes was also reported in some of the literature [ 22 , 23 , 24 , 25 ]. This can be explained by the expansion of the active layer structure because the higher temperatures increase the mobility of polymer chains, causing the membrane’s porosity and pore size to increase.…”

Section: Resultssupporting

confidence: 79%

Influences of Technological Parameters on Cross-Flow Nanofiltration of Cranberry Juice

Lại

Tagashira²,

Hagiwara

et al. 2021

Membranes

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The paper focused on the influence of operative conditions on the separation of benzoic acid from 10 °Brix cranberry juice by cross-flow nanofiltration with a plate and frame pilot scale (DDS Lab Module Type 20 system). Six kinds of commercial nanofiltration membrane were investigated. The results showed that the rejection of benzoic acid was significantly lower than that of other components in cranberry juice, including sugars and other organic acids. In a range of 2–7.5 L/min, feed flow rate slightly affected the performance of nanofiltration. Higher temperatures resulted in higher permeate flux and lower rejection of benzoic acid, whereas rejection of sugar and organic acid was stable at a high value. In a range of 2.5–5.5, pH also significantly affected the separation of benzoic acid and negative rejection against benzoic acid was observed at pH 4.5 with some of the membranes. This implies that pH 4.5 is considered as an optimum pH for benzoic acid separation from cranberry juice. The lower permeate flux caused a lower rejection of benzoic acid and negative rejection of benzoic acid was observed at the low permeate flux. Pretreatment by ultrafiltration with CR61PP membranes could improve the permeate flux but insignificantly influenced the efficiency of separation. The results also indicated that NF99 and DK membranes can be effectively used to separate benzoic acid from cranberry juice.

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Section: Resultssupporting

confidence: 79%

Influences of Technological Parameters on Cross-Flow Nanofiltration of Cranberry Juice

Lại

Tagashira²,

Hagiwara

et al. 2021

Membranes

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“…To assess the validity of assuming an average pore radius for each membrane, Fig. 5 shows the comparison between the experimental limiting rejection values and the theoretical curve, defined in equation (24). Since glycerol did not reach the limiting rejection within the investigated pressure range, the value of limiting rejection used in Fig.…”

Section: Permeability Test and Organics Rejection: Estimation Of Porementioning

confidence: 99%

“…Within the food industry, NF is widely applied in the beverage industry for juice concentration [21] and in the dairy industry for lactose recovery and whey demineralization [22,23]. Another industrial food sector that uses membrane processes is the sugar industry, where NF is used to treat the sugar beet press water [24] or to purify and recover the brine produced by the regeneration of the ion exchange resins used for sugar decolourisation [25].…”

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical characterization of commercial nanofiltration membranes for the treatment of ion exchange spent regenerant

Micari

Diamantidou

Heijman

et al. 2020

Journal of Membrane Science

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This work presents a joint experimental and simulation campaign aimed at characterizing two nanofiltration membranes (TS80 and NF270) in the presence of a multi-ionic water solution simulating the spent regenerant of cationic ion exchange resins employed for water softening. We identified the membrane parameters, which allowed for predicting the performances through the Donnan Steric Pore Model with Dielectric Exclusion. A good agreement between model and experimental trends of rejection as a function of the applied pressure was observed (error < 15%). The analysis of trans-membrane fluxes and exclusion coefficients showed that dielectric exclusion was the crucial mechanism for the ionic partition. In fact, the lower pore dielectric constant found for TS80 justified the higher rejections to divalent cations with respect to NF270. Moreover, negative charge densities were found for both membranes, because of the high concentration of chloride ions in the feed, which likely adsorbed onto the membrane. However, it was observed that the experimental rejections did not change significantly with the feed pH. This result, in line with the minor role of the Donnan exclusion resulting from the model, suggested that the membrane performances were not much affected by the charge density at high feed ionic strengths (~1 M).

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“…Therefore, in order to evaluate the quality of beet roots for sugar production and determine the sucrose losses in molasses, it is vital to evaluate the chemical and technological characteristic of beet juice. While Noghabi et al (2011), concluded that temperature and pressure should be considered for optimization the operation conditions at the industrial scale. Chemical and technological properties of beet juice during the beet campaign (beet-processing period) are shown in Table 1.…”

Section: Chemical and Technological Characteristics Of Beet Juicementioning

confidence: 99%

Evaluation of sugar losses in beet molasses as affected by the quality of sugar beet roots

Mohamed¹,

El-Syiad

Farghly

et al. 2023

Egyptian Sugar Journal

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This study was designed to evaluate the indices that affect the quality of sugar beet root processing in relation to sugar loss in final molasses. This quality is affected by late sugar beet root harvesting and the infestation with root rots resulted in a significant increase of the inverted sugars, K, Na and α-amino-N concentrations with detrimental consequences for processing. For this purpose, samples of sugar beet molasses and sugar beet roots were taken during the processing (from two different designs of production lines) and research fields of Delta Sugar Company during different times in the 2021 and 2022 processing seasons early season, middle season and late season (from the middle of February to late March, from early April to middle of May and from the middle of May to late June, respectively).During the processing season, sucrose content in sugar beet roots declined significantly, while K, Na, amino N, inverted sugars and other ingredients accumulated in the beets, therefore, the quality of sugar beet roots degraded dramatically. The quality of sugar beet increased significantly from 74.8±0.024% to 83.8±0.024% during the season. Whereas the purity of sugar beet juice elevated significantly from 84.8±0.019 to 87.9±0.029% during the season. These findings revealed that there is a reversible relationship between the quality of sugar beet, the sugar losses percentage in beet molasses and the concentration of alpha-amino nitrogen, sodium and potassium in sugar beet. Therefore, the future needs of the processing industry could change the criteria of quality assessment.

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Effect of operating parameters on performance of nanofiltration of sugar beet press water

Cited by 16 publications

References 5 publications

Influences of Technological Parameters on Cross-Flow Nanofiltration of Cranberry Juice

Influences of Technological Parameters on Cross-Flow Nanofiltration of Cranberry Juice

Experimental and theoretical characterization of commercial nanofiltration membranes for the treatment of ion exchange spent regenerant

Evaluation of sugar losses in beet molasses as affected by the quality of sugar beet roots

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