Effects of Ultrafiltration Combined with Electric Field on Process Optimization, and Physiochemical Characteristics of Date Juice after Depectinization

Document Type : Research Article


1 Department of Food Science and Technology, Faculty of Pharmacy, Medical Sciences Branch, Islamic Azad University, Tehran, I.R. IRAN

2 Department of Food Technology, College of Aburaihan, University of Tehran, Tehran, I.R. IRAN

3 Biological and Agricultural Engineering Department, Texas A&M University, College Station, Texas, USA


Depectinized Date Juice (DDJ) was clarified with an ultrafiltration (UF) unit (containing PVDF-membrane with 30-40 nm pore sizes) and combined with an electric field (EF). The UF had 3 independent variables (temperature, pressure, and flow rate) respectively at [27 & 40oC], [1, 1.5, & 2 bar], and [10, 15, and 20 mL/s] levels. After applying a statistical tool, the optimized levels and affecting factors of temperature, pressure, and flow rate on the resulting permeate sequentially were 40°C & 55.23%, 1.5 bar & 43.01%, and 20mL/s & 1.76%. While the highest permeate flux of UF reached 2.5, it amplified to 5 Kg/m2h (100% increase) when it was joined with the EF at 5 V strength. Although UF permeate could recover 68% and 58% of the phenolic and antocyanin compounds of DDJ, the UF+EF processes improved these recoveries and reached 92% and 80%, respectively. Similarly, the sucrose and glucose in the permeate of UF+EF were at least 10% more than those obtained in the permeate of UF only. The redness color in retentates of DDJ after passing UF and UF+EF concentrated up to 213% and 292%, respectively.  Finally, the application of UF and UF+EF could eliminate the bacterial loads (Enterobacteriaceae, Escherichia coli, mold, and osmophilic yeast) of DDJ below the permissible levels. Overall, the combination of UF+EF could clarify the DDJ with richer bioactive compounds, more reducing sugar, brighter color, and lesser turbidity than those treated with UF only. It also produces a retentate with higher pectin content as a valuable source for making supplementary food.


Main Subjects

[1] Fathi G., Labbafi M., Rezaei K., Hamedi M., Decolorization of Iranian Date Syrup by Ultrafiltration, 15: 1361–1371 (2013).
[2] Ranasinghe M., Manikas I., Maqsood S., Stathopoulos C., Date Components as Promising Plant-Based Materials to Be Incorporated into Baked Goods— A Review, Sustain. 14: 1–29 (2022).
[3] Ridley B.L., O’Neill M.A., Mohnen D., Pectins: Structure, Biosynthesis, and Oligogalacturonide-Related Signaling, Phytochemistry, 57: (2001).
[4] Ahdno H., Jafarizadeh-Malmiri H., Development of a Sequenced Enzymatically Pre-Treatment and Filter pre-coating Process to Clarify Date Syrup, Food Bioprod. Process, 101: 193–204 (2017).
[5] Wang H.Y., Qian H., Yao W.R., Melanoidins Produced by the Maillard Reaction: Structure and Biological Activity, Food Chem. 128: 573–584 (2011).
[6] Nasehi S.M., Ansari S., Sarshar M., Removal of Dark Colored Compounds from Date Syrup Using Activated Carbon: A Kinetic Study, J. Food Eng., 111: 490–495 (2012).
[9] Shafiee S., Sharifan A. Hojjatoleslami M., The Effects of Different Methods of Date Syrup Purification on the Physicochemical Properties of Produced Date Syrup Powder, J. Food Biosci. Technol., 6: 55–60 (2016).
[10] Zolfaghari P., Payandeh N.I., Golizadeh M., Karimi A., Azar A.E.F., Decolourisation of Beet Sugar Syrup Using Activated Carbon and Glucose Oxidase Enzyme, Chem. J. Mold., 15: 54–61 (2020).
[11] Ashraf Z., Hamidi-Esfahani Z., Date and Date Processing: A Review, Food Rev. Int., 27: 101–133 (2011).
[12] Laksameethanasana P., Somla N., Janprem S., Phochuen N., Clarification of Sugarcane Juice for Syrup Production, Procedia Eng., 32: 141–147 (2012).
[13] Arhoghro E.M., Eboh A.S., Ogbomade R.S., Tule E.K., Assessment of Reproductive Hormones and Antioxidant Status of Male Rats Fed With Date Juice ( Phoenix Dactylifera ), 4421: 63–66 (2019).
[14] Qadir A., Shakeel F., Ali A., Faiyazuddin M., Phytotherapeutic Potential and Pharmaceutical Impact of Phoenix Dactylifera (Date Palm): Current Research and Future Prospects, J. Food Sci. Technol., 57: 1191–1204 (2020).
[17] Tripathi T., Kamaz M., Wickramasinghe S.R.,  Sengupta A., Designing Electric Field Responsive Ultrafiltration Membranes by Controlled Grafting of Poly (Ionic Liquid) Brush, International Journal of Environmental Research and Public Health, 17: (2020).
[18] Mameri N. et al. Electric Fields Applied in the Ultrafiltration Process, Desalination, 138: 291 (2001).
 [19] Lewandowski R., Zghal S., Lameloise M. L., Reynes M., Purification of Date Juice for Liquid Sugar Production, Int. Sugar J., 101: 125–130 (1999).
[21] Kalbasi A., Cisneros-Zevallos L., Fractionation of Monomeric and Polymeric Anthocyanins from Concord Grape (Vitis labrusca L.) Juice by Membrane Ultrafiltration, J. Agric. Food Chem., 55: 7036–7042 (2007).
[23] Farmani B., Haddadekhodaparast M.H., Hesari J., Aharizad S., Determining Optimum Conditions for Sugarcane Juice Refinement by Pilot Plant Dead-end Ceramic Micro-Filtration, J. Agric. Sci. Technol., 10: 351–357 (2008).
[24] Lotfi L., Kalbasi-Ashtari A., Hamedi M., Ghorbani F., Effects of Sulfur Water Extraction on Anthocyanins Properties of Tepals in Flower of Saffron (Crocus Sativus L), J. Food Sci. Technol., 52: 813–821 (2015).
[25]Experiment O.A. Francis F.J., Fuleki1968 (1), 33: 72–77 (1968).
[26] Hosseinian F.S., Li W., Beta, T., Measurement of Anthocyanins and Other Phytochemicals in Purple Wheat, Food Chem., 109: 916–924 (2008).
[29] Seguí L., Calabuig-Jiménez L., Betoret N., Fito P., Physicochemical and Antioxidant Properties of Non-Refined Sugarcane Alternatives to White Sugar, Int. J. Food Sci. \& Technol., 50: 2579–2588 (2015).
[31] Nematzadeh M., Shokrollahzadeh S., Samimi A., Mohebbi-Kalhori D., Synergistic Effect of Amino-Acids and Metal Salts as Draw Solutions to Enhance the Performance of Fertilizer-Drawn Forward Osmosis. Environ. Sci. Water Res. Technol., 6: 3121–3131 (2020).
[32] Jin X., Jawor A., Kim S., Hoek E.M.V., Effects of Feed Water Temperature on Separation Performance and Organic Fouling of Brackish Water RO Membranes, Desalination, 239: 346–359 (2009).
[33] Nematzadeh M., Samimi A., Shokrollahzadeh S., Mohebbi-Kalhori D., Bentazon Removal from Aqueous Solution by Reverse Osmosis; Optimization of Effective Parameters Using Response Surface Methodology, Adv. Environ. Technol., 5: (2019).
[34] Nematzadeh M., Samimi A. Shokrollahzadeh S., Application of Sodium Bicarbonate as Draw solution in Forward Osmosis Desalination: Influence of Temperature and Linear Flow Velocity, Desalin. Water Treat., 57(44): 20784-20791 (2016).
[35] Nematzadeh M., Samimi A., Mohebbi-Kalhori D., Shokrollahzadeh S., Bide Y., Forward Osmosis Dewatering of Seawater and Pesticide Contaminated Effluents Using the Commercial Fertilizers and Zinc-Nitrate Blend Draw Solutions, Sci. Total Environ., 820: 153376 (2022).
[36] Icier F. Ilicali C., The Effects of Concentration on Electrical Conductivity of Orange Juice Concentrates During Ohmic Heating, Eur. Food Res. Technol., 220: 406–414 (2005).
[37] de Bruijn J., Venegas A., Borquez R., Influence of Crossflow Ultrafiltration on Membrane Fouling and Apple Juice Quality, Desalination, 148: 131–136 (2002).
[39] Aguilar-Rosas SF, Ballinas-Casarrubias ML, Nevarez-Moorillon GV, Martin-Belloso O, Ortega-Rivas E., Thermal and Pulsed Electric Fields Pasteurization of Apple Juice: Effects on Physicochemical Properties and Flavour Compounds, Journal of Food Engineering, 83(1): 41-6 (2007).
 [40] Al-Farsi M., Alasalvar C., Morris A., Baron M., Shahidi F., Comparison of Antioxidant Activity, Anthocyanins, Carotenoids, and Phenolics of Three Native Fresh and Sun-Dried Date (Phoenix Dactylifera L.) Varieties Grown in Oman, J. Agric. Food Chem., 53: 7592–7599 (2005).  
[41] Mercali G.D., Schwartz S., Marczak L.D.F., Tessaro I.C., Sastry S., Ascorbic Acid Degradation and Color Changes in Acerola Pulp During Ohmic Heating: Effect of Electric Field Frequency, J. Food Eng., 123: 1–7 (2014).
[42] Castro‐Muñoz R., Fíla V., Barragán‐Huerta B.E., Yáñez‐Fernández J., Piña‐Rosas J.A., Arboleda‐Mejía J., Processing of Xoconostle fruit (Opuntia Joconostle) Juice for Improving its Commercialization Using Membrane Filtration, Journal of Food Processing and Preservation,  42(1): e13394,(2018).
[43] Atchaya P.T., Anandakumar S., Kirankumar M., Effect of Pulsed Electric Field on Physicochemical Parameters of Membrane Processed Sugarcane Juice, The Pharma Innovation Journal, (2022).
[45] Jafarnia A., Soodi M., Shekarchi M., Determination and Comparision of Hydroxymethylfurfural in Industrial and Traditional Date Syrup Products, Iran. J. Toxicol., 10(5): (2016).