نوع مقاله : مقاله پژوهشی

نویسندگان

گروه علوم و صنایع غذایی، دانشکده کشاورزی، دانشگاه صنعتی اصفهان، اصفهان، ایران.

چکیده

در این تحقیق برای اولین بار، عملکرد رس سپیولیت فعال‏شده با اسید در شفاف‏سازی آب‏سیب مورد بررسی قرار گرفت. از روش آماری سطح پاسخ جهت یافتن شرایط بهینه فرایند شفاف‏سازی استفاده شد و میزان کدورت آب‏سیب به‌عنوان پاسخ در نظر گرفته شد. سپس در شرایط بهینه، کارایی سپیولیت، بنتونیت و ترکیب این عوامل شفاف‏کننده با ژلاتین و کیزل‏ژل جهت شفاف‏سازی آب‏سیب مورد ارزیابی قرار گرفت. نتایج نشان داد که افزایش غلظت رس سپیولیت از 1/0 به 05/0 درصد وزنی/ حجمی، سبب افزایش کدورت آب‏سیب شد. در دو دمای 50 و 60 درجه سانتی‏گراد، بیشترین میزان کاهش کدورت مشاهده شد و با افزایش زمان فرایند تا 7 ساعت، میزان کدورت به‌صورت منحنی درجه دوم کاهش یافت. شرایط بهینه شفاف‏سازی، غلظت رس 05/0 درصد، دمای 50 درجه‏سانتی‏گراد و زمان 7 ساعت بدست آمد. نتایج نشان داد که دو تیمار ترکیب سپیولیت- ژلاتین-کیزل‎ژل و بنتونیت- ژلاتین- کیزل‎ژل فعال‏ترین عوامل شفاف‏کننده هستند و قادرند کدورت آب‏سیب را به میزان 7/99 درصد کاهش دهند. مطالعات کینتیکی نشان داد که سرعت تغییرات در کدورت، ویسکوزیته، میزان ترکیبات فنولیک کل و رنگ طی زمان شفاف‏سازی به ترتیب از مدل های کینتیکی درجه یک، صفر، یک و صفر تبعیت می‏کنند.

کلیدواژه‌ها

Alan, N. and İşçi, S., 2014, Surface modification of sepiolite particles with polyurethane and polyvinyl alcohol. Progress in Organic Coatings, 77 (2), 444-448.
Arslanoğlu, F. N., Kar, F. and Arslan, N., 2005, Adsorption of dark coloured compounds from peach pulp by using granular activated carbon. Journal of food engineering, 68 (4), 409-417.
Bagci, P. O., 2014, Effective clarification of pomegranate juice: A comparative study of pretreatment methods and their influence on ultrafiltration flux. Journal of Food Engineering, 141, 58-64.
Balci, S., 1999, Effect of heating and acid pre-treatment on pore size distribution of sepiolite. Clay Minerals, 34 (4), 647-647.
Ceci, L. and Lozano, J., 1998, Determination of enzymatic activities of commercial pectinases for the clarification of apple juice. Food Chemistry, 61 (1), 237-241.
Chatterjee, S., Chatterjee, S., Chatterjee, B. P. and Guha, A. K., 2004, Clarification of fruit juice with chitosan. Process Biochemistry, 39 (12), 2229-2232.
Deshmukh, P. S., Manjunatha, S. and Raju, P., 2015, Rheological behaviour of enzyme clarified sapota (Achras sapota L) juice at different concentration and temperatures. Journal of food science and technology, 52 (4), 1896-1910.
Farmani, B., Haddade khodaparast, M.H., Hesari, J. and Rezaii Iraqi, E., 2006, Refining of raw sugarcane juice using bentonite: 2 - detemination of optimum quantity of gelatin, time and temperature of process with bentonite. Journal of food science and technology research, 2, 63-75.
Gao, L., Beveridge, T. and Reid, C., 1997, Effects of processing and packaging conditions on haze formation in apple juices. LWT-Food Science and Technology, 30 (1), 23-29.
Gökmen, V., Artık, N., Acar, J., Kahraman, N. and Poyrazoğlu, E., 2001, Effects of various clarification treatments on patulin, phenolic compound and organic acid compositions of apple juice. European Food Research and Technology, 213 (3), 194-199.
Gökmen, V. and Çetinkaya, Ö., 2007, Effect of pretreatment with gelatin and bentonite on permeate flux and fouling layer resistance during apple juice ultrafiltration. Journal of food engineering, 80 (1), 300-305.
Gökmen, V. and Serpen, A., 2002, Equilibrium and kinetic studies on the adsorption of dark colored compounds from apple juice using adsorbent resin. Journal of Food Engineering, 53 (3), 221-227.
Hernandez, E., Chen, C., Johnson, J. and Carter, R., 1995, Viscosity changes in orange juice after ultrafiltration and evaporation. Journal of Food Engineering, 25 (3), 387-396.
Jahed, E.; Khodaparast, M. H. H. and Khaneghah, A. M., 2014, Bentonite, temperature and pH effects on purification indexes of raw sugar beet juice to production of inverted liquid sugar. Applied Clay Science, 102, 155-163.
Kim, D. W., Kim, T. S., Jeong, Y. K. and Lee, J. K., 1992, Adsorption kinetics and behaviors of cellulase components on microcrystalline cellulose. Journal of Fermentation and Bioengineering, 73 (6), 461-466.
Koyuncu, H., Kul, A. R., Çalımlı, A., Yıldız, N. and Ceylan, H., 2007, Adsorption of dark compounds with bentonites in apple juice. LWT-Food Science and Technology, 40 (3), 489-497.
Lee, W., Yusof, S., Hamid, N. and Baharin, B. S., 2007, Effects of fining treatment and storage temperature on the quality of clarified banana juice. LWT-Food Science and Technology, 40 (10), 1755-1764.
Lee, W., Yusof, S., Hamid, N. S. A. and Baharin, B. S., 2006, Optimizing conditions for enzymatic clarification of banana juice using response surface methodology (RSM). Journal of food Engineering, 73 (1), 55-63.
Maskan, M., 2006, Production of pomegranate (Punica granatum L.) juice concentrate by various heating methods: colour degradation and kinetics. Journal of Food Engineering, 72 (3), 218-224.
Mirsaeedghazi, H., Emam-Djomeh, Z., Mousavi, S. M., Aroujalian, A. and Navidbakhsh, M., 2010, Clarification of pomegranate juice by microfiltration with PVDF membranes. Desalination, 264 (3), 243-248.
Miura, A., Nakazawa, K., Takei, T., Kumada, N., Kinomura, N., Ohki, R. and Koshiyama, H., 2012, Acid-, base-, and heat-induced degradation behavior of Chinese sepiolite. Ceramics International, 38 (6), 4677-4684.
Onsekizoglu, P., 2013, Production of high quality clarified pomegranate juice concentrate by membrane processes. Journal of Membrane Science, 442, 264-271.
Oszmiański, J. and Wojdyło, A., 2007, Effects of various clarification treatments on phenolic compounds and color of apple juice. European Food Research and Technology, 224 (6), 755-762.
Pinelo, M., Zeuner, B. and Meyer, A. S., 2010, Juice clarification by protease and pectinase treatments indicates new roles of pectin and protein in cherry juice turbidity. Food and bioproducts processing, 88 (2), 259-265.
Qiu, N., Guo, S. and Chang, Y., 2007, Study upon kinetic process of apple juice adsorption de-coloration by using adsorbent resin. Journal of food engineering, 81 (1), 243-249.
Rai, P., Majumdar, G., DasGupta, S. and De, S., 2005, Prediction of the viscosity of clarified fruit juice using artificial neural network: a combined effect of concentration and temperature. Journal of Food Engineering, 68 (4), 527-533.
Rinaldi, M., Caligiani, A., Borgese, R., Palla, G., Barbanti, D. and Massini, R., 2013, The effect of fruit processing and enzymatic treatments on pomegranate juice composition, antioxidant activity and polyphenols content. LWT-Food Science and Technology, 53 (1), 355-359.
Sabah, E. and Çelik, M. S., 2005, Sepiolite: An effective bleaching adsorbent for the physical refining of degummed rapeseed oil. Journal of the American Oil Chemists' Society, 82 (91), 911-916.
Sabah, E. and Majdan, M., 2009, Removal of phosphorus from vegetable oil by acid-activated sepiolite. Journal of Food Engineering, 91 (3), 423-427.
Sabah, E., Turan, M. and Celik, M., 2002, Adsorption mechanism of cationic surfactants onto acid-and heat-activated sepiolites. Water research, 36 (16), 3957-3964.
Suarez, M. and Garcia-Romero, E., 2012, Variability of the surface properties of sepiolite. Applied Clay Science, 67, 72-82.
Tajchakavit, S., Boye, J. and Couture, R., 2001, Effect of processing on post-bottling haze formation in apple juice. Food research international, 34 (5), 415-424.
Tastan, O. and Baysal, T., 2015, Clarification of pomegranate juice with chitosan: Changes on quality characteristics during storage. Food chemistry, 180, 211-218.
Tian, G., Wang, W., Kang, Y. and Wang, A., 2014, Study on thermal activated sepiolite for enhancing decoloration of crude palm oil. Journal of Thermal Analysis and Calorimetry, 117 (3), 1211-1219.
Turfan, Ö., Türkyilmaz, M., Yemİş, O. and Özkan, M., 2012, Effects of clarification and storage on anthocyanins and color of pomegranate juice concentrates. Journal of Food Quality, 35 (4), 272-282.
Türkyilmaz, M., Yemiş, O. and Özkan, M., 2012, Clarification and pasteurisation effects on monomeric anthocyanins and percent polymeric colour of black carrot (Daucus carota L.) juice. Food chemistry, 134 (2), 1052-1058.
Ünal, H. İ. and Erdoğan, B., 1998, The use of sepiolite for decolorization of sugar juice. Applied clay science, 12 (5), 419-429.
Vardin, H. and Fenercioǧlu, H., 2003, Study on the development of pomegranate juice processing technology: clarification of pomegranate juice. Food/Nahrung, 47 (5), 300-303.
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