Aytaç Gümüşkesen, Pınar Boynueğri, Fahri Yemişçioğlu

MEMBRAN DEGUMMING KOŞULLARININ PERMEAT AKISI VE FOSFOLİPİDLERIN REDDEDİLMESİ ÜZERİNDEKİ ETKİSİ

Bu çalışmanın amacı; ters osmos/ultrafiltrasyon modülü kullanılarak soya yağına uygulanan degumming işleminde polyvinylidene fluoride (PVDF) membranın performansının incelenmesidir. Membran degumming işlem koşullarının (sıcaklık, membran basıncı, besleme hızı, hacimsel konsantrasyon faktörü) permeat akısı ve fosfolipitlerin reddedilme yüzdesi üzerindeki etkisi istatistiksel olarak incelenmiştir. Membran basıncının ve hacimsel konsantrasyon faktörünün permeat akısı üzerindeki etkisi istatistiksel olarak önemli bulunmuştur (P<0.05).. Membran sıcaklığının 40oC, membrane basıncının 20 bar, besleme hızının 9L/dak ve hacimsel konsantrasyon faktörünün 5 olduğu işlem koşullarında fosfolipidlerin reddedilme yüzdesi 86.1, permeat akısı ise 11.19L/m2.s olarak belirlenmiştir. Ayrıca PVDF membranın akı davranışı da incelenmiştir. Permeat akısının işlem süresi ile değişimi; akının sürekli düşme gösterdiği birinci bölge ve akının sabit kaldığı ikinci bölge olmak üzere iki bölgede tanımlanmıştır. Düşen akı bölgesi 2. dereceden polinomiyal, sabit akı bölgesi doğrusal, tüm işlem için logaritmik model geliştirilmiştir.

Anahtar Kelimeler:

Soyayağı, Fosfolipid, PVDFmembran

EFFECT OF MEMBRANE DEGUMMING CONDITIONS ON PERMEATE FLUX AND PHOSPHOLIPIDS REJECTION

The objective of this study was to investigate the performance of PVDF membrane in degumming of undiluted crude soybean oil by using reverse osmosis/ultrafiltration module. The effects of membrane degumming conditions including temperature, membrane pressure, feed velocity, and volumetric concentration factor on permeate flux and phospholipids rejection were evaluated statistically. The effect of membrane pressure and volumetric concentration factor on the permeate flux was found to be statistically significant (P<0.05). An 86.1 % rejection of phospholipids and a permeate flux of 11.19 L/m2.h were achieved at 400C, 20 bar pressure, 9L/min feed velocity and 5 volumetric concentration factor. The flux behavior of PVDF membrane was also studied. Behavior of permeate flux with process time showed two separate regions namely; falling permeate flux region and constant permeate flux region. A second degree polynomial relationship was observed during falling permeate flux region; whereas a linear dependency was set for constant permeate flux region. A logarithmic equation was obtained when total process behavior was examined.

Keywords:

Soybean oil Phospholipids, PVDFmembrane, Ultrafiltration,

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Referans1 Akin O., Temelli F., Köseoğlu S. (2012). Membrane applications in functional foods and nutraceuticals. Crit. Rev. Food Sci. and Nutrition 52(4):347-371, doi:10.1080/10408398.2010.500240
Referans2 Araki M.S., Coutinho C.M., Gonçalves L.A.G., Viotto L.A. (2010). Solvent permeability in commercial ultrafiltration polymeric membranes and evaluation of the structural and chemical stability towards hexane. Sep.Purif.Technol. 71:13-21, doi:10.1016/j.seppur.2009.10.005
Referans3 Firman, L.R., Ochoa N.A., Marchese J., Pagliero C.L. (2013). Deacidification and solvent recovery of soybean oil by nanofiltration membranes. J.Membr.Sci. 431:187-196, doi:10.1016/j.memsci.2012.12.040
Referans4 IUPAC (1982). Standard Methods for the Analysis of Oils, Fats and Derivatives. International Union of Pure and Applied Chemistry (IUPAC). Scientific Publications, London.
Referans5 Lin L., Rhee K.C., Koseoglu S.S. (1997). Bench-scale membrane degumming of crude vegetable oil: Process optimization. J.Membrane Sci. 134:101-108.
Referans6 Manjula S., Subramanian R. (2006). Membrane technology in degumming, dewaxing, deacidifying, and decolorizing edible oils. Crit.Rev.Food Sci. 46(7): 569-592, doi:10.1080/10408390500357746
Referans7 Manjula S., Nebetani H., Subramanian R. (2011). Flux behavior in a hydrophobic dense membrane with undiluted and hexane-diluted vegetable oils. J.Membrane Sci. 366:43-47, doi:10.1016/j.memsci.2010.09.041
Referans8 Niazmand R, Razavi SMA, Farhoosh R. (2015). Colloid-enhanced ultrafiltration of canola oil: Effect of process conditions and MCO on flux, fouling and rejections. J.Food Processing and Preservation, 39:292-300, doi:10.1111/jfpp.122232
Referans9 Ochoa N., Pagliero C., Marchese J., Mateea M. (2001). Ultrafiltration of vegetable oils degumming by polymeric membranes. Seperation Purification Technology,22-23: 417-422.
Referans10 Pagliero C, Ochoa N, Marchese J, Mattea M (2001) Degumming of crude soybean oil by ultrafiltration using polymeric membranes. J.Am.Oil Chem.,78(8):793-796.
Referans11 Pagliero C., Ochoa N.A., Martino P., Marchese J. (2011). Separation of sunflower oil from hexane by use of composite polymeric membranes. J.Am.Oil Chem.Soc.88(11):1813-1819, doi:10.1007/s11746-011-1839-3
Referans12 Penha F.M., Rezzadori K., Proner M.C., Zin G., Fogaça L.A., Petrus J.C.C., De Oliveira V., Di Luccio M. (2015). Evaluation of permeation of macauba oil and n-hexane mixtures through polymeric commercial membranes subjected to different pre-treatments. J.Food Eng. 155:79-86, doi:10.1016/j.jfoodeng.2015.01.020
Referans13 Roy B., Dey S., Sahoo G.C., Roy S.N., Bandyopadhhyay S. (2014). Degumming, dewaxing and deacidification of rice bran oil-hexane miscella using ceramic membrane: Pilot plant study. J.Am.Oil Chem.:1453-1460, doi:10.1007/s11746-014-2473-7
Referans14 Sehn G.A.R., Gonçalves L.A.G., Ming C.C. (2016). Ultrafilration-based degumming of crude rice bran oil using a polymer membrane. Grasas y Aceites, 67(1), doi:10.3989/gys.0498151
Referans15 Ulusoy B.O., Tur E., Akdogan E., Mutlu M. (2014). Plasma polymerization modified polyvinylidene fluoride (PVDF) membrane development and characterization for degumming of soybean oil. J.Am.Oil Chem.91:1813-1822, doi:10.1007/s11746-014-2522-2
Referans16 Vaisali C., Charanyaa S., Belur P.D., Regupathi I. (2015). Refining of edible oils: a critical appraisal of current and potential technologies. Int.J.FoodSci.Technol. 50:13-23, doi:10.1111/ijfs.12657