EFFECT OF MEMBRANE DEGUMMING CONDITIONS ON PERMEATE FLUX AND PHOSPHOLIPIDS REJECTION

Year 2017, Volume: 42 Issue: 5, 597 - 602, 19.08.2017

Aytaç Gümüşkesen , Pınar Boynueğri Fahri Yemişçioğlu

Abstract

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

MEMBRAN DEGUMMING KOŞULLARININ PERMEAT AKISI VE FOSFOLİPİDLERIN REDDEDİLMESİ ÜZERİNDEKİ ETKİSİ

Abstract

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 40^oC, 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.

Keywords

Soyayağı, Fosfolipid, PVDFmembran

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