Coupling reverse osmosis and osmotic distillation for clarified pomegranate juice concentration: Use of plasma modified reverse osmosis membranes for improved performance

ONSEKİZOĞLU BAĞCI P., Akbas M., GÜLEÇ H. A., BAĞCI U.

Innovative Food Science and Emerging Technologies, cilt.52, ss.213-220, 2019 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 52
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1016/j.ifset.2018.12.013
  • Dergi Adı: Innovative Food Science and Emerging Technologies
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.213-220
  • Anahtar Kelimeler: Juice concentrate, Membrane, Osmotic evaporation, Surface modification, Vacuum plasma
  • Trakya Üniversitesi Adresli: Evet

Özet

In this study, a low pressure nitrogen plasma (LPNP) activation was implemented to modify the surface characteristics of a commercial thin film composite (TFC) polyamide reverse osmosis (RO) membrane. The free energy of interaction (ΔG iwi ) results showed that the hydrophobic nature of untreated TFC RO membrane became considerably hydrophilic with the effect of LPNP treatment. Among various plasma powers and exposure times tested, a general decreasing trend was observed for the water contact angle with increasing plasma duration, reaching a minimum of 13.2 ± 0.8° for 90 W at 15 min. A remarkable increase in water flux of the LPNP modified RO membrane was observed throughout the RO process, which promoted higher soluble solids content (SSC) values in the concentrated juice at the same period of time with the plain one. The higher SSC values achieved by the modified RO membrane enabled 30% time-saving during further osmotic distillation process.