Influence of nanoparticles on filterability of fruit-juice industry wastewater using submerged membrane bioreactor


Demirkol G. T. , DİZGE N., Acar T. O. , Mutlu Salmanlı Ö. , Tufekci N.

WATER SCIENCE AND TECHNOLOGY, cilt.76, ss.705-711, 2017 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 76 Konu: 3
  • Basım Tarihi: 2017
  • Doi Numarası: 10.2166/wst.2017.255
  • Dergi Adı: WATER SCIENCE AND TECHNOLOGY
  • Sayfa Sayıları: ss.705-711

Özet

In this study, polyethersulfone (PES) ultrafiltration membrane surface was modified with nano-sized zinc oxide (nZnO) and silver (nAg) to improve the membrane filterability of the mixed liquor and used to treat fruit-juice industry wastewater in a submerged membrane bioreactor (MBR). The nAg was synthesized using three different methods. In the first method, named as nAg-M1, PES membrane was placed on the membrane module and nAg solution was passed through the membrane for 24 h at 25 +/- 1 degrees C. In the second method, named as nAg-M2, PES membrane was placed in a glass container and it was shaken for 24 h at 150 rpm at 25 +/- 1 degrees C. In the third method, named as nAg-M3, Ag nanoparticles were loaded onto PES membrane in L-ascorbic acid solution (0.1 mol/L) at pH 2 for 24 h at 150 rpm at 25 +/- 1 degrees C. For the preparation of nZnO coated membrane, nZnO nanoparticles solution was passed through the membrane for 24 h at 25 +/- 1 degrees C. Anti-fouling performance of pristine and coated membranes was examined using the submerged MBR. The results showed that nZnO and nAg-M3 membranes showed lower flux decline compared with pristine membrane. Moreover, pristine and coated PES membranes were characterized using a permeation test, contact angle goniometer, and scanning electron microscopy.