Biofouling Behavior on Forward Osmosis Using Vertically Aligned CNT Membrane on Alumina

Document Type: Full article

Authors

1 Tarbiat Modares University

2 Department of Chemical Engineering, Faculty of Engineering, University of Bojnord, Bojnord, Iran.

3 Chemical Engineering Department, Tarbiat Modares University, Tehran, Iran.

Abstract

Nowadays, forward osmosis (FO) with many advantages in water treatment, are so attractive for researchers and investigators that the studies are going to optimize and increase its efficiency. However one of the most controversial operating malfunctions of FO process is fouling that limits the FO global application. In the following research, vertically aligned carbon nanotube (VACNT) on alumina membrane is introduced with high water permeability and less biofouling potential in forward osmosis for seawater osmotically dilution systems. VACNT membranes were prepared via pyrolysis of polymer into the pores of alumina. The effect of the temperature of pyrolysis process on CNT’s structure are assessed which indicated crystallinity of the CNTs increase in higher pyrolysis temperature of 800 °C. A small scale setup is designed for FO analysis and measurements of biofouling, flux and the effect of osmotic pressure were measured. Furthermore, all analysis were compared with commercial TFC membrane and results demonstrated that VACNT membrane has 40% less biofouling potential and 2 times better flux results.

Keywords

Main Subjects


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