Fabrication of PAN/ZnO/SA nanocomposite membrane in order to fouling mitigation in a submerged membrane bioreactor

فاقد چكيده فارسي

The purpose of this study was to evaluate the anti-fouling behavior of polyacrylonitrile nanocomposite membranes in a membrane bioreactor. In this regard, the ZnO nanoparticle with anti-bacterial and sodium alginate nanoparticles with hydrophilic property were added to the polyacrylonitrile raw membrane matrix. Porosity, contact angle, the point of zero charge of synthesized nanocomposite membranes were analyzed. The membrane anti-fouling performance was also evaluated in a submerged MBR. The results showed that the porosity of PANZnO1.5SA0 nanocomposite membrane showed 8% increment rather than the raw membrane by adding zinc oxide nanoparticles to the PAN membrane. The presence of ZnO nanoparticles in the PANZnO3SA0 nanocomposite membrane also increased the membrane the point of zero charge from 5.8 to 9.6. Also, by adding zinc oxide and sodium alginate nanoparticles to the membrane, the PANZnO3SA0and PANZnO0SA8and PANZnO1.5SA8 membranes were 70%, 21% and 27.5% respectively more hydrophilic than raw membrane. Also, by adding zinc oxide nanoparticles and sodium alginate to raw membrane, the difference between initial and final water flux drops for PANZnO3SA0, PANZnO0SA8 and PANZnO1.5SA8 membranes by 39%, 11% and 48%, less than raw membrane, respectively.