3 years ago

Preparation and performance evaluation of high-density polyethylene/silica nanocomposite membranes in membrane bioreactor system

Preparation and performance evaluation of high-density polyethylene/silica nanocomposite membranes in membrane bioreactor system
In this study, in order to improve the antifouling properties of high-density polyethylene (HDPE) membrane in the membrane bioreactor (MBR) system, HDPE/SiO2 nanocomposite membrane was developed and evaluated for its physicochemical changes with different contents (0, 0.25, 0.5, and 1wt.%) of SiO2 nanoparticles (NPs). Flat sheet membranes were fabricated via thermally induced phase separation (TIPS) method and characterized by field emission scanning electron microscopy (FESEM), contact angle, energy dispersive X-ray analysis (EDX), tensile test and pure water flux. The filtration experiments and FESEM confirmed that certain dosages of SiO2 NPs (0.5wt.%) can increase the membrane porosity. Fouling analysis revealed that the presence of SiO2 NPs in the membrane matrix results in respectively 27% and more than 70% reduction in the total fouling ratio (TFR) and irreversible fouling ratio (IFR) and a little bit increase (16%) in the reversible fouling ratio (RFR). The obtained results showed high efficiencies of chemical oxygen demand (COD) removal rates like more than 95% for both membranes coupled biological filtration tests. In order to identify the most likely fouling mechanism, Hermia’s model was used and the obtained results revealed the existence of two fouling phases; in the first phase, cake filtration is the main fouling mechanism for both membranes, while complete blockage model is the prevailing fouling mechanism in the second phase.

Publisher URL: www.sciencedirect.com/science

DOI: S1369703X17302188

You might also like
Never Miss Important Research

Researcher is an app designed by academics, for academics. Create a personalised feed in two minutes.
Choose from over 15,000 academics journals covering ten research areas then let Researcher deliver you papers tailored to your interests each day.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.