Investigation of membrane fouling in an anaerobic membrane bioreactor (AnMBR) treating pharmaceutical wastewater


Kaya Y. , BACAKSIZ A. M. , Bayrak H., Vergili I. , Gonder Z. B. , Hasar H., ...Daha Fazla

JOURNAL OF WATER PROCESS ENGINEERING, cilt.31, 2019 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 31
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1016/j.jwpe.2019.100822
  • Dergi Adı: JOURNAL OF WATER PROCESS ENGINEERING

Özet

This study is focused on the fouling of flat-sheet and hollow-fiber membranes in a lab-scale anaerobic membrane bioreactor (AnMBR). A comprehensive investigation including scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDX), fourier transform infrared (FT-IR) spectroscopy, confocal laser scanning microscopy (CLSM), zeta potential, optical profilometer and contact angle, and flux modelling was presented in this study. The effect of extracellular polymeric substances (EPS) accumulated on cake-layer were also considered. The cake-layer on the flat-sheet membrane formed much more than that on the hollow-fiber membrane. The thickness of cake-layer on the flat-sheet membrane was effectively decreased by physical stripping. However, proteins indicating structures of Amide I and Amide II, and carbohydrates were observed on the stripped hollow-fiber membrane. According to the flux modelling results, the cake-layer formation and intermediate-adsorption were found as effective mechanisms on both membranes. Especially, these mechanisms were more effective for the hollow-fiber membrane due to irreversible fouling.