[Nitric Oxide Removal with a Fe-TiO₂/PSF Hybrid Catalytic Membrane Bioreactor]

The Fe-doped titanium dioxide (Fe-TiO₂) was prepared by the sol-gel method and was loaded on polysulfone (PSF) hollow fiber membrane. A novel Fe-TiO₂/PSF hybrid catalytic membrane biofilm reactor (HCMBfR) was investigated for nitric oxide removal, to further improve the elimination capacity. HCMBfR exhibited a good stability in the 180-day operation period, the NO removal efficiency was up to 93.2% and the maximum elimination capacity reached 167.1 g · (m³ · h)⁻1. The additional use of the biofilm to wet Fe-TiO₂/PSF membrane catalysis reactor led to the enhancement of NO removal efficiency from 59. 5% to 66% . The NO removal efficiency in the intimate coupling of Fe-TiO₂/PSF hybrid catalytic membrane and biofilm reactor ( HCMBfR) increased from 1.4% to 13% as compared to that of the membrane biofilm reactor (MBfR) only. The optimal illumination intensity, gas residence time, pH and nC/nN were 670 lx, 9 a, 6.8-7.2 and 3.7, respectively.