For the oxidation of low concentrations of NH4+-N, conventional biofilm reactors such as a rotating biological contactor encounter difficulty due to mass transport limitation of NH4+-N. Therefore, the authors have developed a novel biofilm-membrane reactor, in which biomass is fixed on the surface of rotating membrane disks to enhance NH4+-N transport into the biofilm. Three long-term bench-scale experiments were carried out and sufficient nitrification efficiency was obtained even at low levels of NH4+-N. The experimental results were evaluated in comparison with model simulation.
A novel biofilm-membrane reactor for ammonia oxidation at low concentrations
Yoshimasa Watanabe, Katsuki Kimura, Satoshi Okabe, Genzou Ozawa, Naoki Ohkuma; A novel biofilm-membrane reactor for ammonia oxidation at low concentrations. Water Sci Technol 1 July 1997; 36 (1): 51–60. doi: https://doi.org/10.2166/wst.1997.0011
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