화학공학소재연구정보센터
Journal of Chemical Technology and Biotechnology, Vol.93, No.2, 548-556, 2018
Capillary membrane bioreactor for abatement of low soluble compounds in waste gas
BACKGROUNDThe removal of problematic volatile organic compounds (VOCs) from polluted gas (toluene, iso-octane and hexane) has been investigated in a membrane bioreactor (MBR) by adapting a commercial capillary microporous polypropylene membrane. The MBR performance was measured under several operational conditions. The influence of the empty bed residence time (EBRT), the liquid velocity and the inlet concentration was evaluated. RESULTSFor toluene, it was possible to treat higher loading rates than 1600 g m(-3) h(-1) with a maximum elimination capacity (EC) of 1309 g m(-3) h(-1), removal efficiencies (RE) of approximate to 80%. However, iso-octane was poorly degraded as a single pollutant. Hexane presented lower EC values (400 g m(-3) h(-1)) than toluene. The synergistic effect of hexane degradation in two different mixtures was also considered. CONCLUSIONResults demonstrate that a commercial membrane for wastewater treatment can be adapted for biological gas treatment, becoming a potential alternative to conventional biological treatment technologies, especially for pollutants with low solubility. (c) 2017 Society of Chemical Industry