抄録
The adsorption and bioregeneration of biological activated carbon (BAC) were investigated using denitrifying fluidized bed reactors. Laboratory scale column packed with granular activated carbon (GAC) and artificial light aggregate (ALA) were fed with nitrate and saccharose in various modes. Saccharose was fed as a single carbon source and hydrogen donor for denitrifying bacteria. The empty bed contact time (EBCT) of the continuous feed experiments was 40 minutes. Adsorption capacity for BAC were 73.7 to 71.6% of that for GAC, and adsorption rate for BAC was 30.4% of that for GAC. The amount of bioregeneration for BAC was higher than that of desorption calculated from adsorption isotherm. The adsorption isotherm is not as same as desorption isotherm if the bulk concentration is lower than 30mg/L.
