Abstract
Continuous fluidized bed bioreactor packed with activated carbon and cellulose as a carrier was used to evaluate the removal efficiency of blue-green alga, Phormidium tenue and its metabolite, 2-methylisoborneol (2-MIB).
The removals of P. tenue and total 2-MIB (including intracellular and dissolved 2-MIB) by fluidized bed biological activated carbon (FBA) were 89.1% and 68% at 20°C for 7 days, while those of them by fluidized bed biological cellulose (FBC) were 85.3% and 57% under the same condition. FBA showed relatively higher removal than FBC.
Protozoan, Monas sp. on biofilm was closely correlated with the ingestion of viable cells of P. tenue, and its dissolved 2-MIB was found to be efficiently assimilated by the aggregated bacteria on the biofilm. It was indicated that the removal difference of 2-MIB by continuous fluidized bed bioreactor was dependent on the kind of carriers.
