AWWA DSS69210

This powerpoint presentation begins by providing the study objective that includes the following: to model the biodegradation of microcystin-LR using a non-steady-state biofilm model, and compare model results with values obtained in laboratory-scale biofilters. A brief overview is provided of the following topics: Microcystin-LR; biofiltration; biofiltration simulation model; and, model parameters. Presentation conclusions indicate the following: the results of biofilm model, using estimated biofilm thickness, indicated a better agreement with the total organic carbon (TOC) experimental data than with the microcystin's data; during the ripening period, the simulation showed smaller toxin effluent concentration than the ones obtained experimentally; the higher concentration of microcystin in the effluent of the biofiltration experiment during the ripening period may be related to two factors, the low diffusivity of microcystin in the water and in the biofilm, and the large dispersion within the filter column. Includes tables, figures.