Filtration and Backwashing Performance of Biologically-Active Filters

摘要

The objectives of this study include determination of effluent quality ofbiological filters, comparison of biological particle detachment with non-biological particles during filter backwashing, determination of the impact of different fluidized bed expansions on bacterial detachment, impact of water wash by fluidization, air scour and chlorinated backwash on filtration performance and analysis of these experimental results in terms of a microscopic force model. The filtration and backwashing experiments were completed in a packed glass column with GAC/sand media and an indigenous bacterial population. The operation of a biological filter was simulated by using filter influent water from the nearby Water Treatment Plant with the addition of a carbon source.