Statistical Comparison of a Direct Filtration and a Conventional Water Treatment Facility in the Intermountain Region

摘要

More stringent EPA standards are causing many communities to search out a cost effective treatment method for reducing drinking water turbidity. Conventional processes employ flocculation, costly settling basins, and polishing filters. Recently developed mixed media filters can be kept from clogging and permit direct filtration without first passing the water through settling basins. Because of the reduced capital costs, space requirements, sludge quantities, and coagulant dosages, direct filtration is being increasingly employed at new plants around the world. The specific objectives of this research were to review the literature to determine the factors affecting the performance of direct filtration systems and to use this background in gathering time series of data on relevant parameters for comparing the performance of a direct filtration with a conventional treatment system.