DESIGN AND APPLICATION OF MULTIMEDIA FILTERS

vious economic advantages. The problems involved in high-rate filtration, although seemingly simple, become quite complex because of large numbers of variables and variety of water qualities encountered. A number of workers have developed mathematical models that attempt to describe the filtration process, but practical applications are still limited, even for singlemedia filters. The purpose of this paper is to present a method of designing multimedia filters and to report field experience with these filters.