Cloth media filters help boost capacity and cut backwash volumeProblem: The Portland (Indiana) Wastewater Treatment Plant had been using six granular media filter units with a design average flow of 2.35 mgd for tertiary treatment since the 1980s. The filters required daily maintenance due to valve issues, broken underdrains and loss of media. They also required excessive backwashing (about 10,000 gallons per cycle). Engineers recommended replacement with more efficient cloth media filters. With a fast-track design-build process to ensure state revolving loan funding, the project had to be completed in just over 12 months.Solution: Aqua-Aerobic Systems installed two 10-disk AquaDisk
