Screens meet discharge permitProblem
During rains, the combined sewer system of the Detroit Water and Sewer Department discharged 20 billion gallons annually to the Detroit and Rouge Rivers. The state mandated the flows at the outfall be filtered through 1/4-inch openings and disinfected. The screens had to sustain a 10-foot differential head in 10- by 21 1/2-foot-deep channels.Solution
After a finite element analysis, the consulting engineer selected Aquascreen fine screens from Andritz Separation. Company personnel demonstrated that the design could handle extreme loads. The department installed six in-channel perforated panel traveling belt screens with 6 mm openings in the Oakwood CSO
