New Ultrafiltration Membranes at the City of Two Rivers, WI Drinking Water Plant Operate for Two Years with No Fiber Breaks

In early 2016, the City of Two Rivers, WI began looking at replacing the hollow-fiber ultrafiltration (UF) membranes at their 3.75 MGD drinking water plant. The UF system had been in operation since 2003/2004 and, since then, the membranes had been repaired often and replaced twice due to ongoing fiber breakage and air integrity test (AIT) failures. In mid-2017, the membranes on one the five trains at the plant were replaced with a UF membrane that was guaranteed to last at least 5 years without any of the 70,000 fibers breaking. Since that time, the new membranes have not had a broken fiber and have consistently met or exceeded the permeability and effluent turbidity of the existing membranes.