The Siemens system, which will treat water from Lake Michigan, will replace an aging conventional filtration plant at the facility, and increase the plant’s rated capacity from 21 MGD (79 MLD) to 30 MGD (113 MLD). When started up, this will be the 12th Memcor membrane system operating on Lake Michigan. CDM is the consulting engineer on the project, which is scheduled for completion in the winter of 2012.
The plant, located in this North Shore Chicago suburb, serves approximately 60,000 people. Built in 1930 and expanded twice, the facility’s treatment capacity is now at its limits. Retrofitting the plant will involve removing the roof from one of four settling basins, and installing a 30-MGD (113- MLD) membrane system in what will become the membrane process room. During construction, the existing water treatment plant will continue to operate in order to provide Highland Park’s customers with all the water they need. When this retrofit project is completed, the City will have increased its rated treatment capacity by over 40% in the space once occupied by only 25% of its coagulation/flocculation/settling process.
The City chose the Memcor submerged membrane system following a 12-month pilot study and competitive procurement process.
Siemens adds that the Memcor CS submerged membrane filtration system is suitable for retrofitting of aging drinking water plants as it offers great design flexibility, a lower life-cycle cost and compact footprint. It also provides a greater than 4-log removal of Cryptosporidium, Giardia and bacteria, over 1.5-log virus rejection and a silt density index of less than 2.0, regardless of changing feed water conditions.