Full Description

In order to provide a new source of drinking water to residents of Central BrownCounty (CBCWA), Wisconsin, the Manitowoc Public Utilities (MPU) developed a project to design andconstruct a new 25 mgd submerged microfiltration (MF) plant that would draw water fromLake Michigan. The work at the WTP is one component of a joint project between MPUand the CBCWA to cost effectively bring Lake Michigan water to the region. The newMF facilities will be installed within MPU's decommissioned conventional treatmentplant, offline since 2000 after the startup of a 12 mgd pressure MF plant. The newsubmerged MF facility includes space for an ultimate 45 mgd capacity of membraneequipment with pretreatment strainers and chemical cleaning equipment all housedwithin the space of a 10 mgd conventional filter gallery. The facilities also include aswing cell, which can operate intermittently as a secondary recovery skid, reducingresiduals waste to less than 1% of plant flow during periods in which residuals must bedischarged to the sewer. Other improvements associated with the joint project include anew 4,000 foot lake intake, 28 MGD raw water pumping station, 3 MG finished waterreservoir, 25 MGD finished water pumping station, over 60 miles of transmission main,and over a dozen metering and pressure reducing stations.This paper provides interesting comparisons between the design of the pressure MFplant and the new submerged MF plant. The new submerged membrane system is inthe final stages of construction and in the initial stages of startup and testing. Includes figures.

Product Details

Edition: Vol. - No. Published: 03/01/2007 Number of Pages: 7File Size: 1 file , 1.2 MB