Improved Performance, Prolonged Life, Reduced Costs

Abstract

This article discusses lessons learned from the operation and maintenance of the Kenosha, Wisconsin, Water Utility's 22‐mgd microfiltration plant, the largest municipal membrane facility in the world. The lessons include the importance of regular membrane integrity testing, scheduled cleaning, preventive maintenance, staff training, and financial planning. The plant uses a direct filtration application of a low‐pressure membrane technology where raw water is pumped once by low lift pumps through the process to the clearwell. No chemicals are used in the membrane treatment process prior to adding chlorine for disinfection.