The design of a new 8-million-gallon-per-day (MGD) water treatment plant for South Blount
County Utility District (SBCUD) utilized microfiltration (MF)/ultrafiltration (UF) membranes.
Several manufacturers can provide MF/UF membrane systems. However, all of these systems are
configured and operate differently. Once a membrane system is selected, future replacement of
membrane modules will be limited to the one manufacturer. The configuration of these
membrane systems also would require different building footprints to house them. Therefore, a
Request for Proposals was prepared to select a system around which to design. The selection
process included a ranking of proposals based on both economic and non-economic criteria.
Negotiations were then made with the highest ranked manufacturer to determine the final cost,
scope of supply, schedule of delivery, and future replacement guarantees. This approach allowed
SBCUD to procure a membrane system for a competitive cost and select a system that best met
their needs while providing guarantees for future membrane replacement costs. Design costs
were minimized since the membrane system was selected prior to design. Includes tables, figures.