AWWA ACE65410

This powerpoint presentation begins by providing history and background information of four water utilities in the Michigan towns of Chelsea, Davison, Grand Blanc, and Saline. The drivers for membrane technology for softening included: application of new state-of-the-art technology for multi-contaminant removal; small, modular footprint would save on building costs; full automation allowed reduced staffing requirements; and, no lime sludge from conventional lime softening process. Project driving forces included: regulatory requirements achievable via membrane separation technology; capital costs were essential for project feasibility for smaller municipal utilities; and, "Turnkey Solution" was selected to meet initial budget and schedule needs in lieu of traditional "Engineered Solution" approach. Separate costs for membrane softening and the operation and maintenance of membrane softening are given, along with design criteria, membrane treatment system schematic, raw water supply, chemical pretreatment, physical pretreatment, membrane feed pumps, membrane treatment, post-treatment, concentrate disposal methods, construction, start-up and testing, operation and maintenance, and recommended improvements. Includes figures.