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In response to impending regulatory requirements and increased demand for high qualitydrinking water, the City of Geneva, Illinois, saw an opportunity to construct a new water softening facility that not only met these new requirements and provided softened water for the community, butalso reflected the City's long-standing commitment to honoring and preserving itscommunity heritage and character. A conceptual study was performed to identify the best watertreatment process available for the City, concurrently with an evaluation to determine the mostsuitable location and architectural look for this new facility. In order tomeet new limits for radionuclides in drinking water, promulgated in December 2000, as well asto provide softened water for the City, the conceptual study determined that the best method oftreatment for Geneva would be membrane softening using nanofiltration (NF) or reverse osmosis(RO) membranes to remove dissolved constituents (such as calcium, magnesium, andradionuclides) from the water. The Illinois Environmental Protection Agency (IEPA) requires pilot testing of NF/ROmembranes to demonstrate effective removal of radium. In addition to the IEPA requirement,because of elevated levels of iron and manganese in the shallow well water, it was determinedthat pilot testing should be conducted to determine design and operating parameters, long termfouling potential, and the extent of pretreatment necessary to protect the membranes. To thatextent, a detailed pilot testing program was carried out to determine the design parameters for thefull scale facility. The results of the pilot program and details of the full scale facilityconstruction are presented in this paper. Includes tables, figures.

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Edition: Vol. - No. Published: 11/01/2009 Number of Pages: 24File Size: 1 file , 1.3 MB