Deansboro Water District Construction and Testing of Amended Slow Sand Filter

摘要

The Deansboro Water District was formed in 1983, taking over a water system thathad previously been run by a private company. By the early 1990's it was felt that the District should supplement its water supply for an anticipated increased demand by developing an alternative water source. A stream, that had been an earlier source, could provide the additional water. The source of this stream is a spring but, since it is essentially a surface source at the point of capture, the water would have to be filtered. An amended slow sand filter plant was considered as an energy-conserving and manpower-effective way to achieve the required treatment. The filter beds, three in number, were designed to be sand only for one, and for two to incorporate a layer of granular activated carbon. The carbon may reduce the precursors that cause the formation of byproducts of disinfection and could improve the water's appearance, taste and odor, though these are not presently a problem. Two types of carbon were used for comparison purposes.