Title

Evaluating the performance of slow sand filters in Northern Idaho

RIS ID

108520

Publication Details

Tanner, S. A. & Ongerth, J. E. (1990). Evaluating the performance of slow sand filters in Northern Idaho. Journal of the American Water Works Association, 82 (12), 51-61.

Abstract

Three slow sand filter plants in northern Idaho were studied to evaluate their ability to produce good quality water and to control Giardia cysts, to determine the effects of design and operating factors on treatment performance, and to assess the effectiveness of monitoring and sanitary surveys. During the one-year study, the plants were sampled weekly for measurement of turbidity, total and fecal coliforms, and heterotrophic plate count. Samples were also analyzed for Giardia cysts and particulates. Results showed that if a slow sand filter is designed and operated according to accepted standards, it should provide consistent and effective water treatment, including a reduction in the concentration of Giardia cysts

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