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The purpose of this paper is to describe the solution that is currently beingdeveloped in response to a water treatment capacity shortage in a First Nation(Indigenous) community in northwestern Ontario, Canada. Due to a variety ofreasons, the slow sand filtration plant at Lac La Croix First Nation, constructedin 1994, has prematurely reached capacity. The expansion options available to theFirst Nation are limited due to current fiscal constraints. In the early 1990s,during the original design process, slow sand filtration technology had beenconsidered somewhat unproven in small scale applications in cold waterconditions. As a result, a conservative filter rate of 0.12 m/hr was adopted forthe Lac La Croix design to allow for sufficient contact time. This paperdiscusses the optimization study currently being undertaken by the Project Teamto determine the effectiveness and benefit of increasing the hydraulic loadingrate (HLR) of the existing slow sand filtration process. By deferring the majorcapital expenditure that would normally occur as a result of treatment facilityexpansion, it is anticipated that this optimization project will result insignificant cost savings. Includes 6 references, table, figure.

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Edition: Vol. - No. Published: 01/01/1999 Number of Pages: 7File Size: 1 file , 130 KB