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This paper presents the results from the first U.S. pilot study of the ACTIFLO Turbotechnology. The pilot was conducted with the assistance of the Town of Louisburg, North Carolina fromMay through August 2008. The ACTIFLO Turbo pilot unit consists of a 200 gpm (756 lpm)capacity ACTIFLO Turbo tank system, with coagulation, maturation, and settling tanks. Thematuration tank is equipped with a Turbomix stainless steel draft tube and mixer, whichprovides a condensed mixing zone for enhanced flocculation. The inclusion of the Turbomixallows for the following design improvements:reduced retention times, by as much as 50% in the coagulation tank and 50% inthe maturation tank, as opposed to the conventional ACTIFLO parameters;the elimination of the injection tank and mixer from the design;operation at a settling tank overflow rate of 32 gpm/sq. ft. (80 m/hr) and greater,instead of the typical design rate for conventional ACTIFLO drinking waterdesigns; and, reduced total system retention time of approximately 7 minutes or less.This technology has been evaluated on a pilot scale at the Louisburg Drinking Water Plantover a period of 8 weeks. The data from the Louisburg trials shows the ACTIFLOTurbo system's ability to produce effluent water turbidities of 1 NTU at settling tankoverflow rates of up to 50 gpm/sq. ft. (120 m/hr). Coagulant and polymer feed rates remainedconsistent with prior conventional ACTIFLO pilots conducted on similar source waters. TheLouisburg pilot demonstrates the ACTIFLO Turbo system's ability to produce excellentsettled water quality in a greatly reduced footprint. Includes 5 references, tables, figures.

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Edition: Vol. - No. Published: 11/01/2008 Number of Pages: 8File Size: 1 file , 1.2 MB