AWWA WQTC69243

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 ACTIFLO®Turbo 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.

Product Details

Edition:

Vol. - No.

Published:

11/01/2008

Number of Pages:

8

File Size:

1 file , 1.2 MB