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LAWRENCE, KANSAS: DETAILED DESIGN ISSUES FOR A BALLASTED FLOCCULATION SYSTEM

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The Lawrence Wastewater Treatment Plant (WWTP) is being expanded and improved to accommodate the City's growth, maintain compliance with new regulatory requirements, and meet facility rehabilitation needs up to the design year 2020. The expansion includes excess flow treatment facilities for projected peak flows during storm events. To accommodate the projected storm flows; the excess flow facilities will consist of a ballasted flocculation system. During the design of the ballasted flocculation system, several design issues had to be resolved, including verification of chemical dosages to be used, comparison of the performance of liquid versus dry polymer, provisions for screening and grit removal, and performance testing. In addition, the design had to consider current local codes and guidelines for Fire Protection in Wastewater Treatment Collection Facilities. This presentation will discuss jar test results, performance of liquid versus dry polymer, performance test requirements, and several issues associated with the design of the ballasted flocculation system at the Lawrence WWTP.
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Document Type: Research Article

Publication date: 2001-01-01

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