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AWWA WQTC63952

AWWA WQTC63952 Case Studies on Nitrification

Conference Proceeding by American Water Works Association, 11/01/2006

Baribeau, Helene

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This slide presentation outlines several case studies on nitrification. Within these studies, the effect of water quality is broken down into temperature, pH, chloramine residual, and Clsub2/sub:NHsub3/sub-N ratio. The effect of preventive measures involved: adjusting water quality;distribution system operational practices;decrease water age;remove sediments from pipes and reservoirs;flushing program (unidirectional, dead-ends);implement corrosion control program;frequency of fill cycles in reservoirs;free chlorination;add low doses of chlorite (ClOsub2/sub or ClOsub2/sub-);Nitrification Action Plan and monitoring.The effect of corrective measures involved: operational responses;breakpoint chlorination;entire distribution system;targeted areas;decrease water age,reservoir cycling/turnover/mixing, andreservoir draining and disinfection; flushing (unidirectional, spot, dead-ends).

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