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AWWA QTC97122
- Particle Count Investigation of Different Coagulant Performance
- Conference Proceeding by American Water Works Association, 01/01/1997
- Publisher: AWWA
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The drinking water treatment industry is facing increasing demands for improvement of finished water quality and optimization of removal of pathogens such as Giardia and Cryptosporidium. Particle counting has been recognized as an important tool for the assessment of source water quality, finished water quality and unit process performance. The Windsor Utilities Commission of Windsor, Ontario, Canada, conducted a pilot-scale study to evaluate the potential use of alternative coagulants to alum and to investigate any ensuing improvements in finished water quality. Two coagulants, CLAR ION A7 and CLAR ION A10, were compared to alum in these experiments. Particle counting was employed to monitor water quality and a particle count distribution was obtained by counting particles in eight size ranges. Preliminary findings indicated improved particle removal with the use of CLAR ION A7 and CLAR ION A10 as compared to alum, especially for particle sizes of 2-5 um and 5-10 um, with comparable turbidities.
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