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DOI : ,    Vol.5, No.2, 17 ~ 28, 1997
Title
Flocculation Monitoring for Water Treatment Applications
John Gregory
Abstract
After a brief survey of methods used for monitoring flocculation processes, a simple flow-through optical technique is described. This is based on measurements of light transmitted through a flowing sample and especially in fluctuations of intensity. The fluctuating signal depends on the number and size of the particles passing through the light beam and gives very useful information on particle aggregation. By using this technique in laboratory applications it is possible to derive information on the kinetics of formation and break-up of flocs in a stirred vessel. This provides much more detailed information than can be derived from the standard jar test procedure and gives greater insight into the nature of the processes involved. Essentially the same technique can also be used for flocculation monitoring and control of coagulant dosage in water treatment plants.
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