In this article we look at what zeta potential is and the potential role that on-line zeta potential monitoring can play in optimizing the water treatment process, specifically flocculation control. The applicability of zeta potential is illustrated via the experiences of Aurora Water, a utility responsible for the production of water treatment for the city of Aurora in Colorado, USA. One Aurora Water treatment facility is using zeta potential as both an off- and on-line tool for monitoring and controlling the water treatment process. Results show how on-line technology can reduce chemical usage costs and simplify process operation, delivering further gains in energy consumption.

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