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pH Adjustment using Carbon Dioxide

Insights and Resources, Water Supply

by Ian Todhunter, P. Eng., R.V. Anderson Associates Limited


The Elgin Area Primary Water Supply System draws raw water from Lake Erie source water, which has an average pH of 8.27, which is higher than the pH required for optimum coagulation. In order to achieve optimum coagulant dose, it was necessary to separate the coagulant and pH depression chemicals.

Published in the Winter 2014 issue of OWWA Ontario Pipeline

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