Optimizing coagulation process for a low turbidity, low temperature water
Date of Original Version
This study aimed at exploring optimum coagulant dose and optimum pH for a low turbidity (0.1-3 NTU), low temperature (1-5°C) water. Coagulation of such water generally requires addition of clays for producing adequate quantities of hydro-oxide precipitate to remove colloidal matter. This work focused upon particulate and natural organic matter removal from a low turbidity water without the addition of clays. An optimum combined dose of ferric sulfate and cationic polyelectrolyte was determined at an optimum pH using jar testing apparatus and a pilot scale direct filtration plant. When compared with the conventional water filtration plant, this study concluded that by changing the full scale train to direct filtration train would not only eliminate the sedimentation basin but the cost of chemicals would also be substantially reduced. The use of color removal as a measure of natural organic matter removal in direct filtration was found to be well suited to low turbidity water.
Electronic Journal of Environmental, Agricultural and Food Chemistry
Khan, Zahiruddin, and Leon T. Thiem. "Optimizing coagulation process for a low turbidity, low temperature water." Electronic Journal of Environmental, Agricultural and Food Chemistry 7, 1 (2009): 2599-2610. https://digitalcommons.uri.edu/cve_facpubs/364