Cold lime softening will ...
Published by Sean Roop, Industrial and Engineering Consultants, LLC - Senior Water and Process Consultant
Cold lime softening will remove higher fluoride concentrations at the proper pH. This can be done at your Primary Clarifier using slaked lime addition to adjust to the proper pH. You will most likely need a DADMAC or PAC coagulant (dosage will vary depending on your influential quality) and maybe a very small amount of an ionic flocculant for the best clarity 0.1-0.3 ppm). CLS will improve removal of several contaminants as well; taking loading off downstream treatments. Chlorination is post the CLS. Hope this helps.