A small community water system asked the staff at Florida Gateway College how to remove color and organic materials from the surface water system that was the drinking water supply. College personnel explained that after the source water is screened and passed through the optional steps of prechlorination and aeration, it is ready for coagulation and flocculation.In theory and at the chemical level, coagulation/flocculation is a three-step process, consisting of flash mixing, coagulation and flocculation. However, in practice in the treatment plant, there are only two steps: The water first flows into the flash mixing chamber and then enters the
