The third video of the series, follows how water is treated throughout the treatment process. Reviewing primary clarification of insoluble BOD and other settleable material, biological treatment, secondary clarification, tertiary filtration, phosphorus removal, denitrification, disinfection and discharge. An introduction to wastewater treatment unlike any other out there. Whether you don’t know the first thing about what happens when you flush the toilet, or you’re an engineer or an operator with 20 years under your belt, there is certainly something in this video series for you. These videos take a holistic approach to the treatment process, and first answer WHY we are treating what we treat, and only then going over HOW we treat it, in a way that anyone can understand.