1. Wastewater Treatment 1 Water Treatment: Why? zHealthful to drink zClean enough to return to the environment......usually for others downstream to use again!

2. Wastewater Treatment 2 DRINKING Water Treatment Initial Settling Alum to Coagulate, then settles again Pretreated to remove organics & microbes (Ozonate) Filtered (sand) Distribution System 3-7 Decades old

3. Wastewater Treatment 3 Why Treat Wastewater? Eutrophication

4. Downstream

5. Wastewater Treatment 5 Backyard Treatment Plant Septic Tank

6. Three Types of WWTmt

8. Communator

20. Wastewater Treatment 20 Activated Sludge (aerobic)

22. 1° Clarifyer

27. Wastewater Treatment 27 Anaerobic digestion!

33. Wastewater Treatment 33 Its All Downhill