1. Civil Engineers: Environmental Engineering Erik R. Coats, PE, Ph.D. CE 115 November 10, 2005

2. What do we do? Solve problems –Design infrastructure and systems to remedy “pollution” that is either human-caused or naturally occurring such that exposure does not cause harm More specifically: –Potable Water Treatment –Wastewater Treatment –Landfill Design –Hazardous Waste Treatment –Surface Water and Ground Water Quality

3. Water Treatment Produce safe drinking water Surface water and ground water EPA establishes minimum standards >129 contaminants regulated Inorganics Arsenic at 0.01 mg/L Microbial E. coli Cryptosporidium: Milwaukee (1993) 400,000 sick; 100 deaths Synthetic organics Man-made contaminants: we then need to remove

4. Wilsonville Water Treatment Plant Drinking Willamette River water –Industrial, agricultural, and municipal discharges –Fish deformities –Carcinogens –Teratogens: birth defects Solution: advanced physical & chemical treatment technology

5. Treatment Process

6. River Intake

7. Sedimentation

8. Ozonation

9. Granular Activated Carbon

10. Filtration

11. Water Supply Planning

12. Why Treat Wastewater? Organics – deplete oxygen Nutrients – toxic; deplete oxygen Pathogens – human contact Temperature?

13. Wastewater Treatment Reclaim water for non-potable and potable uses –Discharge to surface water –Irrigation –Industrial re-use –Wetlands reclamation Reclaim solids –Fertilizer –Plastic? http://www.wef.org/apps/gowithflow/theflo w.htm

14. Rock Creek, OR WWTP

15. Moscow, Idaho WWTP

16. Influent Wastewater

17. More Influent

18. Biological Treatment

19. Disinfection

20. Biosolids Processing

21. Final Effluent!

22. Colfax, WA WWTP

24. Plastic from Wastewater?

25. Landfills – do we deal with trash?

26. No - we design the infrastructure Waste cells Leachate collection Storm water management Gas collection

27. How much solid waste?

28. Typical Landfill

29. Landfill Liner

30. Landfill Closure

31. Composting

32. Landfill Leachate – control?

33. Landfill Bioreactor Recycle leachate – enhance biological activity Increases waste decomposition rate Increase landfill capacity Recover gas (methane) for power generation

34. Where do we work? Consulting Industry Regulatory Environmental groups Academics

35. Science background? Biology Microbiology Chemistry Biochemistry Physics

36. Thank you! Questions?