WWTP UPGRADE AND EXPANSION Metcalf & Eddy Design Competition – Problem 1

1. WWTP UPGRADE AND EXPANSIONMetcalf & Eddy Design Competition – Problem 1 Rose-Hulman Environmental April 22, 2008

2. Project Members

3. Overview • Client & Liaison • Project Description • Project Requirements • Project Approach • Design Solutions • Summary

4. Client & Liaison • Metcalf & Eddy • Est. 1907 • Environmental Engr. Consultants • Global Services • Liaison • Mr. Joe Thais, P.E., BCEE • Indianapolis

5. Project Description • Location: • New Jersey • Established: • 1970s • WW Source: • Predominantly Domestic • Consent Order: • Reduce Nitrogen • Concerns about Water Shortage: • Beneficial Reuse

6. Wastewater Enters Stream as: Organics & Ammonia O2 O2 O2 O2 O2 O2 O2 O2 O2 O2 O2 O2 O2 O2 O2

7. Project Description

8. Project Requirements CapAVG BOD TN TSS ------- 155 32 152 12 15 27.5 13 16 <5 <5 <5 [MGD] [mg/L] [mg/L] [mg/L]

9. Project Constraints • Utilize Existing Facilities • Land Requirements • Two (2) Additional Secondary Clarifiers • Three (3) Additional Aeration Reactors • Consider Auxiliary Facilities

10. Codes and Regulations Process Configuration Options Total Suspended Solids Removal Economic Analysis Assessment of Configurations Sensitivity Analysis Project Approach

11. Codes and Regulations • New Jersey Administrative Code 7:14A-23 • Recommended Standards for Wastewater Facilities (10 State Standards) • Reclaimed Water for Beneficial Reuse, NJDEP Technical Manual

12. Configuration Options

13. Schematic of Current Process Secondary Clarifier Aerobic Return Activated Sludge Waste Activated Sludge

14. Modified Ludzack-Ettinger Process Mixed-liquorreturn SecondaryClarifier Aerobic Anoxic ReturnActivatedSludge Waste Activated Sludge

15. Step-Feed Preanoxic Process SecondaryClarifiers Influent Aerobic Anoxic Aerobic Anoxic Aerobic Anoxic ReturnActivatedSludge Waste Activated Sludge

16. Bardenpho Four-Stage Process Internal Sludge Recycle Secondary Clarifier Anoxic Aerobic Anoxic Aerobic Return activated sludge Waste Activated Sludge

17. Modified Ludzack-Ettinger Process Activated Sludge to Secondary Clarifiers R.A.S. I.S.R. Influent Legend = Anoxic (oxygen-deficient) zone = Aerobic (oxygen-rich) zone

18. Step-Feed Preanoxic Process Activated Sludge to Secondary Clarifiers R.A.S. Influent Legend = Anoxic (oxygen-deficient) zone = Aerobic (oxygen-rich) zone

19. Bardenpho Four-Stage Process Activated Sludge to Secondary Clarifiers R.A.S. I.S.R. I.S.R. Legend Influent = Anoxic (oxygen-deficient) zone = Aerobic (oxygen-rich) zone

20. TSS Removal Tertiary Treatment Deep-Bed Sand Filter

21. Economic Analysis Long Term Costs Operation Maintenance Life-Cycle Costs • Capital Costs • Labor • Materials • Equipment

22. Assessment of Processes Decision Matrix Criteria

23. Assessment of Processes

24. Sensitivity Analysis • Variations in Kinetic Parameters • Maximum Specific Growth Rate • Half-Velocity Constant • Yield Coefficient • Endogenous Decay Coefficient • N & BOD concentrations • Criteria

26. Sensitivity Analysis Pilot Plant Study

27. Facility Plan

28. Summary • Upgrade and Expansion • Meeting Removal Limits • Modified Ludzack-Ettinger • Deep-bed sand filter

29. Modified Ludzack-Ettinger Process Activated Sludge to Secondary Clarifiers R.A.S. I.S.R. Influent Legend = Anoxic (oxygen-deficient) zone = Aerobic (oxygen-rich) zone

30. Step-Feed Preanoxic Process Activated Sludge to Secondary Clarifiers R.A.S. Influent Legend = Anoxic (oxygen-deficient) zone = Aerobic (oxygen-rich) zone

31. Bardenpho Four-Stage Process Activated Sludge to Secondary Clarifiers R.A.S. I.S.R. I.S.R. Legend Influent = Anoxic (oxygen-deficient) zone = Aerobic (oxygen-rich) zone

32. Project Description

33. Schematic of one Deep-Bed Sand Filter = Backwash trough

34. Assessment of Processes

35. Summary BOD Organic Waste + O2 Cell Mass + Energy Nitrogen [NH4+,NO3-] + CO2 Algae Growth + O2 Dead Algae + O2 Cell Mass + Energy