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Accelerated Landfill Energy Recover Technology

Accelerated Landfill Energy Recover Technology. Dr. Te-Yang Soong, PhD, PE CTI and Associates, Inc. Wixom, Michigan. Outline. Background Example Project Demonstrated Benefits Hypothetical Project at Army Installations Conclusion. Outline. Background Example Project

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Accelerated Landfill Energy Recover Technology

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  1. Accelerated Landfill Energy Recover Technology Dr. Te-Yang Soong, PhD, PE CTI and Associates, Inc. Wixom, Michigan

  2. Outline • Background • Example Project • Demonstrated Benefits • Hypothetical Project at Army Installations • Conclusion

  3. Outline • Background • Example Project • Demonstrated Benefits • Hypothetical Project at Army Installations • Conclusion

  4. Background • Landfill gas (50% CO2 and 50% CH4) is created as Municipal solid waste (MSW) decomposes in a landfill • MSW landfills are responsible for 17% of human-related CH4 emissions in the U.S. • At the same time, CH4 emissions from landfills represent a lost opportunity to capture and use as a significant energy resource XD Report

  5. Basic Chemistry Cellulose Hemicellulose XD Report

  6. Concerns • It takes decades (even centuries) for waste to decompose in traditional landfills (“dry tombs”) • Extensive monitoring / maintenance is required • Long-term liability and financial burden • A concern to today’s operators and a problem to future generations • Bioreactor landfills – A modern-day solution XD Report

  7. Fall 1998 Fall 1990 8 years in a “dry tomb” landfill Wastes in dry tombs…

  8. Long-Term Liability (e.g., cover failure) XD Report

  9. Bioreactor Landfills • Optimizing moisture and other environmental conditions to stimulate waste decomposition • Organic wastes in landfills can be rapidly degraded/ made less hazardous • Landfill gas can be generated rapidly – more feasible as a renewable energy source • Waste volume can also be reduced more rapidly – offering landfill extended service life

  10. Bioreactor Landfills

  11. Septage Bioreactor Landfills • Using septage as an augmentation agent • Why septage? • Readily available in many communities • Typically unwelcomed by WWTP • Land application leads to surface water contamination • Promotes organic decomposition through • Moisture addition • Microbial seed addition • Nutrient addition • pH regulation

  12. Outline • Background • Example Project • Demonstrated Benefits • Hypothetical Project at Army Installations • Conclusion

  13. Septage receiving Septage Bioreactor

  14. Septage Receiving Odor control Processing Underground holding Unloading

  15. Septage Processing Solid Removal Flowmeter Rock Trap Grinder

  16. Septage Processing Solid Liquid

  17. Septage receiving Septage storage Septage Bioreactor

  18. Septage Transmission

  19. Separation / Storage Liquid Storage Sludge Storage

  20. Septage Holding Tank Winterization Insulation tarps Heating blankets

  21. Septage receiving Septage storage Septage Bioreactor

  22. Septage Injection Manifold

  23. Septage Injection Lines

  24. Landfill Gas Collection

  25. Gas Extraction Manifold

  26. Outline • Background • Example Project • Demonstrated Benefits • Hypothetical Project at Army Installations • Conclusion

  27. Extended Site Life Delay of closure cost ( $34M) by 6 years!

  28. Increased LFG Production 8% of total waste is producing nearly 40% of total LFG!

  29. LFG-to-Electricity Engine Room

  30. Accelerated Stabilization

  31. Accelerated Stabilization

  32. Outline • Background • Example Project • Demonstrated Benefits • Hypothetical Project at Army Installations • Conclusion

  33. Hypothetical Project (20-year)

  34. Hypothetical Project (20-year)

  35. Hypothetical Project (20-year)

  36. Teaming / Funding Outlook • Municipalities have access to low interest rate (2.5%) State Revolving Fund (SRF) loans to complete drinking/ wastewater improvement projects. • The CWSRF typically don’t fund a landfill project. However, since the septage bioreactor landfill project will eliminate run-off due to land application of septage and reduce the need to treat septage at local wastewater treatment facilities, funding can be granted.

  37. Teaming / Funding Outlook • Partnering municipalities can implement similar projects to provide solutions for ongoing groundwater contamination issues, help increase site life, or generate additional renewable energy production. • Since payback on the loan is over 20 years, municipalities are offered a way to generate additional cash flow through renewable energy sales, and fund the capital expense over time – a win-win situation.

  38. Outline • Background • Example Project • Demonstrated Benefits • Hypothetical Project at Army Installations • Conclusion

  39. Conclusion • Renewable energy source • Clean water, clean air and land preservation • Revenue via LFG, septage, volume recovery and cost avoidance • Key operations are field-verified • Sustainable / economical technology ready to be transferred

  40. Thank You! Te-Yang Soong, PhD, PE CTI and Associates, Inc. tsoong@cticompanies.com

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