Design, Construction and Implementation of a Pilot Scale Anaerobic Digester at the University of Missouri-Columbia’s Swine Teaching and Research Farm
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Proceedings available at: Animal manure is often utilized by the American agriculture industry as fertilizer without considering the potential energy production. It is well established that on-farm anaerobic digestion (AD) can be effective in providing energy, reducing greenhouse gas emissions, and controlling air and water pollutions. Knowledge of the ADs on biogas production, digested and stored manure nutrients, and air emissions must reach parties of interest. A modular, pilot-scale, mesophilic AD system is being installed for the new swine finishing facility at University of Missouri-Columbia Research Farm.
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Design, Construction and Implementation of a Pilot Scale Anaerobic Digester at the University of Missouri-Columbia’s Swine Teaching and Research Farm
- 1. Design, Construction and Implementation of a Pilot Scale Anaerobic Digester at the University of Missouri’s Swine Teaching and Research Farm By: Brandon Harvey Research Assistant, Agricultural Systems Management Teng Lim Assistant Professor, Agricultural System Management Kevin Rohrer Engineer, Martin Machinery
- 2. Purpose of Project • Establish a pilot scale, on-farm anaerobic digester – Potential Renewable Energy Production – Manure Management – Economic Viability – Odor Control
- 3. Purpose of Project • Research will provide information for small to medium sized farms seeking: – Viable energy alternatives – Practical manure management practices – Air quality improvements
- 4. University of MO-Swine Farm Located approx. 5 miles from campus Consist of 2 barns -Research -Teaching West - trailer court East- several homes South- University Farm North- Undeveloped land
- 5. Construction Details • Finishing Barns • Valve Control & Manhole • Dual Tank Design • Heat Exchanger • Gas Systems • Water Heaters • Control Panels
- 6. Finishing barns Chopper pump Scraper system Existing Lagoon Modified water heater Back-up natural gas heater Positive displacement pumpManhole Mixing tank Digester 2 Digester 1 Biogas Bladder Condensate Trap Shelter Flare Valve Control Box Radiant Heat Pressure relief Flow meter Mixing tank Iron Sponge Heat Exchanger Anaerobic Digester System
- 7. Finishing barns Finishing Barns • 136’*42’ finishing barn • 85 Hogs per room (50-250 lbs.) • 1.1 gallon/day manure per hog • 8’ deep pit • Plug flow system
- 8. Finishing barns Chopper pump Scraper system Existing Lagoon Modified water heater Back-up natural gas heater Positive displacement pumpManhole Mixing tank Digester 2 Digester 1 Biogas Bladder Condensate Trap Shelter Flare Valve Control Box Radiant Heat Pressure relief Flow meter Mixing tank Iron Sponge Heat Exchanger Anaerobic Digester System
- 9. Valve Control & Manhole Chopper pump Manhole Valve Control Box
- 10. Finishing barns Chopper pump Scraper system Existing Lagoon Modified water heater Back-up natural gas heater Positive displacement pumpManhole Mixing tank Digester 2 Digester 1 Biogas Bladder Condensate Trap Shelter Flare Valve Control Box Radiant Heat Pressure relief Flow meter Mixing tank Iron Sponge Heat Exchanger Anaerobic Digester System
- 11. Digester • 3, 2500 gallon reinforced fiberglass tanks • Flexibility: • Single stage two-stream parallel replication • Dual stage single-stream experiment Positive displacement pump Digester 2 Digester 1 Heat Exchanger Mixing tank
- 12. Fiberglass Tanks • Digester Tank – Reinforced fiberglass – 2500 gal – Heating tubes – Nozzle mixer – Anti-foaming sprayer
- 13. Finishing barns Chopper pump Scraper system Existing Lagoon Modified water heater Back-up natural gas heater Positive displacement pumpManhole Mixing tank Digester 2 Digester 1 Biogas Bladder Condensate Trap Shelter Flare Valve Control Box Radiant Heat Pressure relief Flow meter Mixing tank Iron Sponge Heat Exchanger Anaerobic Digester System
- 15. Gas Bladder •Biogas rated plastic •12’*15’*5’ inflated •Housed in wooden structure •Weighted to maintain line pressure
- 16. Finishing barns Chopper pump Scraper system Existing Lagoon Modified water heater Back-up natural gas heater Positive displacement pumpManhole Mixing tank Digester 2 Digester 1 Biogas Bladder Condensate Trap Shelter Flare Valve Control Box Radiant Heat Pressure relief Flow meter Mixing tank Iron Sponge Heat Exchanger Anaerobic Digester System
- 17. Water Heaters Biogas water heater Back-up natural gas heater •1 Hog produces 2000 BTU of methane per day •2000 BTU*170 hogs= 340,000 BTU/40000 = 8.5 hrs. •Natural gas to supplement when needed
- 18. Control System
- 19. Control Panels Control Panel w/ touch screen VFD controllers on reverse side
- 20. Greenhouse
- 21. What was Learned • Design/ Implementation: –Complex –Time Consuming • Significant Consideration: –Barn manure capacity –Maintaining manure freshness/ solids content –Project management
- 22. Future Plans • Currently – Awaiting startup (May 1, 2013) – Awaiting manure VSS test to determine loading rate – Awaiting system test trails
- 23. Future Plans • Improved design efficiency of heat-exchanger • Effects of feedstock characteristics • Co-digestion • Feedstock pre- treatment on biogas production • Characterizing greenhouse gas emissions from untreated manure and AD- treated manure
- 24. Summary • Purpose of Project • Project Design/Construction • What was learned • Future Plans
- 25. Acknowledgements MU- College of Agriculture, Food and Natural Resources MU- Commercial Agriculture Program Dr. Tim Safranski Dr. Joe Zulovich University Field Operations
- 26. Questions?