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BIODIGESTER Conceptual Design Review December 7 th , 2009 EGGN 491

BIODIGESTER Conceptual Design Review December 7 th , 2009 EGGN 491. Team Members Keano Dashkowitz Faculty Advisor: Lynlee Gerk Dr. David Munoz Alima Kopbayeva Elliot Makuh Jennifer Stevens Daniel Stewart. Contact: Maria Camp Mission:

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BIODIGESTER Conceptual Design Review December 7 th , 2009 EGGN 491

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  1. BIODIGESTER Conceptual Design Review December 7th, 2009 EGGN 491

  2. Team Members Keano Dashkowitz Faculty Advisor: Lynlee Gerk Dr. David Munoz Alima Kopbayeva Elliot Makuh Jennifer Stevens Daniel Stewart

  3. Contact: Maria Camp Mission: “Into Your Hands improves rural communities of Uganda by developing financially sustainable solutions for affordable education.” Contact: Bob Miller Mission: “To improve the life and environment of orphans of any race, religion or gender throughout the world.” Clients

  4. Masaka, Uganda

  5. Chihuahua, Mexico

  6. Project Objectives Design biodigester system to provide • Gas for cooking fuel • Fertilizer for crops • Look at community and residential size units • Increase sustainability and use of green energy

  7. Design Considerations • Solid Retention Time • Temperature • pH • Dilution • Reduce Ammonia toxicity • Maintaining anaerobic state • Production of Toxins

  8. Anaerobic Digestion

  9. Schematic Gas Pipe Ground Level

  10. Concept Variants • Design Variables • Tank dimensioning and geometry • Hydraulic residence time is needed to be long enough for methane formers to grow • Cover material and type • Anaerobic is necessary • Mixer use and type • 10%-15% increase of gas • Grinder use and placement • Storage unit possibilities • Effluent of gas and fertilizer • Gas burn-off mechanism • Safety reasons

  11. Design Criteria • Amount of biogas produced • Cost • Safety • Sustainability • Cultural Acceptance

  12. Storage

  13. Mixers Paddle Mixer

  14. Mixers Spiral Mixer

  15. Top

  16. Grinders • Placement • Before influent pipe • Inside influent pipe

  17. Shape

  18. Patent Research • Earliest Related US Patent: 1920 • Interesting Patents • US Patent #3,981,803 (September 21, 1976) • Basic Bio-digester • US Patent #4,100,023 (July 11, 1978) • Four-chambered Bio-digester • US Patent #4,374,199 (February 15, 1983) • Bio-digester with Magnetic Field • US Patent #6,361,694 (March 26, 2002) • Improved Efficiency with Propane Injections

  19. Decision mechanisms • Pugh Chart • Decision Matrix • Brain Ball • 6-3-5

  20. Questions & Comments

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