BIODIGESTER Conceptual Design Review December 7 th, 2009 EGGN 491.
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Transcript of BIODIGESTER Conceptual Design Review December 7 th, 2009 EGGN 491.
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BIODIGESTER
Conceptual Design ReviewDecember 7th, 2009
EGGN 491
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Team MembersKeano Dashkowitz Faculty Advisor:Lynlee Gerk Dr. David MunozAlima KopbayevaElliot MakuhJennifer StevensDaniel Stewart
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Clients
Contact: Maria CampMission:“Into Your Hands improves
rural communities of Uganda by developing financially sustainable solutions for affordable education.”
Contact: Bob MillerMission:“To improve the life and
environment of orphans of any race, religion or gender throughout the world.”
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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
Project Objectives
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Design Considerations
Solid Retention Time Temperature pH Dilution
– Reduce Ammonia toxicity Maintaining anaerobic state Production of Toxins
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Anaerobic Digestion
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Schematic
Ground Level
Gas Pipe
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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
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Design Criteria
Amount of biogas produced Cost Safety Sustainability Cultural Acceptance
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Storage
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Mixers
Paddle Mixer
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Mixers
Spiral Mixer
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Top
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Grinders
Placement
•Before influent pipe
•Inside influent pipe
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Shape
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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
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Decision mechanisms
Pugh Chart Decision Matrix Brain Ball 6-3-5
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Questions & Comments