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
BIODIGESTER
Conceptual Design ReviewDecember 7th, 2009
EGGN 491
Team MembersKeano Dashkowitz Faculty Advisor:Lynlee Gerk Dr. David MunozAlima KopbayevaElliot MakuhJennifer StevensDaniel Stewart
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.”
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
Design Considerations
Solid Retention Time Temperature pH Dilution
– Reduce Ammonia toxicity Maintaining anaerobic state Production of Toxins
Anaerobic Digestion
Schematic
Ground Level
Gas Pipe
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
Design Criteria
Amount of biogas produced Cost Safety Sustainability Cultural Acceptance
Storage
Mixers
Paddle Mixer
Mixers
Spiral Mixer
Top
Grinders
Placement
•Before influent pipe
•Inside influent pipe
Shape
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
Decision mechanisms
Pugh Chart Decision Matrix Brain Ball 6-3-5
Questions & Comments