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The Flour Pot Bakery Waste Audit & Biogas Potential

The Flour Pot Bakery Waste Audit & Biogas Potential. Danielle Keeter Bioenergy Summer School Internship 2009. The Flour Pot Bakery’s stand at the Haile Village Farmer’s Market. The Inspiration for this Project. Ryan Graunke’s paper “Food and Fuel: Biogas Potential at Broward Dining Hall”

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The Flour Pot Bakery Waste Audit & Biogas Potential

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  1. The Flour Pot BakeryWaste Audit & Biogas Potential Danielle Keeter Bioenergy Summer School Internship 2009 The Flour Pot Bakery’s stand at the Haile Village Farmer’s Market

  2. The Inspiration for this Project • Ryan Graunke’s paper “Food and Fuel: Biogas Potential at Broward Dining Hall” • Won the Student Research on Campus Sustainability Award from the Association of the Advancement of Sustainability in Higher Education (AASHE). • http://www.aashe.org/documents/resources/Graunke2008.pdf http://farm4.static.flickr.com/3223/3024356415_1d195ecbab.jpg?v=0

  3. Experiment Goals • Conduct waste audit for The Flour Pot Bakery • Quantify average methane output from food waste • Use food waste as feedstock for anaerobic digester

  4. Methods • Waste stream separated into: • Compostable paper • Food waste • Recyclable metal/plastic • Plastics 1-7 and most metals5 • Non-recyclable • Grind food waste to start homogenizing the sample • Blend sample in food processor to complete homogenization • Food waste then baked to analyze volatile solid content

  5. The Process of Anaerobic Digestion Source 4

  6. Anaerobic Digester Technology • Energy Park’s anaerobic digester: • 1 lb daily • 100 liters daily at peak Anaerobic digester design: continuous stir tank reactor.

  7. The Benefits of Biogas • Provides power from waste • Decreases amount of material going to landfills • Nutrient rich output • Use as fertilizer • May be scaled according to project size • Provides local source of power http://snre.ufl.edu/pubsevents/source/spring08/images/best2.png

  8. Alachua County Waste Data • Total Municipal Solid Waste Disposed1 • 159,080 tons • Population3 • 241,364 people • MSW per capita2 • 0.91 tons/capita • Source: http://appprod.dep.state.fl.us/www_rcra/reports/WR/Recycling/2006AnnualReport/AppendixG/Alachua.pdf 1. 2005 data. 2. 2006 data. 3. 2008 data.

  9. Alachua County Waste Composition • 800 tons per day of municipal solid waste • The remaining 68% is shipped to Union County Source: http://appprod.dep.state.fl.us/www_rcra/reports/WR/Recycling/2006AnnualReport/AppendixG/Alachua.pdf

  10. About The Flour Pot Bakery • Traditional European style bakery • No preservatives, no artificial additives • Active in every local farmer’s market • The Flour Pot Bakery’s website: • http://www.theflourpotbakery.com/

  11. Process • Two weeks of collection • Separation • Weighing • Physical breakdown of food waste • Analyze for volatile solid content • Provides methane output data • Feedstock for anaerobic digester

  12. Waste Audit Results

  13. Waste Composition

  14. Volatile Solid Data

  15. Volatile Solid Analysis

  16. Combined Results • Average food waste output of 17.11 lbs/daily • 4.7 kg/daily of volatile solids • 72.25 ft3 /daily methane production • 540.47 gallons/daily

  17. In Summary • Organize process with a local business • Analyze waste stream composition • Volatile solid content • Methane output • Potential to offset energy consumption

  18. Sources 1. http://docs.google.com/gview?a=v&q=cache:Z6JfYHI4gs8J:www.co.alachua.fl.us/assets/uploads/images/gm/ear/Economic%2520Development/Recycling%2520and%2520Waste%2520Alternatives.pdf+%22alachua+county%22+%22waste%22+%22composition%22&hl=en&gl=us 2. http://appprod.dep.state.fl.us/www_rcra/reports/WR/Recycling/2006AnnualReport/AppendixG/Alachua.pdf 3. http://quickfacts.census.gov/qfd/states/12/12001.html 4. http://images.google.com/imgres?imgurl=http://wgbis.ces.iisc.ernet.in/energy/paper/Tr_114/chapter2_clip_image002.jpg&imgrefurl=http://wgbis.ces.iisc.ernet.in/energy/paper/Tr_114/chapter2.htm&usg=__U6uK6CrnOP5ZM_18_67VEVXXY38=&h=622&w=600&sz=22&hl=en&start=19&um=1&tbnid=OLczafCPsidIdM:&tbnh=136&tbnw=131&prev=/images%3Fq%3D%2522anaerobic%2Bdigestion%2522%2B%2522process%2522%2B%2522simple%2522%26hl%3Den%26sa%3DG%26um%3D1 5. http://www.alachuacounty.us/government/depts/pw/waste/recycling/bigblue/whattorecycle.aspx

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