Food Scraps into Renewable Energy Anaerobic Digestion Rick Mazur, - - PowerPoint PPT Presentation

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Food Scraps into Renewable Energy Anaerobic Digestion Rick Mazur, - - PowerPoint PPT Presentation

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Food Scraps into Renewable Energy Anaerobic Digestion Rick Mazur, PE CIFT September 19, 2007 w w w .cift.eisc.org CIFT is affiliated with EISC, Inc. Biomass Energy Today Food scraps are biomass C neutral, environmental benefits

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CIFT is affiliated with EISC, Inc.

w w w .cift.eisc.org

Food Scraps into Renewable Energy Anaerobic Digestion

Rick Mazur, PE CIFT September 19, 2007

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CIFT is affiliated with EISC, Inc.

w w w .cift.eisc.org

Biomass Energy Today

  • Food scraps are biomass
  • C neutral, environmental benefits
  • E2, reduced waste disposal impacts
  • Energy grants DOE, USDA, Ohio
  • Growing market interest in carbon

credits, green energy & GHG (Chicago Climate Exchange, CCX)

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CIFT is affiliated with EISC, Inc.

w w w .cift.eisc.org

Biomass

  • DRY biomass vs WET biomass
  • Dry is typically more easily

handled, transported & stored

  • Wet often produces odors, has

limited or no “shelf life” making storage & transport difficult, $

  • Most food scraps - WET biomass

(Kitchen, processing, mixed MSW)

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CIFT is affiliated with EISC, Inc.

w w w .cift.eisc.org

Dry Biomass to Energy

  • Dry woody material is largest source
  • f biomass - trees, branches, chips,

scrap / demolition lumber, sawdust…

  • Field dry corn, beans, grains, grasses

and dry food scraps

  • Processing to ethanol, biodiesel
  • Direct burning to produce heat
  • Gasification technology to produce

gas/ liquid fuels, feedstocks, etc.

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CIFT is affiliated with EISC, Inc.

w w w .cift.eisc.org

Wet Biomass to Energy

  • WET biomass is very significant

source of energy - food processing solids & wastewater, scraps, dairy wastes, slaughterhouse, manure

  • Some are separated, accessible
  • Wet biomass is often pollutant so

improved handling is a benefit

  • Handling, disposal often costly
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CIFT is affiliated with EISC, Inc.

w w w .cift.eisc.org

Anaerobic Digestion

  • Natural process in tanks/ lagoons
  • Wet wastes in tanks => biogas
  • Mixed feedstocks work best e.g.

manure+oily food wastes+food processing scraps + sorted MSW

  • Reduces odors vs. compost
  • AD sludge => compost, bedding…
  • Wastewater effluent for irrigation
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CIFT is affiliated with EISC, Inc.

w w w .cift.eisc.org

per Dr. Floyd Schanbacher OSU OARDC

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( O H FW U L FL W \

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CIFT is affiliated with EISC, Inc.

w w w .cift.eisc.org

Food Scraps - AD Benefits

  • Energy generation using biogas

as fuel for electric, heat, etc.

  • Reduce odors from wastes
  • Tipping fees for food wastes –

value, environmental impacts

  • Potential value of AD sludge to

fertilizers (& compost) completing the Carbon cycle

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CIFT is affiliated with EISC, Inc.

w w w .cift.eisc.org

Common Types of Anaerobic Digesters

  • Lagoon – open or covered
  • Plug flow - flow in a large pipe
  • r channel with inlet & outlet
  • Complete mix – controlled &
  • ptimized mixture of materials

in a covered tank

  • Landfill MSW+H2O => biogas
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CIFT is affiliated with EISC, Inc.

w w w .cift.eisc.org

The AD Process

  • Under right conditions, AD begins

NOW so waste storage very important

  • AD suitable mixtures of 3-8% solids
  • Inject amendments in tanks to

maintain optimum AD conditions

  • Numerous process variations, bio-

system have inherent peculiarities

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CIFT is affiliated with EISC, Inc.

w w w .cift.eisc.org

AD at Snack Food Co.

  • Large scale feasibility- technology

& concept demonstration trial

  • Complete mix 8,000 gallon

anaerobic digester – New Bio Inc.

  • Demonstrated impact almost

$0.5M/ yr with electric generation, reduced ww surcharge, CHP, etc.

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CIFT is affiliated with EISC, Inc.

w w w .cift.eisc.org

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CIFT is affiliated with EISC, Inc.

w w w .cift.eisc.org

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CIFT is affiliated with EISC, Inc.

w w w .cift.eisc.org

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CIFT is affiliated with EISC, Inc.

w w w .cift.eisc.org

DAIRY FARM ANAEROBIC DIGESTER W/ FOOD SCRAPS/WASTES

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CIFT is affiliated with EISC, Inc.

w w w .cift.eisc.org

Installation of AD

Factors in AD implementation:

  • 1. Productive biogas usage / CHP
  • 2. Close to AD feedstock sources
  • 3. Close to irrigation water needs
  • 4. Close to operation to process AD

sludge to bedding, fertilizer, soil…

  • 5. Water quality/ environmental/ odor
  • 6. Likely rural, could be urban
  • 7. USA market potential: 1,000s AD
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CIFT is affiliated with EISC, Inc.

w w w .cift.eisc.org

CIFT AD Work

  • Ongoing AD development with

OSU OARDC Wooster + suppliers

  • Pilot scale, 50 gallon, AD tank with

Allen Bradley intelligent controls

  • Develop improved mixing &

process controls for concentrated wastes: smaller tanks = less capital

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CIFT is affiliated with EISC, Inc.

w w w .cift.eisc.org

Contact

Rick Mazur, PE EISC CIFT 5555 Airport Highway Toledo, Ohio 43615 419-535-6000 www.eisc.org