4. This is NOT incineration
• Minimal cleanup required for emissions
• Clean burning gas called Producer Gas or Syngas
• Ability to retrofit current equipment
• Biochar created from the process is stable and has secondary
uses
• Feedstock flexibility
Gasification- The clean, efficient conversion of biomass
into combustible gas in an oxygen-starved environment
6. City of Covington, TN
• Utilize Waste Material
• Save and Redeploy Money
• Serve the Community
• Help Our Environment
7. Covington Waste-To-Electricity System
• Cash flow positive for the city
• Over 360 tons/month diverted from landfill
• Saves over 425 tons of CO2 per year
• Upside potential with sale of biochar
• Future sludge drying opportunity
9. GE/PHGE Collaboration in Gleason, TN
GE’s Heat-to-Power Technology
And PHG Energy Produce
Kilowatts from Wood Chips
NASHVILLE, TENN. – June 12, 2013 -
GE Power & Water and PHG Energy,
a Nashville-based alternative energy
equipment company, have
successfully collaborated on an
innovative project to produce
electricity from waste material by
employing gasification technology to
power GE’s Clean Cycle heat-to-
power generator.
The Clean Cycle heat-to-power
generator, a product manufactured
by GE Power & Water, is used
worldwide to
12. The Flow of Material to Gas
Feed Hopper
Feed
Auger
Gasifier
Biochar
Collected
Gas Exit Pipes
13. What Can You “Gasify?”
• Woodchips
– Utility trimmings
– Scrap pallets/Construction
– Bark or waste wood
– Commercial waste
• Agricultural and animal waste
• Scrap tires and rubber products
• Food processing and other
manufacturing waste
• Switchgrass, miscanthus and other
purpose-grown energy crops
• Mixtures improve performance
14. A Positive Economic Impact Is Essential For Every Project
Reduce tipping fees
Reduce hauling costs
Provide alternative energy
Competitive with fossil fuels
Mitigate supply & price risks
by using local feedstocks
PHG Energy Projects
16. Feedstock Specifications
• Consistent feedstock = consistent gas
• Moisture content is key (< 30%)
• Feedstock size: ¼” to 4”
• Ash content < 10%
• Minimum bulk density: 14lbs/ft3
• Low cost waste streams from other processes can
greatly improve economics
• Feedstock “Blends” offer further flexibility
17. Downdraft Gasification
Evaporate moisture from
the feedstock
Feedstock breaks down to
gas and tars
3000 degree F oxidation
layer cracks tars
Carbon reforms with steam
to create CO and H2
Rotating Grate shaves
biochar layer
Residue box for biochar
removal
Drying
Pyrolysis
Oxidation
Reduction
Grate
Residue
Air
Air
