This document discusses industrial grade gasification technology provided by PHG Energy. It can gasify a variety of feedstocks to produce a clean burning syngas while also creating biochar. The process is not incineration and requires minimal emissions cleanup. It has been implemented in a waste-to-energy system in Covington, TN that saves the city on disposal costs while generating revenue from biochar sales and reducing landfill waste and CO2 emissions. PHG Energy systems can also be used for applications like wastewater treatment plant sludge drying. The technology enables a cost-effective way to convert local waste streams into renewable energy and useful byproducts.

1. Industrial Grade Gasification

2. Delivering Affordable Renewable Technology
Through Gasification
Clean Energy Conversion
Tipping Fees
Transportation
Costs
New
Landfills
Carbon
Emissions
Sludge
Disposal
Clean
Energy
Crop
Residues

3. PHG Energy: Industrial Grade Gasification
Large Format Gasifier

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

5. Applications

6. Covington Waste-To-Energy 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

7. Covington, TN WWTP: May 16, 2013

8. PHGE ORC Demonstration (Gleason, TN)
Producer gas provided by one
PHGE small format gasifier
(a total of six are installed)

9. WWTP Sludge Drying
Application
Create “Class A”
Biosolids

10. Industrial Grade Gasification

11. The Flow of Material to Gas
Feed Hopper
Feed
Auger
Gasifier
Biochar
Collected
Gas Exit Pipes

12. 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

13. 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

14. WWW.PHGEnergy.com

15. 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

16. 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