the covington wastewater energy project progress
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TRANSCRIPT
![Page 1: The Covington Wastewater Energy Project Progress](https://reader034.vdocuments.net/reader034/viewer/2022051612/54c129814a7959a4638b468e/html5/thumbnails/1.jpg)
Industrial Grade Gasification
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Delivering Affordable Renewable Technology
Through Gasification
Clean Energy Conversion
Tipping Fees
Transportation Costs
New Landfills
Carbon Emissions
Sludge Disposal
Clean Energy
Crop Residues
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PHG Energy: Industrial Grade Gasification
Large Format Gasifier
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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
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Applications
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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
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Covington, TN WWTP: May 16, 2013
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PHGE ORC Demonstration (Gleason, TN)
Producer gas provided by one PHGE small format gasifier (a total of six are installed)
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WWTP Sludge Drying
Application
Create “Class A” Biosolids
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Industrial Grade Gasification
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The Flow of Material to Gas
Feed Hopper
Feed Auger
Gasifier
Biochar Collected
Gas Exit Pipes
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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
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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
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WWW.PHGEnergy.com
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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
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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