Page 7 - Vol34No7 MarchApril2017
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A final piece of the energy savings plan the unit has a 64-ton-per-day capacity. Each year, the Lebanon
for the Lebanon Waste Water Treatment Through the core technology of the PHG gasificaton plant will:
Plant was the addition of a solar field. Energy downdraft gasifier, the syngas
In another public/private venture with produced (92 percent by volume input) • Eliminate 2,500 tons of carbon emissions
Energy Source Partners, the wastewater is combusted in an industrial thermal
treatment plant is in the process of oxidizer (an emissions control device). • Keep 8,000 tons of waste out of the landfill
installing over 3,400 solar panels to That thermal energy is transferred to heat
provide a megawatt of electricity at peak water, and the water drives a 400 kW • Convert 36,000 scrap tires to energy
times. This solar venture will be fully Organic Rankine Cycle generator. All
operational by the fall of 2017. feedstock is locally sourced and prepped • Generate 1,800,000 kilowatt-hours of
by a specialty contractor. This company electricity
The excitement extends to academia will ensure that wood and tires are cut to
as well. The University of Tennessee is 1" to 3" size. Sludge will be blended with This is equivalent to:
building partnerships with the City of that mixture on site. The target moisture
Lebanon to study uses of biochar. The content of the total blend is 30 percent. • Electricity equal to 312 homes
studies will vary from improving crop The blend will yield 8 percent biochar that
production in farm applications to use in is 70 percent carbon and recyclable. • Carbon elimination equal to 450 vehicles
chicken broiler houses to reduce ammonia
emissions, with many other beneficial Overview of Benefits • Diversion from landfills equivalent to a
possibilities. Cumberland University in line of semi trucks 4 miles long (8,000,000
Lebanon is also discussing multiple ways When the plant is running at full pounds per year)
to be educational partners as well. capacity, 5,000,000 lbs (2,500 tons) of
carbon emissions will be kept out of the Waste Reduction
Project Design Objectives air each year, which equates to the CO2
produced annually to provide electricity • What goes in daily –
The overall objective of the plant to 312 homes, or the annual Greenhouse 32 tons of landfill wood/tires/sewer sludge
is multi-fold. The energy created will Gas Emissions from over 450 passenger
provide clean, sustainable power for the vehicles. More than 16,000,000 lbs (8,000 • What comes out –
WWTP while eliminating the hauling tons) of material will be diverted from 1.6 tons of biochar (often used as a soil
and spreading costs of sewer sludge. It landfills each year, and this will help both enhancement) and 200 kW of green
will also reduce the amount of municipal the city and local industries move toward electricity
material hauled to landfills and tipping zero landfill goals. The system will create
fees paid. The addition of scrap tires to a positive use for more than 800,000 City of Lebanon Green Initiatives
the feedstock brings a beneficial use to lbs (400 tons) of scrap tires annually.
an old problem. This new system will And over 20 million kilowatt-hours of Gasification Initiative – 1st in Nation - Waste
be financially viable and not a burden renewable electricity during the 20-year to Green Energy, largest downdraft gasifier
to taxpayers as it was when tipping fees lifespan of the project will be produced. in the world
were paid to commercial partners. And it
will create a new infrastructure for future Plans are also in the works with a local Solar Energy – 2 Locations in Lebanon
expansion. university to create opportunities to
involve interested students in the overall Natural Gas Vehicles – Building City Fleet
System Details initiative. This would give students a
chance for some hands-on learning with Commuter Rail – First in Nashville
The overall footprint of the gasification this type of energy application.
plant is less than one acre. In that space, Recharging Stations – Green auto
Residential Recycling – City initiated Pilot
Recycling Program for Residences
Parks/Walkways/Greenways
View online at tnpublicworks.com 7
