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Chris Hubbard
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Solar Dryer Advantages
Solids volume reduction
Reduce solids disposal costs
Adaptable
Solar energy is ‘free’
Create a saleable product
“Biosolids becomes one of the biggest parts of wastewater treatment. Often it is the where you spend most of your time.”Dan Olson, Plant Superintendent, Tooele City WWTP, UT
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Solar Dryer Challenges
A Slave to the Sun
Limited by solar heat availability
Materials Handling Requirements
Loading, Mixing, Unloading
Environmental Concerns
Odor and Dust Control
Maintenance and operational
Equipment Reliability & Maintenance
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Not a ‘Slave’ to the sun- use supplemental heat
In-floor Radiant HeatSuppliments the Solar power available
Waste Heat from nearby process
Heat pumps
Cogeneration
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Not a ‘Slave’ to the sun- use supplemental heat
Sewage / plant effluent: RoWin Heat
Exchanger to capture waste heat
Can be used in a stand-alone
application, or in conjunction with
heat pumps.
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Materials Handling
Using a single turning device and continuous process system instead
of a batch system reduces materials handling challenges
VS.
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Materials Handling Loading (Charging)
Ease of solids loading (charging)- Conveyors or trucks can
be used to charge the system at the ‘front’ end
No need to manually distribute solids throughout the space
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Materials Handling- Mixing/ Conveying
Complete, uniform mixing/ turning No ‘dead’ spots in corners Uniform turning of entire bed
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Materials Handling- Discharging
Automated discharge, continuous flow Discharge at either end of greenhouse Discharge into bunker or screw conveyor
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Environmental Concerns
Odor Control
Aeration is key
No Dead Spots
Dry product back-mixed with
incoming feed
Odor Control System not Required
Dust Control
• By utilizing the continuous
process, dryness can be precisely
controlled
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Maintenance and Operation
Only one moving device
Slow Turning Equipment
Minimal sensitive components
in process area
Flexible Controls/ Recipes
Maintenance access from
outside the process area
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System Summary
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Huber Technology, Inc.9735 NorthCross Center, Suite A
Huntersville, NC 28078www.huber-technology.com
Thank you