1105. improved performance in solar biosolids dryer ...€¦ · odor control aeration is key no...

Chris Hubbard

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

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

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

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.

Materials Handling

Using a single turning device and continuous process system instead

of a batch system reduces materials handling challenges

VS.

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

Materials Handling- Mixing/ Conveying

Complete, uniform mixing/ turning No ‘dead’ spots in corners Uniform turning of entire bed

Materials Handling- Discharging

Automated discharge, continuous flow Discharge at either end of greenhouse Discharge into bunker or screw conveyor

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

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

System Summary

Huber Technology, Inc.9735 NorthCross Center, Suite A

Huntersville, NC 28078www.huber-technology.com

Thank you