Biosolids Drying System

BIO-SCRU Biosolids drying to "Class A" PFRP

Choosing the right drying system for your treatment plant is essential to maximizing cost efficiencies and reducing environmental impact. The BIO-SCRU® dryer system eliminates pathogens and reduces moisture content to 90% and volume to typically 20% or less. The BIO-SCRU® is a simple, easy to maintain dryer system, with a small footprint. The fully automated system insures exceptional product quality and safety. Sizes available from ½” to 8 tons per hr.

KMT International Inc represents Therma-Flite, Inc technology.

Patented BIO-SCRU® Technology makes possible energy-efficient, automated, continuous drying of biosolids and production of a Class A Biosolid. Under 40 CFR, part 503 the United States Environmental Protection Agency has published regulations for technologies to further reduce pathogens in Municipal biosolids and to reach Class A biosolids that are safe for the environment. Municipalities now have new choices in the safe disposal of biosolids as opposed to the regulations addressing Class B biosolids.

Therma-Flite has designed the Therma-Flite IC series biosolids dehydration system with design criteria to address the needs of the small to medium size municipality and to keep operator attention and maintenance cost to a minimum. The Therma-Flite IC Series BIO-SCRU® sludge dryer system is an automated continuous processor. All operating parameters are under the control of the PLC system and the automated process operates continuously, all with minimal operator attention

The BIO-SCRU® can dry sludge’s other systems cant. The BIO-SCRU® is effective in drying; digested, undigested primary, waste activated sludge and mixes of these type sludge’s as is common for regional facilities. The unique design of the BIO-SCRU® includes features to continuously remove buildup from the heat transfer surfaces. The system also eliminates any large clumps from building and passing through the system via a series of cutters that break up the clumps and homogenize the particle size at each stage of the rotor.

The BIO-SCRU® continuously produces 90%+ dry product with a variety of sludge consistencies due to three primary control factors. With the ability to control the feed rate into the dryer, the residence time in the dryer and the temperature of the dryer, the IC-Series BIO-SCRU® continually produces a dry product of consistent solids content.

The heat energy for drying, is indirect, thermal fluid is circulated through the rotor, fliting and the outer jacket of the drying chamber, in a closed loop path. The drying process operates under a slight negative pressure in a sealed chamber. Feed is extruded into the dryer from the feed hopper. A lock box and cooling screw maintain the seal at the discharge. A integrated scrubber/condenser removes the vaporized water from the system and captures any particulate.