Therma-Flite has designed the Therma-Flite IC and IB series ‘Bio-Scru’ biosolids dehydration systems with design criteria to address the needs of all small and medium size municipalities or biosolids processors. Our goal is to keep operator attention and maintenance cost at a minimum, while achieving a consistent Class A material and reducing or removing disposal costs completely.

The electrically heated screw processor was developed because of the need to physically separate volatile and semi-volatile contaminants from soil, sediment and sludge. This is accomplished by heating to a temperature high enough to volatize the organic contaminants without the use of incineration. Previously dewatered sludge is heated in a chamber in which water, organic contaminants and certain metals are vaporized.

The “Holo-Scru” Processor is an indirect heat exchanger comprising of a series of rotating helical ducts or hollow flights. Heat is transferred via a heat exchange agent through the inner surfaces of the hollow flights and shaft. And since the principle of the conveyor is employed – the particles of the material within the mass are subjected to continuous movement by the helices and are constantly changing location.

The “Pyro-Scru” Processor is a screw heat exchanger capable of operating at very high temperatures by passing clean hot gases through passage ways in the rotor and housing. These hot moving surfaces efficiently transfer heat to the material and reduce problems of material adhering to the sides of the housing. Ninety percent of the screw surfaces are in contact with the material which results in high heat transfer efficiency, greatly reducing the equipment size.