KEU is a special non-hazardous waste deriving from waste water treatment plants (CER 190112). As stated by ARPAT (Regional Agency for Environmental Protection of Tuscany), it is material deriving from the heat treatment of the sewage sludge produced by the Aquarno purifier, into which the wastewater from the tanning companies of Santa Croce sull’Arno is conveyed. In itself it can be considered a matrix with potential uses in various fields, due to the different properties, enhanced with appropriate treatments.
In the photo we find the stabilized KEU, but still with traces of metal as can be seen from the red granules.
KEU pyrolyzed at 850 ° C
KEU pyrolyzed to almost a thousand degrees, is completely inert. No agent will be able to ignite or modify it in any way.
At this stage, the KEU becomes optimal for the function conceived within REVOC, namely that of trapping VOCs in the cracks.
In fact, the KEU has all the appearance and tends to function like an activated carbon, therefore it can absorb the microparticles of chemicals found in aerosols inside the spray booth. The gases emitted into the air by the tannery, but in reality by many other industries, would be much more discharged through this method, ensuring air cleaning due to the absence of chemical particles.
The KEU in pellets, obtained from pallotization, here in varying degrees, represent the result of experimentation as a VOC retainer.
In fact, the VOCs, which are volatile, are trapped in the KEU creating a rotational movement. Pallotization is the same principle that the dung beetle uses to store food.