Hydrothermal Carbonisation (HTC)
During the hydrothermal carbonisation a chemical and a physical dehydration of biomass takes place. The chemical dehydration takes place by the separation of water molecules from hydroxyl groups, while the physical dehydration is supported by the lower viscosity of the water, the decomposition of colloids and the decrease of hydrophilic functional groups. These phenomena lead to a simpler and improved mechanical dewaterability of the HTC-coal compared to sewage sludge or other biomass.
AVA-CO2 technology achieves thanks to the hydrophobic nature of HTC-coal dewatering values above 70 % - without the use of polymers or other additives. Through the destruction of the cell structures of the biomass remaining water is only present as surface water, which allows for a simple and cost efficient drying. An unbeatable advantage.