The TerraNova® Ultra -Process:
Sludge + Hydrothermal Carbonization = Energy + Phosphorous – Cost
The TerraNova® Ultra Hydrothermal Carbonization – based system involves a technology that mimics natural coal creation and very significantly accelerates it.
To do so, sewage sludge is “carbonized” for two hours at a temperature of approximately 200° C and under a pressure of 20 to 35 bar, excluding air; this process transforms it into a fuel much like lignite coal.
This fuel, in contrast to sewage sludge, contains hardly any water. Thanks to its high energy content it can be burned to generate energy in lignite coal power plants or to lower the energy requirements in cement plants or waste-incineration plants.
As an additional product, HTC also yields the water extracted from the sewage sludge. This HTC filtrate is low in pollutants, sterilized, and nutrient-rich, because it contains a large proportion of phosphorous from the waste. The phosphorus is recovered as part of the process and can be used as particularly rich organic fertilizer, which has been proven in real-world comparisons with common commercial fertilizers.
If combined with an existing sludge digestion, the biogas yield will be increased by an additional 10% due to co-fermentation of the HTC excess water- therefore improving significantly the on-site the power generation.
The TerraNova® Ultra systems feature a highly efficient heat-recovery, minimizing the heat consumption of the HTC process.
Through the truely continuous operation of the TerraNova® Ultra plants without any pressure and temperature drops and with only a few moving parts a maximum reliability can be provided.