Sewage sludge inevitably contains a great deal of toxic material. Alongside heavy metals, which are introduced to the sewage treatment system mostly through rainwater, there are highly toxic organic toxins such as dioxins, pathogens such as bacteria, viruses, parasites or worm eggs, and, in increasing quantities, pharmaceutical remnants that increasingly accumulate in the sludge due to ever-improving sewage treatment methods.
The Hydrothermal Carbonization technology of TerraNova® Ultra runs under the exclusion of air at approx. 200° C and under a pressure of more than 20 bar. This process ensures that the toxins in the sewage sludge are destroyed or can be disposed safely.
In addition, toxic waste has long been an unused source of nutrients such as nitrogen and phosphorous, which are both valuable fertilizers. For the first time, a large portion of these nutrients can now be recovered economically through the TerraNova Ultra method, either as a topsoil-forming organic fertilizer or as a basic material for the fertilizer industry. In view of decreasing natural resources, the growing demand and rising prices, phosphate reutilization is of particular importance.
Within TerraNova® Ultra Phosphorous is leached out from the sewage sludge and recovered by adsorption to natural minerals. The resulting product is a granulate Phosphate fertilizer that already today complies with upcoming legal regulations. The very moderate amount of chemicals as well as the easy one-step process allows for low production cost of the recycled Phosphorous.
“Growth tests with TerraNova® Ultra liquid fertilizer show better results than commercial liquid fertilizer”
TerraNova® Ultra runs with minimum emissions of greenhouse gases- and the resulting coal is a renewable fuel, because only the quantity of CO2 that was taken out of the environmental cycle during the biomass growth phase is released when it is burned.
Therefore, during combustion of the coal obtained through the TerraNova® Ultra method, recyclers can count on a CO2 credit. Because its fuel value is comparable to that of German lignite coal, biochar prevents the carbon dioxide emissions associated with lignite coal.
If a city with 100,000 inhabitants, for example, implements the TerraNova Ultra method in its sewage treatment plant, annual emissions of CO2 are lowered by 1,220 tons  – which is more than one square kilometer of forest can extract from the atmosphere!
“The climate study for the city of Berlin has proven that Hydrothermal Carbonization of sewage sludge provides the second largest CO2 saving potential of all options.”
Geschäftsführer: Dipl. Ing. Marc Buttmann
Amtsgericht Düsseldorf HRB 61802 St.Nr. 133/5874/1312