Sludge incineration takes energy – TerraNova® Ultra makes sewage sludge energy usable

As it is commonly done today, incinerating sewage sludge requires about the same amount of energy as can be released from the sewage sludge itself. This is because of the enormous amount of energy needed to vaporize the water in the sewage sludge. In the overall process, then, no energy is gained; instead, in many cases, additional energy must be fed in.

With TerraNova Ultra, in contrast, approx. 90 percent of the water is mechanically extracted from the sludge in a highly efficient dewatering process after Hydrothermal Carbonization (HTC), resulting in smart sludge drying. The end result, when the HTC coal is burned, is an energy gain of 425 kWh per ton.

Using a TerraNova Energy system at a sewage treatment plant for 100,000 inhabitants can therefore generate approx. 3,400 MWh of environmentally-friendly energy per year.

“The heat consumption of a sewage sludge dryer will be reduced to just a third through Hydrothermal Carbonization”

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TerraNova® Ultra – energy self-supplying, smart sludge drying system

Combined with sludge digestion, the TerraNova® Ultra method has three additional, unique, and inspiring advantages:

  • The waste heat from the cogeneration plant alone can completely cover the process heat demand of the TerraNova Ultra system
  • It also increases the quantity of the biogas and therefore the power generated by the cogeneration plant by 15 percent. This amount alone will cover the energy demand of the TerraNova® Ultra process.
  • Compared to the technology commonly used today, the energy efficiency of the entire sewage sludge treatment process leading up to safe thermal disposal can be improved by up to 80 percent.

“The total energy balance of the sludge treatment is drastically improved through TerraNova® Ultra and this contributes significantly to climate protection.”

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