Wood chips, digestate, branch cuttings, shells, husks, grasses, stalks, sewage sludge and more
The list of raw materials that are suitable for pyrolysis in the Carbon Twister is long. As long as a few boundary conditions are observed, almost any dry, organic raw material can be used.
Varietal purity not required
Mixed materials as well as single-variety raw materials can be processed in the reactor. This does not affect the pyrolysis process itself. Materials with a lower density will tend to ash a little more than dense materials, a fact that may have some effect on the carbon content in the biochar.
Inhomogeneities in the raw material are common
Geometric inhomogeneities in the raw material do not pose a problem. So there is no need to use standardised, homogeneous raw material. The time required for pyrolysis is determined by the geometrically largest fraction. In the case of very large inhomogeneities, this may result in a slightly lower carbon content in the biochar.

Insensitive to interfering materials
The raw material is not moved in the reactor itself. The system does not contain any moving screw drives. This makes the entire process extremely insensitive to interfering materials such as stones, nails and soil residues. Stones and nails can be removed after pyrolysis. The soil residues are recovered as ash after pyrolysis.
Water content
For good pyrolysis results, the water content of the raw material must not exceed 20%. Accordingly, the dry matter content (DMC) must be at least 80%.
Moister material can be pre-dried, e.g. with the help of the process waste heat. In the Carbon Twister, even separated digestate with an original dry matter content of 30% can be pyrolyzed after it has been dried.
EBC quality
The Carbon Twister allows you to achieve the laboratory limits for all EBC quality levels. Even with materials such as digestate, from which one supposedly might not expect it. High-quality input material usually leads to a higher carbon content in the biochar.