• 01.07.2018 – 30.06.2020

Final report only available in german.

Key-messages:

1. In more than 50% of the organic goods treatment plants in Germany,> 10% of the plant input is disposed as sieve residues, whereby the disposal costs have risen sharply in recent years.
2. High levels of foreign matter, as well as high levels of ash and harmful elements, are problematic for a legal classification of the sieve residues.
3. Extensive systematic investigations (foreign matter content, grain size, ash content, etc.) on the subject of sieve residues were carried out on four practice plants with different treatment and processing technology, which can be of great benefit to the many plant operators in Germany.
4. With regard to an economic assessment or an assessment of the climate relevance, the actual situation on site (system configuration, input material, etc.) is decisive. Two standard examples were considered in the project.
5. Sensory techniques (NIR) or innovative combinations of existing techniques (e.g. air separator, stone trap) are available for optimized sieve residue processing.
6. In addition to an optimized processing of organic material and organic material residues in a holistic treatment concept, the quality assurance of the input material (organic material) is of decisive importance.