Our RSD® technology starts where conventional liquid biogas plants and plug flow systems reach their limits. Dry fermentation, on the other hand, allows the fermentation of dry and fibrous substrates (dry matter: 20%-55%), which often cause problems in other systems.
The process runs in batch mode and provides a continuous biogas yield. The plants consist of several digester boxes (garage digester), which are filled and emptied in a fixed cycle. The manual effort required is extremely low, since apart from the simple loading and unloading activity, pre-treatment of the substrate (shredding, shredding) is rarely necessary. In addition, the substrate is not being moved during the entire retention time (18-21 days). The failure and maintenance costs of the technology are reduced since no sensitive stirring and pumping technology is used (avoidance of floating and swelling layers).
One of the most important advantages of dry fermentation is the low demands on the substrate. This can contain impurities that remain as residues after the process and is less dependent on particle sizes as well as fiber content. As an example, consider domestic biowaste, which often contains residual materials such as packaging materials, or horse manure with horseshoes or holsters, which can cause great damage to stirrers.
The biogas produced can then be directly converted into electricity or processed, as biomethane or bio natural gas, and fed into the gas grid or used as vehicle fuel (CNG).