Dranco has developed the DRANCO-FARM dry digestion technology to produce renewable energy out of organic substrates such as energy crops, crop residues, agro-industrial by-products etc.The degradation of organic matter takes place under anaerobic conditions in a vertical digester. The degradable fraction is converted into biogas. The biogas can be used for the production of electricity and/or heat or, after upgrading, as biomethane.
The non-degradable fraction forms a residue, having a total solids content depending on the feedstock. It can be stored and spread back out on the field or it can be treated further (drying/dewatering/…) for the production of high quality soil conditioner.
This dry anaerobic digestion technique is ideal to digest maize, sunflowers, grass, etc. and it is also well-suited to digest pure industrial by-products such as glycerine, rapeseed presscake, dried distiller grains, etc.