OWS offers the design and construction of wet completely mixed digesters. These digesters work at a low total solids-content and can be used as main digesters, or as post-digesters (e.g. following a DRANCO-FARM or BES-Plugflow digester). OWS uses this type of technology for clean and wet organic feedstocks such as energy crops, agro-industrial residues or food waste. The BES-CSTR is a continuously stirred tank-reactor with a gas storage on top.