After hydrothermal pre-treatment, enzymes are added to the fiber mass, which consists mainly of cellulose and lignin. The fiber mass is liquefied as part of the cellulose is converted to lower carbohydrates. The process takes place in a horizontal reactor with paddles, a so-called free-fall mixer. 

The process is continuous.  The fiber mass leaves the pre-treatment with 30-40% dry matter content, enters the reactor at one end, and, after a couple of hours, exits the other end of the reactor.

By the time the fiber mass leaves the reactor, the viscosity has been dramatically reduced, and the substance can be pumped to traditional fermenters typically used in 1st generation ethanol plants. 

All equipment is developed and tested in cooperation with various Danish sub-suppliers. The process is patented and is only available from Inbicon.