VTT and Gebrüder Lödige Maschinenbau GmbH have designed a new type of small bioreactor for use in high consistency biomass treatments in Otaniemi Biotechnology pilot hall. It provides the possibility to process biomass in very high consistency allowing the development and optimization of several different types of processes in the field of biomass refining. The equipment offers efficient processing of different kinds of raw materials, e.g. cereals and berries in high consistency.