SUPERFLEX meet the plastics manufacturer, Freddie Bruzelius (August Olsens eftf.), to discuss SUPERFLEX' idea of using plastic membranes for spherical biogas digesters. August Olsen's eftf. suggests that SUPERFLEX should meet Jan Mallan, one of the leading biogas engineers in Denmark see interview. Work begins on the development of the basic principles of the pressure equalisation system for small-scale biogas digesters.