An wind turbine blade mould side adjustment device is provided, characterized in that the device is provided at a flange of the mould, and the side adjustment device comprises an upper part and a lower base, wherein the lower base is fixed on the mould frame and the upper part is capable of sliding over the lower base in a direction substantially parallel to the blade width direction. The inner casing parts pivotally engages with the outer casing parts and the arched lock piece is located in the inner casing parts. Different technologies are provided for communicating between the beacons and a beacon controller interface. In addition, after CO2 scrubbing, a partial amount of top gas removed from the first reduction zone is admixed with the generator gas after the latter leaves the melter gasifier, for cooling the generator gas. One example of the method involves reminding the user of a task associated with an incoming communication, and another example of the method involves reminding the user of a task associated with an outgoing communication. This approach is found to prevent the formation of an overhang at the position of the step, whereat it would cause progressive restriction of the trench throat and void formation.