Translations:Torréfacteur solaire de café/27/en

The rotating movement could be done in several ways:

• Using the hands : a handle could be directly fixed to the cement mixer's gears. Undertaking the roasting process manually for 20 min could however be tiring.

• Using a generator: the toothed wheels of the cement mixer's gears could be linked to the rotation axis of a motor, using a belt or a chain. This motor could be fed thanks to a generator, the electrical network or batteries which would store the energy from solar panels, wind or water turbines. In this way, the motor will make the roaster rotate.

• Using a water turbine: if there is a stream in the area, the toothed wheels of the cement mixer and the rotation axis of a water wheel could be linked together using a belt of a chain. The water wheel will then transmit its rotation movement to the roaster.