At the treatment plant Aquarno 3 anaerobic digesters are operational with capacity of 150L everyone.These demonstrators initially have proceeded to prepare a sufficient amount of inoculum for the start-up of the pilot plant 5m3, but later they have been dedicated to the experiments of possible mixtures of co-digestion and different operating conditions. Each digester possesses the appropriate controls and instrumentation to ensure correct operation even for long periods of time / test.