The Decision Support System is a software-tool that supports the operator of an anaerobic digester in running the reactor at maximum methane-production rates and minimum production rates of gases toxic to fuel cells at the same time. The core of the software is a neural network application realized completely in LabViewÓ. The neural network is trained with data gained from the experiments during AMONCO. The self-learning tool of neural networks enables a fast adaptation on different plant specifics.