(IMAGE) Helmholtz Centre for Environmental Research - UFZ Caption Marcell Nikolausz and his colleagues discover that biogas production can be controlled by altering the frequency at which the reactors are fed. Credit André Künzelmann / UFZ Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.