This information service on biogas technology has been developed and produced on the order of the GTZ project Information and Advisory Service on Appropriate Technology (ISAT). It contains information on the application of biogas and product development.
KOSSMANN, W. POENITZ, U. HABERMEHL, S. HOERZ, T. KRAEMER, P. KLINGLER, B. KELLNER, C. WITTUR, T. VON KLOPOTEK, F. KRIEG, A. EULER, H. (1999): Biogas Digest Volume II. Biogas - Application and Product Development. Eschborn: GTZ URL [Accessed: 27.05.2019]