Two- Stage Pressure Fermentation - Optimising Biogas Production for Injection into a Natural Gas Grid

A.-M. Wonneberger, Y. Chen, S. Zielonka, A. Lemmer, F. Graf, T. Kolb & R. Reimert
The DVGW Research Station at the Engler­Bunte­Institute of the Karlsruhe Institute of Technology (DVGW­EBI, KIT) and the State Institute of Agricultural Engineering and Bioenergy at the University of Hohenheim (LAB) are developing a two­stage pressure fermentation process for biogas production. This development aims for facilitating a subsequent injection of produced biogas into the natural gas grid. In the process biogas is produced at injection pressure (> 5 bar) which avoids expensive compression. Furthermore, at elevated...