Method for operating a biogas system for the continuous fermentation of substrate mixtures and biogas plant for the continuous fermentation of substrate mixtures

摘要

The present invention describes a method for fermenting substrate mixtures, which mainly contain animal manure, in particular horse manure. The problem is solved in which the dry residue in the fermenter is raised far. This has the consequence that the fermenter with the same residence time can be made smaller and the sand contained in the animal dung does not sediment in the fermenter. Furthermore, solutions are described for problems which occur especially in biogas plants, which mainly ferment animal manure, in particular horse manure. These include the problem of poor degassing of the fermenter content as well as the separation of a fine-rich, highly viscous process water from the sand-containing fermentation substrate of a biogas plant, which fermented mainly Tiremist, especially horse manure.