Abstract
Due to negative experiences in the past, biogas technology could not establish itself in Brazil. Currently though, there is a revival of agricultural biogas plants there. Biogas production from animal residues is especially suited for the southern regions, where swine and poultry farms are concentrated. Generally the Brazilian plants are small and simple units, which cannot be compared to those in Germany. Vinasse, a fluid residue from alcohol production with high potassium content, is generally used as fertilizer on sugar cane fields. Using vinasse as a substrate for biogas production would be very recommendable, but is seldom done due to lacking general political conditions and technology.
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