Biogas: A renewable source of energy

First part of the paper deals with biogas produced in the process of anaerobic digestion. Possibilities of biogas utilization are commented briefly. Laboratory fermentation unit that was built at the Institute of Process and Environmental Engineering is described further on. The laboratory fermentation unit is used for digestion of new types of substrate and for process optimization. Finally, the biogas plant built in Sweden is described. Biogas produced there is treated and used as a fuel for public transport vehicles