| 摘要 |
A process for producing biogas from biomass such as animal faeces with added organic components is described, which supplies biogas which, compared with conventionally produced biogas, has a significantly higher specific calorific value. For this purpose, in a first treatment phase bacterial strains are added to the biomass which produce biogas having a relatively high CO2 fraction from the reaction material. This first treatment phase is followed by a second in which bacterial strains are used which are able to produce methane from CO2. The biogas produced in the first treatment phase is offered to the bacteria active in the second treatment phase as nutrient, as it were. In an apparatus suitable for carrying out the process according to the invention, reaction chambers suitable for the individual treatment phases are thermally well insulated from each other and can be heated to the particular reaction temperatures at which the bacteria used for each respective purpose develop most expediently.
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