Biogas plant and biogas treatment
AssigneeHitachi Zosen Inova AG
InventorsJens BECKER, Jan WIEGERS
Life of this patent
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Abstract
A biogas plant includes a fermenter, a biogas processing unit and a thermal engine. The biogas processing unit includes a gas separation unit and a compression unit for the separation of raw biogas from the fermenter into two gas streams, whereby the first gas stream includes a product gas that is enriched in biomethane with respect to the composition of the raw biogas and the second gas stream includes a residual gas that is enriched with carbon dioxide with respect to the composition of the raw biogas and has a biomethane concentration of less than 20%. The thermal engine produces energy that is used for operation of the compression unit.
Claims17
Biogas plant including
- a fermenter for the production of raw biogas from biomass,
- a thermal engine, which is provided with a combustion gas for combustion for the production of mechanical and/or thermal energy,
- a biogas treatment plant including a compression unit and a gas separation unit for the separation of the raw biogas into a first and second gas stream,
- wherein the first gas stream consists of a product gas that is enriched in biomethane with respect to the composition of the raw biogas, and the second gas stream consists of a residual gas that comprises less than 20% biomethane and is enriched in carbon dioxide with respect to the composition of the raw biogas,
- and an exhaust gas treatment unit, which is provided with an exhaust gas for treatment,
- wherein at least part of the energy produced by combustion of the combustion gas in the thermal engine is used for operating the compression unit.
Dependencies are inferred from the claim text.