Biogas Upgrading to Biomethane

Biogas and biomethane as alternative renewable energy sources have been finding their way to end consumers for many decades. Their growing popularity in recent years has been attributed to the usability of gas as an all-around energy source and excellent suitability for long-term storage.

Wide range of application

  • heating of premises
  • use in industrial processes
  • electricity generation in large power plants
  • motor vehicle propulsion

Biogas upgrading (purification)

Biogas is produced from organic materials and waste (biomass) as a result of the anaerobic digestion process. This is a natural process that takes place in an environment without oxygen (see Biogas plants). The common composition of the biogas produced is methane, carbon dioxide and traces of components such as hydrogen sulfide, siloxanes, ammonia and nitrogen. During the biogas upgrading process, these undesirable inert and corrosive substances are removed.

However, the most important step is to eliminate CO2, which leads to a percentage increase in methane content. This process increases the energy content of biogas to a quality level equivalent to natural gas. Biogas upgraded in this way is called biomethane.

Biogas upgrading equipment is purposefully designed so that biomethane at the injection point had the qualitative composition matching that of natural gas. The upgrading process is not just about reducing the CO2 content. It is necessary to make sure that all biomethane specifications are suitable for further uses, such as its injection into the natural gas distribution network or filling the tanks of CNG vehicles, which usually includes dehumidification of the biomethane, pressure regulation and control of the Wobbe index.

We offer three basic technologies. The technology type is always designed according to specific customer requirements with an output from 60 to 3,500 Nm3/h.

Upgrading equipment

The equipment is always designed according to specific customer requirements. We offer the following types:

Injection into the network

Modified biogas – biomethane, is ready for injection into the pipeline distribution network. Compressors or compression stations must be used for an efficient injection of biomethane into the distribution network (see CNG technology). The output pressure from the compression station is set individually according to the operating conditions of the pipeline.

Block scheme – injection into the network

Filling stations

Biomethane can also be used as fuel for natural gas vehicles. Our equipment for compressing gas are fully up to this task (see CNG equipment). Biomethane is stored in tanks at a pressure of 25 or 30 MPa and is dispensed into vehicles using a standard filling stand or dispensing equipment.

Block scheme – direct use for vehicle refueling



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