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Air Liquide Skagerak offers biogas and natural gas

What is biogas?

Biogas production process
Biogas arises from the decomposition of new biological material, such as animal manure, sewage sludge and food waste, without the supply of oxygen. The gas is odorless, colorless, and non-corrosive.

Upgraded to vehicle quality, biogas consists of approximately 98% methane (CH 4). 

Contributing to a more circular economy
Biogas is produced from biodegradable waste originating from agriculture, the food-processing industry,and  garden waste, which is collected locally then processed in nearby biogas plants.

Biogas can then be distributed and used as fuel, providing a renewable source of energy for local industries and transport infrastructures. Nothing is wasted: residues from the biogas production become fertilizers, reducing the use of artificial products.

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The biogas at Greve

Air Liquide Skagerak markets and distributes all biogas from the Greve plant, first and foremost to the transport sector in Vestfold and Grenland.

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  1. Is a mixture of livestock manure (pig and cow) and food waste collected locally in Vestfold and Telemark.
  2. In the rot tank, the mixture combines with bacteria to develop raw biogas (about 60-65% methane).
  3. After upgrading and purification, the final product is 98% methane.
  4. The methane is introduced into Skagerak's existing gas infrastructure for further distribution and used as fuel.
  5. The bi-products are mainly water, CO2 and H2S, with most of the rest becoming bio fertilizers.
  6. CO2 will be captured and sent in tubes to greenhouse plants for growing tomatoes.
  7. H2S is trapped in a coal filter and further refined
  8. The bi-residue is then returned to farmers as fertilizer.
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Liquified or compressed biogas for different uses
Biogas can be stored in two ways depending on its final use. 

LBG: Liquified Biogas is the term for liquified, cooled biogas. The gas is condensed to liquid by cooling to minus 162 degrees celsius. Easily and safely transportable, LBG is a reliable fuel solution for trucks, buses, and more.

CBG: Compressed Biogas. This is biogas compressed to 200-250 bar pressure. CGB is used to supply stations for captive light vehicle fleets, cars, semi-trailer trucks, vans or buses. CNG is in a gaseous state, stored in bundles.

Natural gas

A versatile energy source

Natural gas is a high-performance and extremely flexible fuel that can be used for virtually every imaginable energy purpose. Odorless, colorless and non-toxic, it is also the cleanest-burning hydrocarbon and can be used in combination with biogas to further reduce carbon emissions.

Natural gas processing

  • CNG or compressed natural gas is primarily used in vehicles. The gas is compressed to at least 200 bar pressure.
  • LNG or liquified natural gas is  liquefied, refrigerated natural gas. The gas must be cooled to approximately minus 162° celsius to remain liquid at normal pressure.