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Biogas and methane filtration


Biogas & gas filtration 16 & 25 bar

Omvendt Osmose

Biogas consists primarily of methane and carbon dioxide. The distribution is usually around 60% methane (CH4) and 40% carbon dioxide (CO2). However, it can vary quite a lot, depending on the type of waste used in the production of the final product. It will often be distributed as follows: 45-75% methane and 55-25% carbon dioxide.

Biogas can also contain siloxanes, hydrogen sulphide and a little moisture.

To get an end product that is as clean as required, the biogas must be free of oil and liquid. This is done i.a. by means of filtration with P-ED or SG filter housing with an inserted HT-NX filter. The filter can handle up to 180°C and is therefore extremely suitable for biogas.

P-ED filter housings are PED approved Fluid group 1 – available with ASA or Flange connection at 25 bar.


P-ED & SG Filter housing
Housing type P-ED SG
Max. Temperature 180°C 120°C
Material SS316L Steel
Pressure 25 bar 16 bar

About Biogas

Biogas – or as many call it; biomethane – is a type of renewable fuel produced by the decomposition of organic matter. It can, for example, be food scraps, plant material, municipal waste and not least animal manure. A biogas plant uses anaerobic decomposition - which means that the decomposition takes place in an oxygen-free environment. By using this type of decomposition, these organic materials are converted into biogas. Biogas can be used for many different purposes, but is mostly used as fuel for vehicles, heating and electricity production.

Where is biogas used?

The combustion of biomethane from vehicles is more environmentally friendly than the combustion of the fuels we know today, such as petrol and diesel. Therefore, biogas is eligible for support under the commitment to renewable transport fuels. Of examples of renewable transport fuels in i.a. vehicles formed from biogas include compressed natural gas (CNG) and liquefied natural gas (LNG).

Electricity can also be produced using biogas – this is done by burning it. Electricity is easier to transport and measure than heat and gas supply, but on the other hand requires the right infrastructure to be included in the grid, which is both extensive and costly.

Biogas is further used in the hotel & restaurant industry, production & manufacturing companies, as well as in the retail & wholesale trade.

The main advantages of biogas

There are many reasons why biogas technology is a good alternative to other technology. First and foremost because the raw material used is very cheap. In agriculture, it is practically free, as the biogas can be used for a number of household and agricultural purposes.

When the biogas is burned, no harmful gases are produced and therefore biogas is described as environmentally clean.

One of the most practical advantages of biogas is that the technology required for production is in many cases quite simple and can be produced on both a small and large scale, without the need for large initial capital investments.

As this type of energy is a renewable and clean energy source based on a carbon-neutral process, no new amounts of carbon are released into the atmosphere when using biogas. In addition, it helps to avoid depositing food waste, which has a positive impact on the environment and the economy. At the same time, biogas also helps to reduce soil and water pollution from animal and human waste, making it possible to maintain a healthy and safe environment for communities worldwide.

Since methane contributes to climate change, biogas helps to reduce the emission of methane into the atmosphere, which in turn helps to counteract climate change and thus can help to reduce the immediate impact on the environment.

Biogas - Is it good or bad?

In short, biogas is an excellent source of clean energy, as it has a smaller impact on the environment than the fossil fuels we use in large quantities. Although biogas does not have a zero impact on ecosystems, it is carbon neutral.

This is because biogas i.a. is produced from plant material that has previously bound carbon from carbon dioxide in the atmosphere. A balance is maintained between the amount of carbon released as a result of biogas production and the amount of carbon absorbed from the atmosphere.