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The raw biogas comes from the decomposition of natural organic materials and it is generally consisting of a mixture of methane (50-65%), carbon dioxide and other such called “contaminants”, such as siloxanes, hydrogen sulfide and water.

Recent studies have shown that methane itself, when released into the atmosphere, has got a negative impact on the planet greenhouse effect. In fact, the biogas impact in accelerating the planet climate changes is estimated to be 21 times greater than carbon dioxide. For this reason, any methane releases into the atmosphere must take place after the methane had been oxidised, whilst recovering as much energy as possible all over the oxidising process.



At the present, the most common way of achieving methane oxidation is currently through biogas feed of modified natural gas engines for cogeneration purposes. Besides, a couple more convenient alternatives to the heat and power generation are available, in particular: the bio-methane injection into any private or public gas networks, or the use of it as a vehicle fuel. Both those options do require the raw biogas to be thoroughly cleaned through an appropriate purification process, in order for any contaminants to be removed in accordance with the final product purpose specification (biomethane).



Thanks to its technological know-how gained in the gas treatment and compression fields since 1975, ORB has celebrated the new born biogas division opening, with the biogas new projects or upgrading pilot plants put in operation at different locations. ORB has been keeping optimising and innovating its compression-core products, for providing all Customers with the most reliable and best performing technology. Our portfolio covers all areas of biogas manufacturing – regardless of the raw materials, the size of the biogas plant or the procedure used. By using our solutions, you will maximize your productivity and minimize your operating costs.

ORB’s Solutions Advantages


Turnkey solutions, offering a complete system from the digester to the high-pressure compressor for vehicles refueling, or re-injection into the pipeline network

Biogas purification systems

Compressors for biomethane



Reducing and metering cabinets

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