However, feeding biomethane into the natural gas grid enables even more versatile application possibilities, since biomethane, unlike biogas, is not tied to a specific location and can thus be procured on a mass-balance basis wherever there is a gas exit point. The decoupling of production and use through the well-developed natural gas grid in Germany enables biomethane to be used seasonally, especially during times when fluctuating renewable energies produce limited electricity. Biomethane can thus be used as a longer-term storage for renewable energies, decoupled from place and time. In addition, biomethane enables direct heat generation to supply inner cities with renewable heat, e.g. in existing heating and condensing boilers. The use of biomethane as a fuel in the transport sector is also very promising, as it can be used in natural gas vehicles without further conversion. The use in transport sectors without renewable alternatives also makes biomethane very valuable, e.g. in liquid form in heavy-duty transport, but also in the maritime sector, so that biomethane can contribute to the successful decarbonisation of these sectors.

In addition to the production and marketing of biomethane, it is also possible to recover and liquefy the CO2 contained in biogas using appropriate systems. The liquefied CO2 can then be sold to companies as a technical gas or used in the food industry (as an additive in beverages or for cooling and preservation). CO2 liquefaction leads to a reduction in CO2 emissions and thus to a significantly better CO2 balance of biomethane production.