What is biomethane?

Biomethane - The green gas with great potential

What is biomethane? Biomethane, also known as renewable natural gas or green gas, is a sustainable energy source obtained by processing biological waste and organic materials. It is often used as a high-quality substitute for fossil natural gas and offers a variety of environmentally and climate-friendly applications.

Biomethane - sustainable energy for a greener future

Biomethane is a major player in the energy sector and is playing an increasingly important role in the fight against climate change. As a renewable green gas, it is produced from various biological sources, including agricultural waste, organic residues and even sewage sludge. Biomethane is produced through a process called anaerobic digestion, in which microorganisms decompose the biological materials and produce methane.

The advantages of biomethane are numerous. Firstly, it is an environmentally friendly alternative to fossil natural gas. Biomethane is obtained from renewable raw materials, which leads to a significant reduction in greenhouse gas emissions. In addition, biomethane can be fed directly into the existing natural gas grid and used for various purposes.

One of the main applications of biomethane is in decentralised energy generation. Biomethane can be used to generate heat and electricity in households, commercial areas and even industrial plants. It can also be used as a fuel for vehicles, reducing the carbon footprint of the transport sector. The use of biomethane also offers the possibility of storing and supplying energy, which is particularly advantageous in times of peak loads.

Biomethane is also an important component of a sustainable circular economy. By utilising biological waste and residual materials, resources are used efficiently and landfill sites are relieved at the same time. It also promotes regional development, as biomethane plants are often operated locally and create local jobs.

Overall, biomethane offers a promising solution for the energy transition. It is an environmentally friendly alternative to fossil fuels, helps reduce greenhouse gas emissions and promotes a sustainable circular economy. With the increasing demand for renewable energy, biomethane is becoming an important part of our greener future.

Explanations on biomethane

Along with carbon dioxide and other gases, biomethane is a product of processed biogas.

Biomethane and biogas are two different energy sources that can be obtained from organic materials. In simple terms, it can be said that biomethane is obtained from biogas through a purification process. This is why biomethane is often equated with biogas. It has the advantage that it has a higher energy density than biogas and can therefore be utilised more efficiently. Biomethane can also be fed into the existing natural gas grid. This means that it can be utilised in another region and even stored in existing natural gas storage facilities.

To summarise, biomethane is the methane produced from biogas, which is obtained through additional processing and can be used as a renewable fuel and to generate electricity and heat. The methane content of biogas is between 50-60%.

Biomethane is a good energy source for several reasons:

Renewable: Biomethane is produced from organic waste and renewable raw materials from agricultural, urban or industrial sources. As these materials are constantly renewable or are produced anyway and, unlike fossil fuels, cannot be depleted, biomethane is a renewable energy source.
Climate protection: The combustion of biomethane only produces as much CO2 as the source materials absorbed during their growth. This means that biomethane is much more climate-friendly than fossil fuels such as crude oil or natural gas. Biomethane is therefore a low-carbon energy source that releases fewer greenhouse gases (GHG) during combustion than fossil fuels. In addition, the use of biomethane from organic waste prevents methane emissions into the atmosphere, which are much more harmful to the climate than carbon dioxide.
Flexibility: Biomethane can be used in various areas, e.g. as a fuel in transport, to generate electricity and heat. Like natural gas, it can be transported and utilised in existing gas networks. In this way, it can help to reduce dependence on fossil fuels.
IndependenceBiomethane can be produced regardless of the weather. Solar and wind energy can only be produced in appropriate weather conditions.
Circular economy: Biomethane is often produced from organic waste that would otherwise have to be disposed of. Biomethane production allows this waste to be utilised sensibly and creates a closed cycle.
Regionality: Biomethane plants can be operated on a decentralised basis, i.e. they can be built close to the source materials. This saves on transport routes and costs and creates regional added value.
Job creation: The production of biomethane creates jobs in agriculture, transport and logistics as well as in the biogas and gas industry.
Local energy supply: Biomethane can be produced locally, which reduces dependence on domestic and foreign energy suppliers.
Economic efficiency: Biomethane can be economically attractive if it is obtained from organic waste and residual materials that are already available in the neighbourhood. There are also government subsidy programmes that support the use of biomethane.

Overall, biomethane offers a promising alternative to fossil fuels and can help to drive forward the energy transition.

Biomethane, also known as renewable methane or bio natural gas, is a sustainable energy source derived from organic materials. It is created through a process called biomethanisation, in which biological raw materials are broken down under controlled conditions to produce methane. This article gives you a detailed insight into the creation of biomethane and the steps involved in its production.

Selection of organic raw materials:

The production of biomethane requires biological raw materials that serve as substrates. Typically, organic materials such as plant biomass, organic waste from agriculture, industry or households are used. These raw materials can take various forms, including energy crops such as maize, grass, rapeseed or slurry, manure and waste such as food waste, sewage sludge or biowaste.

Pre-treatment of raw materials:

Before the raw materials can be fed into the biomethanisation process, they must be partially pre-treated in order to optimise their composition. This can include shredding, drying or fermentation to make the biomass easier to break down and maximise the methane yield.

Anaerobic fermentation:

The next step is to subject the pre-treated raw materials to anaerobic fermentation. This process takes place in special containers known as fermenters or bioreactors. These containers provide optimal conditions for the activity of microorganisms that break down the organic materials and produce methane. Anaerobic digestion takes place in an oxygen-free environment, as the microorganisms involved work under anaerobic conditions.

Biogas production:

During anaerobic digestion, organic materials are decomposed by microorganisms. This produces various gases, mainly methane (CH4) and carbon dioxide (CO2), as well as small quantities of trace gases such as hydrogen (H2) and hydrogen sulphide (H2S). This gas mixture is known as biogas and contains around 50-75% methane.

Treatment of the biogas:

The biogas produced must be purified and treated before it can be used as biomethane. In this step, the carbon dioxide, hydrogen and other impurities are removed from the biogas in order to achieve a higher methane content. Treatment can be carried out using various technologies such as absorption, adsorption or membrane separation.

Methane purification:

To further improve the quality of the biomethane, it is often subjected to methane purification. This removes the remaining impurities such as sulphur compounds, moisture and other trace gases