IN A NUTSHELL!
WHAT IS BIOGAS?
Significance for the energy transition!
Biogas is an energy-rich gas mixture that is produced when organic material decomposes naturally in the absence of air. This decomposition process is technically used in biogas systems to produce biogas from liquid manure, organic waste or energy crops. The substrates are fermented in airtight fermentation vessels – the so-called digesters. This process requires many different microorganisms.
Combustible methane (CH4) is the key component of biogas. Based on the substrates used the methane content varies between 50 and 65 %. It also contains between 35 and 50 % carbon dioxide (CO2) and small amounts of other elements such as nitrogen, water, oxygen and hydrogen sulphide.
Biogas can be converted into electricity, heat, gas or fuel. Therefore, it is sometimes referred to as a universal fuel. The remaining digestate is a high-quality fertiliser rich in humus-forming substances and nutrients. It is used in liquid or dried form in agriculture, landscape construction, gardening and in private gardens as an organic fertiliser or soil conditioner.
The digestate contains the nutrients contained in the original substrates, such as nitrogen, phosphorus, potassium and organic carbon. The use of digestate thus closes the natural nutrient and humus cycle and replaces mineral fertilisers which have to be produced in an energy-intensive manner.
THE GERMAN BIOGAS ASSOCIATION
The German Biogas Association (Fachverband Biogas e. V.) brings together operators, manufacturers and planners of biogas plants, representatives from science and research institutions and stakeholders in Germany. It advocates the use of biogas technology through intensive political lobbying at the federal and federal state level.
The Renewable Energies Agency (Agentur für Erneuerbare Energien e. V. – AEE) works to convince people of the benefits of the energy transition. We present the opportunities and advantages of a sustainable energy supply and promote greater acceptance within society.