At the end of the Second World War, due to the shortage of electricity from oil and natural gas, in Germany appeared the first biogas plant within few farms. In fact, farmers themselves can obtain cheaply biogas from the digestion of cattle and sheep manure. These first trials disappear during the coming 50 years to improve the general economic level of the country.
The problem of the cost of energy comes back again with the two oil crises of the 70s and lead experts to propose a more detailed studies on biogas. This new phase is a setback to the new boom that began in the mid-80s and continues to this day.
In Germany, biogas plants spread in recent years thanks to the Energies Act of 1992 : it guarantees fixed amounts for all producers of electricity fed into the public grid and produced from renewable sources. This economic security in return has allowed a greater diffusion of private investment in the energy sector, supported by a new law passed in February 2000 that provides new and even more affordable amounts for each product KW ( € 0.22 per Kw ) for a period of 20 years.
This law together with the improvement of technological knowledge has led to a boom of plants in Germany which now numbers nearly 6,000 agricultural units, of which 1,200 made in only in 2010. The industry recycles waste materials in 210 facilities and the community in nearly 1,000 plants, including 200 from the reuse of organic waste, energy and heat.