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Biogas in Denmark
The IDA Climate Plan 2050 looks at agriculture’s do-mestic animal manure (organic fertilizer) and other
types of organic waste being fully utilised for the production of biogas. The expectation is that the utilisation of domestic animal manure will be able to produce 26 PJ energy per year, and that with full uti-lisation of theother raw materials (organic types of waste), it will be possible to produce a further 14 PJ energy. A total of 40-50 large common biogas plants should be established to ensure full utilisation of all of the biogas resource.

The organic raw materials are treated at either a biogas farm plant or a large common biogas plant where the organic materials are degasifed. In order for the process to be able to function, it is currently necessary to mix around 20 % organic(waste) material that is different from domestic animal manure into the plant. In order to avoid lack of other organic waste innovative thinking will be needed with regard to the use of chicken manure and other organic residual products. In the long term, it is estimated that it will be possible to produce biogas exclusively from domestic animal manure. The gas will be delivered to decentralised combined heat and power plants that can relatively easily be transformed from natural gas to full or partial biogas input.In The IDA Climate Plan 2050, the biogas plants should supply both electricity and heating. In order to ensure the total supply reliability of the energy systems, the biogas will be stored and form part of the electricity production during the plants’ own production or at the nearest combined heat and power plant/fuel cell plant or through the natural gas mains. The plants that produce their own electricity will be connected to those responsible for the mains through intelligent control technologies. The potential for additional production of biogas at 20 PJ when using more organic material, such as algae and grasses, maize etc. from new areas will be in place in 2050. A production goal of approximately 40 PJ is included in Climate Plan 2050 based on other considerations such as renewable agricultural and land use. Limitations on and any fall in animal pro-
duction in Denmark and thereby the volume of ani-mal manure, as well as the potential for different operating methods to utilize manure for biogas, will mean that the plan is not based on a higher biogas proportion. Climate Plan 2050 is robust enough to integrate and convert to a large proportion of biogas provided that the future clears the way for this potential. The biogas will be stored in quantities so that these can function as the sole electricity suppliers for a specifed period. Today, the biogas producers only have the option of establishing their own supply to selected customers. This takes place to a very limited extent with heating sales to surrounding neighbours. 



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