CO2 Relevance of feeding of biogas from sewage sludge utilisation into the grid
Abstract
On 21.12.2018, the Directive on the promotion of the use of energy from renewable sources, the Energy Efficiency Directive and the Governance Regulation were published in the Official Journal of the EU. Member States should therefore ensure that the share of energy from renewable sources in the Union's gross final energy consumption in 2030 is at least 32%. For Austria, the target for the share of energy from renewable sources in gross final energy consumption in 2020 is already 34%. This is the third highest target after Sweden (49%) and Finland (38%). The Directive on the promotion of the use of energy from renewable sources sets sustainability and greenhouse gas saving criteria for biofuels, bioliquids and biomass fuels (Article 10). However, the use of biomethane for feeding into the natural gas network (biogas) from sewage sludge also means a large reduction in greenhouse gases compared to fossil fuels, mainly due to the given calculation requirements (greenhouse gas savings from waste and residues are set at zero until these materials are collected). For the first time, a comprehensive greenhouse gas balance is carried out for a biomethane to be fed into the natural gas grid (biogas) by using the sewage sludge of the Wiener Neustadt Süd biogas plant, taking into account the method specified in Annex VI/B of the Directive on the Promotion of the Use of Energy from Renewable Sources. In a second step, the greenhouse gas savings are analysed by comparison with fossil energy sources. If necessary, the results can be transferred to other Austrian plants.
keywords CO2 Climate impact LCA
Publikationen
Project staff
Gudrun Obersteiner
Dipl.-Ing. Dr. Gudrun Obersteiner
gudrun.obersteiner@boku.ac.at
Tel: +43 1 47654-81319
Project Leader
01.06.2019 - 30.09.2019