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Gewählte Master / Diploma Thesis:

Susanne Frühauf (2014): Potentialanalyse biogener Roh-, Rest- und Abfallstoffe für die Einbringung in eine Biogasanlage in der Gemeinde Lech am Arlberg.
Master / Diploma Thesis - Institut für Landtechnik, BOKU-Universität für Bodenkultur, pp 124. UB BOKU obvsg

Data Source: ZID Abstracts
Since the last decades we observe a steady decline of agricultural farms in alpine regions. The reduced management of pasture areas subsequently enhances forestation in these areas. This process of succession has numerous negative effects on different sectors, including tourism, which further tend to be reinforced by climate change. During summertime, the typical alpine meadows attract leisure travelers and in winter grassland is the central basis for various winter sports attractions. Due to a stable sod, soil is secured from erosions, which protects from avalanches, landslides and other natural hazards. To preserve an open countryside, in the absence of agricultural farming, alternative management concepts are required. Grassland biomass processed in a biogas plant to produce renewable energy is therefore seen as a sustainable alternative. Additionally, other biogenic materials such as food waste, fryer oil, green waste and animal excrements accrue in alpine regions. The aim of this work was to determine and evaluate the technical potentials of these biogenic residues as renewable energy sources for the municipality Lech am Arlberg. Beside the evaluation of the technical potentials, the study provides an overall biogas concept, which includes the logistics, the technical dimensioning and the utilization of the biogas and fermentation residues. For calculating the technical potentials a novel calculation scheme was developed. The main results obtained by these calculations of the potentials show an unused biomass from grassland of 1,186 t DM/year, which correspond to an unused pasture area of 517 ha. Including other biogenic wastes, the total methane potential is around 542,800 Nm3/year. This equals approximately 1.8 GWh of electricity and 1.8 GWh of heat, which can be used for current and local heating networks or i.e. covering 225 % of the local busses fuel demand when using biomethan. The municipality Lech am Arlberg could cover with a biogas plant about 3 % of their total energy requirements.

Beurteilende(r): Gronauer Andreas
1.Mitwirkender: Bauer Alexander

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