University of Natural Resources and Life Sciences, Vienna (BOKU) - Research portal
Gewählte Master / Diploma Thesis:
Franz Theuretzbacher
(2012):
Erzeugung von Biogas aus extensiv produzierter Grünlandbiomasse - Vorbehandlung durch Steam Explosion und Optimierung der Zeit-Temperaturkombination.
Master / Diploma Thesis - Institut für Landtechnik,
BOKU-Universität für Bodenkultur,
pp 77.
UB BOKU
obvsg
FullText
- Abstract:
- Keeping the agricultural production in the alpine area alive is of a high importance for ecological and social reasons. If greenland areas are not cultivated any more forests would take their place and this could have negative influences on the biodiversity and on the attractiveness of the Alps as an area to live in. Reasons for abandonment of greenland agriculture are mostly economically. Producing agricultural goods in mountain areas is more expensive than in preferential areas. A possible solution for this problem could be an alternative use of grassland biomass for energy production. The use of greenland biomass for producing biogas would serve the goal of the European Union to reduce climate gas. Through new working places the attractiveness of the Alps for the people would experience a positive development. For being able to produce biogas out of greenland biomass that is produced in an extensive kind of way, it is necessary to apply a pretreatment step before putting the biomass into the fermenter. Using the steam explosion the biomass is pretreated with hot steam under pressure. During the pretreatment it comes to thermal processes with degrade Cellulose and Hemicellulose to monomers and other reaction products. Steam is suddenly released then and with the water vaporizing at once there is also a mechanical pretreatment applied. The energy needed for warming up the process water can be taken from the engine used for power production out of the biogas. For optimizing the pretreatment through steam explosion it is necessary to find the best combination out of pretreatment temperature and time. Pretreatment conditions applied were between 160°C and 220°C. Residence time of the material in the tank ranged between 5 and 20 minutes.
- Beurteilende(r): Amon Thomas
- 1.Mitwirkender: Bauer Alexander