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Gewählte Master / Diploma Thesis:

Guenter Mair (2010): Biogaserzeugung aus biogenen agrarischen Reststoffen, Optimierung im Labor und Validierung unter Praxisbedingungen.
Master / Diploma Thesis - Institut für Landtechnik, BOKU-Universität für Bodenkultur, pp 112. UB BOKU obvsg

Data Source: ZID Abstracts
A consistent use of renewable energy sources has enormous significance for the future. The enormous world's growing energy needs, rising energy prices, exhaustible sources of fossil fuels, the growing climate and environmental issues cause a change in awareness and call for a massive expansion of energy supply from renewable sources. Energy production from biogas from agricultural raw materials, especially from biogenic byproducts of food processing is a very promising option, especially in terms of electricity and heat production. This situation poses specific requirements on the management of a biogas plant. The temporal availability of raw materials, the storage behavior, biology and the degradation of the different nutrient levels make it necessary to define an optimal mixture ratio of raw material components and thereby ensure a maximum methane yield. This diploma thesis investigated the effect of different modes of operation and the use of additives in laboratory studies on the formation of biogas. The relevant process parameters were simulated under lab conditions and then validated on a commercial biogas plant. In a monitoring the material flow rates and process parameters were collected. The individual biogenic raw materials (beet silage, spent grain, vegetable waste, lecithin, flotation fat) were analyzed for their composition and their specific biogas production was measured in batch experiments. From a range of mixtures of the optimal combination of raw materials was identified. In the continuous anaerobic test, the volume load, different application rate of the additive "Deuto Clear" and high rates of carton packages were examined. Energy efficiency can be improved by rising up the loading rate from 2.0 kg oTS/(m³•d) to 3.5 kg oTS/(m³•d). An increased dosage of the additive showed no significant yield increase and the packaging material was neutral in the fermentation process. It was observed on farm and in the laboratory that an almost identical methane yield was achieved in fermentation of substrate from the mixing pit of the biogas plant.

Beurteilende(r): Amon Thomas
1.Mitwirkender: Bauer Alexander

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