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Gewählte Master / Diploma Thesis:

Christine Lattenmayer (2001): Preliminary Evaluation of Growth Kinetics with Ammonium as Nitrogen Source in the Photonautotrophic Compartment of MELISSA.
Master / Diploma Thesis, BOKU-Universität für Bodenkultur. UB BOKU obvsg

Data Source: ZID Abstracts
Abstract:
MELiSSA is a micro-ecological life support system alternative designed for long-term manned space missions. Its task is the gradual recovering of edible biomass, water and oxygen from carbon dioxide, faeces, urea and other wastes by micro-organisms and higher plants. The study focusses on the photosynthetic compartment IV colonised by the alga Arthrospira platensis. It is essential for the regeneration of oxygen and the production of food and water. As the oxidation of NH4+ to NO3- in compartment III is a critical point and due to the possibility of NH4+ instead of NO3- entering compartment IV, the main task of this thesis is the demonstration of the ability of cultivating the organism and the investigation of its behaviour under NH4+ as the sole nitrogen source. Furthermore the resulting effects on the health of the crew concerning oxygen availability and gas contaminants are analysed. As NH3 causes toxic effects on the algae at higher concentrations, also a preliminary approach to determine the toxic level is done.

Beurteilende(r): Bayer Karl

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