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Master-Thesis: High value Products via Sustainable Technologies from Residual Streams

Biogenic residue streams contain high-value components, such as amino acids, proteins, liquids, acids and sugars. The sustainable valorization of plant-based protein and sugar fractions is of particular interest, since the demand for plant protein and amino acids is globally increasing as well as the use of sugar-based chemicals.

This diploma thesis is embedded into the framework of a national project on developing of
an energy- and resource-efficient key technology for the extraction valuables at high yields from biogenic residues of the food industry.

In this master thesis, lab studies in the fully equipped OFR (oscillating flow reactor) laboratory at AEE INTEC in Gleisdorf will be conducted. Chemical and enzymatic extraction routes, i.e. with direct use of the biomass and continuous process control will be examined.
This includes experiments with (if necessary) pretreatment/crushing (milling/screening) of cellulose and or other raw materials, at different temperatures (°C) , experimental durations (h), flow rates (l/h), amplitudes (mm), frequencies (Hz), concentration ratios (g spent grains/extractant). In addition, the sampling strategy and extractant regeneration/recycling play an important role, and will be worked out accordingly. During the tests, heat transfer and energy demand (via temperature measurements; flow measurements; pump energy measurements), as well as rheological parameters (residence time measurement, velocity ratio, viscosity measurement) are continuously recorded.

  • Design of Experiment for lab tests at OFR
  • Processing of experimental data and evaluation of best suited operating conditions
  • Literature research on recently published data
  • Elaboration of optimization concepts
  • Integration into biorefinery context


Start from autumn 2023 in Gleisdorf, Austria.