Masters Theses
Date of Award
8-1999
Degree Type
Thesis
Degree Name
Master of Science
Major
Chemical Engineering
Major Professor
Paul D. Frymer
Committee Members
Gary Sayler, Charles Moore
Abstract
A hollow-fiber membrane bioreactor system for the continuous production of 2,5-diketo-gluconic acid (2,5-DKG) was constructed and demonstrated. Additionally, key control parameters affecting the production of 2,5-DKG were identified. Pantoea citrea, which possesses three membrane bound enzymes that convert D-glucose into 2,5-DKG, was contained within the extracapillary space of the reactor. The system was designed to provide direct oxygenation to the biomass in the reactor, while liquid nutrients were provided through the intracapillary space. Experiments in which biomass concentration within the reactor and substrate throughput rate were varied identified key operating parameters that control product titre and the volumetric production rate of the system Under the operating conditions used in the experiments, 2,5-DKG concentrations as high as 13 g/L were observed and maintained for 37 hours. Yields as high as 0.54 g 2,5-DKG/g glucose consumed were seen and a maximum volumetric productivity (based upon intracapillary volume) of 3.9 g/L/hr was achieved.
Recommended Citation
Dalton, Matthew Brock, "Development of a hollow-fiber membrane bioreactor system for the continuous production of 2,5-diketo-D-gluconic acid. " Master's Thesis, University of Tennessee, 1999.
https://trace.tennessee.edu/utk_gradthes/9808