Increased oxygen transfer in a yeast fermentation using a microbubble dispersion
| dc.contributor.author | Kaster, Jeffrey Allen | en |
| dc.contributor.department | Chemical Engineering | en |
| dc.date.accessioned | 2019-03-26T19:17:04Z | en |
| dc.date.available | 2019-03-26T19:17:04Z | en |
| dc.date.issued | 1988 | en |
| dc.description.abstract | The use of a microbubble dispersion (MBD) for oxygen transport in a yeast fermentation was studied. No surfactants were added to the fermentations; the microbubbles were formed using only the surfactants naturally produced by the yeast. The growth rate of a Saccharomyces cerevisiae culture was found to be almost twice as great for a microbubble dispersion sparged fermentation, as for a gas sparged fermentation when equivalent volumes of air or microbubble dispersion were used. The growth rate of the MBD sparged fermentation was 0.108/hr, as opposed to 0.068/hr for the air sparged fermentation. Oxygen transfer rates were measured by the yield coefficient, dynamic, and direct methods. The oxygen transfer coefficient was found to be approximately 190/hr and independent of the fermenter impeller speed, over the range of 100 - 580 RPM, for the micro bubble dispersion fermentation. Over the same range, the oxygen transfer coefficient for the air sparged fermentation rose from 55 to 132/hr. The power requirements for the fermenter systems were estimated. It was determined that a five fold reduction in the fermenter to MBD generator volume ratio could be made. | en |
| dc.description.degree | Master of Science | en |
| dc.format.extent | ix, 100 leaves | en |
| dc.format.mimetype | application/pdf | en |
| dc.identifier.uri | http://hdl.handle.net/10919/88601 | en |
| dc.language.iso | en_US | en |
| dc.publisher | Virginia Polytechnic Institute and State University | en |
| dc.relation.isformatof | OCLC# 18344615 | en |
| dc.rights | In Copyright | en |
| dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | en |
| dc.subject.lcc | LD5655.V855 1988.K377 | en |
| dc.subject.lcsh | Yeast | en |
| dc.subject.lcsh | Fermentation | en |
| dc.subject.lcsh | Electrodes, Oxygen | en |
| dc.title | Increased oxygen transfer in a yeast fermentation using a microbubble dispersion | en |
| dc.type | Thesis | en |
| dc.type.dcmitype | Text | en |
| thesis.degree.grantor | Virginia Polytechnic Institute and State University | en |
| thesis.degree.level | masters | en |
| thesis.degree.name | Master of Science | en |
Files
Original bundle
1 - 1 of 1