Year-end Sale % OFF 
Abstract
A high-cell-concentration culture of Propionibacterium acidi-propionici in a fermenter with recycling through a tangential membrane filtration unit is described. Circulation rate and fermentation start-up procedures are discussed in order to optimize the system performance and the operation at high dilution rates. Maximum cell concentrations up to 140 g dry weight/l were obtained, with a propionic acid productivity of 10.3 g/l hr and a product yield of 0.56 g propionic acid/g glucose. Rheological studies showed that at cell mass concentrations above 90-100 g/1 the fermentation broth viscosity increased rapidly and changed its behaviour from Newtonian to pseudoplastic. The use of an adequate cell bleed rate allowed the cell concentration to be maintained at a desirable value and consequently to stabilize the reactor operation.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
