An alginate-loofa matrix was developed as a cell carrier for ethanol fermentation owing to its porous structure and strong fibrous nature. The matrix was effective for cell immobilization and had ...good mechanical strength and stability for long-term use. After a storage period of 4 months, yeast cells remained firmly immobilized and active.
Alumina-doped alginate gel as a cell carrier for ethanol production in a packed-bed bioreactor Mongkolkajit, Jirawan, Chulalongkorn University, Bangkok, Thailand; Pullsirisombat, Jiranan, Chulalongkorn University, Bangkok, Thailand; Limtong, Savitree, Kasetsart University, Bangkok, Thailand ...
Biotechnology and bioprocess engineering,
06/2011, Letnik:
16, Številka:
3
Journal Article
Recenzirano
Alumina-doped alginate gel (AEC) was developed as a new type of cell carrier to be used in ethanol fermentation. The presence of the alumina particles in alginate gel not only improved the porous ...structure of the carrier, but also provided many advantageous characteristics including good mechanical strength, high stability, and high immobilization yield. The attachment of alumina particles and yeast cells by electrostatic attraction was shown to promote cell growth and increase ethanol productivity. The AEC carrier was found to be more effective for the immobilization of Saccharomyces cerevisiae M30 than the conventional Ca-alginate bead. Ethanol productivities of 1.4 and 7.9 ~ 12.6 g/(L/h) were obtained using the AEC cultures in batch and continuous modes of operation, respectively, with an ethanol yield of 43.9 ~ 46.7% and an immobilized yield of 81.4 ~ 84.5%. Ethanol fermentation in a continuous packed-bed reactor using the AEC carrier was stable for greater than 30 days.
