Dynamics of yeast immobilized-cell fluidized-bed bioreactors systems in ethanol fermentation from lactose-hydrolyzed whey and whey permeate
| Autor: | Sabrina Gabardo, Plinho Francisco Hertz, Manuela P. Klein, Rosane Rech, Gabriela Feix Pereira, Marco Antônio Záchia Ayub |
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| Rok vydání: | 2015 |
| Předmět: |
0106 biological sciences
020209 energy Lactose Bioengineering Saccharomyces cerevisiae 02 engineering and technology Ethanol fermentation 01 natural sciences Kluyveromyces chemistry.chemical_compound Bioreactors Kluyveromyces marxianus Whey 010608 biotechnology 0202 electrical engineering electronic engineering information engineering Bioreactor Ethanol fuel Food science Ethanol biology Chemistry General Medicine Cells Immobilized biology.organism_classification Coculture Techniques Yeast Biochemistry Industrial and production engineering Biotechnology |
| Zdroj: | Bioprocess and Biosystems Engineering. 39:141-150 |
| ISSN: | 1615-7605 1615-7591 |
| DOI: | 10.1007/s00449-015-1498-0 |
| Popis: | We studied the dynamics of ethanol production on lactose-hydrolyzed whey (LHW) and lactose-hydrolyzed whey permeate (LHWP) in batch fluidized-bed bioreactors using single and co-cultures of immobilized cells of industrial strains of Saccharomyces cerevisiae and non-industrial strains of Kluyveromyces marxianus. Although the co-culture of S. cerevisiae CAT-1 and K. marxianus CCT 4086 produced two- to fourfold the ethanol productivity of single cultures of S. cerevisiae, the single cultures of the K. marxianus CCT 4086 produced the best results in both media (Y EtOH/S = 0.47-0.49 g g(-1) and Q P = 1.39-1.68 g L(-1) h(-1), in LHW and LHWP, respectively). Ethanol production on concentrated LHWP (180 g L(-1)) reached 79.1 g L(-1), with yields of 0.46 g g(-1) for K. marxianus CCT 4086 cultures. Repeated batches of fluidized-bed bioreactor on concentrated LHWP led to increased ethanol productivity, reaching 2.8 g L(-1) h(-1). |
| Databáze: | OpenAIRE |
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