Ethanol fermentation by flocculent yeast: on the kinetics of biomass accumulation
A widespread interest has been noted in continuous-power ethanol fermentation utilizing systems with strong biomass accumulation. Flocculent yeast systems require not additional mechanical complexity to reach biomass levels on the order of 60-90 g/L. This is achieved by coupling a decantor to a fermentor, taking advantage of the fact the flocs may easily settle. the general performance of yeast floc reactors have been established: the high biomass levels achieved allow efficient ethanol conversion (40-80 g/L) and high productivities (10-18 g/L h) for 100-190 g/L glucose concentration in the feed with practically total conversion of substrate. The present communication gives additional information on the kinetics of a continuous flocculent yeast reactor operating under transient conditions. We give insight into the optimization of the startup operation.
- Research Organization:
- Instituto de Pesquisas Tecnologicas, IPT, Sal Paulo, Brazil
- OSTI ID:
- 5695577
- Journal Information:
- Biotechnol. Bioeng.; (United States), Vol. 30:2
- Country of Publication:
- United States
- Language:
- English
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