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首页> 外文期刊>Bioprocess and Biosystems Engineering >Dynamics of yeast immobilized-cell fluidized-bed bioreactors systems in ethanol fermentation from lactose-hydrolyzed whey and whey permeate
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Dynamics of yeast immobilized-cell fluidized-bed bioreactors systems in ethanol fermentation from lactose-hydrolyzed whey and whey permeate

机译:酵母固定化细胞流化床生物反应器系统在乳糖水解乳清和乳清渗透液中乙醇发酵中的动力学

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摘要

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).
机译:我们研究了酿酒酵母和非工业菌株的固定化细胞的单次和共培养,研究了间歇流化床生物反应器中乳糖水解乳清(LHW)和乳糖水解乳清渗透物(LHWP)上乙醇生产的动力学。马克斯克鲁维酵母。尽管酿酒酵母CAT-1和马克斯克鲁维酵母CCT 4086的共培养产生的啤酒产量是酿酒酵母单次培养的2到4倍,但马克斯克鲁维酵母CCT 4086的单一培养在这两种情况下均产生了最好的结果。介质(Y(EtOH / S)= 0.47-0.49 gg(-1)和Q(P)= 1.39-1.68 g L-1 h(-1),分别在LHW和LHWP中)。浓缩LHWP(180 g L-1)上的乙醇产量达到79.1 g L-1,对于马克斯克鲁维酵母CCT 4086培养物,其产量为0.46 g g(-1)。在浓缩的LHWP上重复批次的流化床生物反应器导致乙醇生产率提高,达到2.8 g L-1 h(-1)。

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