Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.9/2852
Título: New dual-stage pH control fed-batch cultivation strategy for the improvement of lipids and carotenoids production by the red yeast Rhodosporidium toruloides NCYC 921
Autor: Dias, Carla
Sousa, Sofia
Caldeira, João
Reis, Alberto
Silva, Teresa Lopes da
Palavras-chave: Biomass
Carotenoids
Fatty acids
Rhodosporidium toruloides 
Data: 2015
Editora: Elsevier
Citação: Dias, C.; Sousa, S.; Caldeira, J.; Reis, A.; Silva, T.L. da - New dual-stage pH control fed-batch cultivation strategy for the improvement of lipids and carotenoids production by the red yeast Rhodosporidium toruloides NCYC 921. In: Bioresource Technology, 2015, Vol. 189, p. 309-318
Resumo: The optimal medium pH to produce biomass and fatty acids by the red yeast Rhodosporidium toruloides NCYC 921 is 4.0, and to produce carotenoids is 5.0. Based on this difference, a dual-stage pH control fed-batch cultivation strategy for the enhancement of lipids and carotenoids production by this yeast was studied. The results showed that when the yeast growth phase was conducted at pH 4.0, and the products accumulation phase was conducted at pH 5.0, biomass, total fatty acid and total carotenoid productivities were significantly improved comparing with the yeast fed batch cultivations carried out at fixed medium pH (4 or 5). Under dual-stage pH control conditions, the biomass, carotenoids and lipids productivities attained 2.35 g/L h, 0.29 g/L h and 0.40 g/L h, respectively. It was also observed that the oxygen played a major role in the yeast carotenoid production.
URI: http://hdl.handle.net/10400.9/2852
ISSN: 0960-8524
Versão do Editor: http://dx.doi.org/10.1016/j.biortech.2015.04.009
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