Data/hora: 09/06/2024 06:32:47

Provedor de dados: | 58
País: | Brazil
Título: | High-temperature ethanol production using thermotolerant yeast newly isolated from Greater Mekong Subregion
Autores: | Techaparin,Atiya; Thanonkeo,Pornthap; Klanrit,Preekamol.
Data: | 2017-07-01
Ano: | 2017
Palavras-chave: | Thermotolerant yeast; Box-Behnken experimental design; Response surface method; Ethanol production; Sweet sorghum juice (SSJ).
Resumo: | Abstract The application of high-potential thermotolerant yeasts is a key factor for successful ethanol production at high temperatures. Two hundred and thirty-four yeast isolates from Greater Mekong Subregion (GMS) countries, i.e., Thailand, The Lao People's Democratic Republic (Lao PDR) and Vietnam were obtained. Five thermotolerant yeasts, designated Saccharomyces cerevisiae KKU-VN8, KKU-VN20, and KKU-VN27, Pichia kudriavzevii KKU-TH33 and P. kudriavzevii KKU-TH43, demonstrated high temperature and ethanol tolerance levels up to 45 °C and 13% (v/v), respectively. All five strains produced higher ethanol concentrations and exhibited greater productivities and yields than the industrial strain S. cerevisiae TISTR5606 during high-temperature fermentation at 40 °C and 43 °C. S. cerevisiae KKU-VN8 demonstrated the best performance for ethanol production from glucose at 37 °C with an ethanol concentration of 72.69 g/L, a productivity of 1.59 g/L/h and a theoretical ethanol yield of 86.27%. The optimal conditions for ethanol production of S. cerevisiae KKU-VN8 from sweet sorghum juice (SSJ) at 40 °C were achieved using the Box-Behnken experimental design (BBD). The maximal ethanol concentration obtained during fermentation was 89.32 g/L, with a productivity of 2.48 g/L/h and a theoretical ethanol yield of 96.32%. Thus, the newly isolated thermotolerant S. cerevisiae KKU-VN8 exhibits a great potential for commercial-scale ethanol production in the future.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822017000300461
Editor: | Sociedade Brasileira de Microbiologia
Relação: | 10.1016/j.bjm.2017.01.006
Formato: | text/html
Fonte: | Brazilian Journal of Microbiology  v.48 n.3 2017
Fonte: | info:eu-repo/semantics/openAccess