Evaluation of Rice Bran Extract as a Nitrogen Source for Improved Hemicellulosic Ethanol Production from Sugarcane Bagasse by New Xylose-Fermenting Yeast Strains Isolated from Brazilian Forests

Production of bioethanol in sugarcane bagasse hemicellulosic hydrolysate byScheffersomyces parashehatae,Scheffersomyces illinoinensisandSpathaspora arborariaeisolated from Brazilian ecosystems

“…Its ethanol yield and productivity were 0·14 g g −1 and 0·04 g l −1 h −1 , respectively, in detoxified, supplemented acid sugarcane bagasse hemicellulosic hydrolysate (Martiniano et al . ), and a yield of 0·38 g g −1 has been achieved in a nonsupplemented, acid‐enzymatic soybean hull hydrolysate cultured with immobilized cells (Hickert et al . ).…”

“…These strains have been previously studied during the description of this species ). Studies concerning D-xylose fermentation by this yeast have been performed using only the type strain, UFMG-HM19.1A (UFMG-CM-Y352 = CBS 11463 = NRRL Y-48658) (da Cunha-Pereira et al 2011;Martiniano et al 2013;Hickert et al 2014;Cadete et al 2016), and none of the remaining three Brazilian strains of this species have been studied. Therefore, in the present study we report the ability of D-xylose fermentation by all Sp.…”

“…parashehatae UFMG-CM-Y507 and Sc. illinoinensis UFMG-CM-Y510 have previously been evaluated for their ability to ferment lignocellulosic hydrolysates (da Cunha-Pereira et al 2011;Ferreira et al 2011;Chandel et al 2013Chandel et al , 2014Martiniano et al 2013;Antunes et al 2014Antunes et al , 2016Hickert et al 2014;Duss an et al 2016). In brief, Sp.…”

“…arborariae UFMG-CM-Y352 showed an ethanol yield and productivity of 0Á45 g g À1 and 0Á16 g l À1 h À1 , respectively, in nonsupplemented, acid rice hull hydrolysate (da Cunha-Pereira et al 2011). Its ethanol yield and productivity were 0Á14 g g À1 and 0Á04 g l À1 h À1 , respectively, in detoxified, supplemented acid sugarcane bagasse hemicellulosic hydrolysate (Martiniano et al 2013), and a yield of 0Á38 g g À1 has been achieved in a nonsupplemented, acid-enzymatic soybean hull hydrolysate cultured with immobilized cells (Hickert et al 2014). Significant variation has been observed in the fermentation parameters in these studies, including the present study, as different culture conditions were employed for each work, although the same yeast strain was tested.…”

Isolamento e seleção de leveduras para fermentação de Xilose

“…Diante disso, o processo fermentativo em meio de xilose visando à produção de etanol pode ser favorecido se houver estudos minuciosos a fim de desvendar a necessidade específica de oxigenação exigida por cada espécie fermentadora para conversão no produto de interesse. (PEREIRA et al, 2011;CADETE et al, 2009;MARTINIANO et al, 2013;SILVA et al, 2011;LEE et al, 2000). Ainda foi realizado um último experimento utilizando as 5 melhores linhagens quanto à produção de etanol g L -1 (24h) em meio hidrolisado hemicelulósico de bagaço de cana-deaçúcar.…”