TY - JOUR
T1 - Statistical optimization of dilute acid pretreatment of lignocellulosic biomass by response surface methodology to obtain fermentable sugars for bioethanol production
AU - Yildirim, Oznur
AU - Ozkaya, Bestami
AU - Altinbas, Mahmut
AU - Demir, Ahmet
N1 - Publisher Copyright:
© 2021 John Wiley & Sons Ltd
PY - 2021/5
Y1 - 2021/5
N2 - Central composite design to optimize sugar recovery from cotton straw and sunflower straw using dilute acid pretreatment was applied. Selected input variables were acid concentration, retention time, and temperature, as well as the response parameter of sugar yield. The optimum pretreatment conditions observed for maximum sugar yield are temperature: 121.7°C, acid concentration: 2.28% (vol/vol), and time: 36.82 minutes for cotton straw; temperature: 87.03°C, and acid concentration: 3.68% (vol/vol), and time: 36.82 minutes for sunflower straw. Maximum sugar concentrations were corresponded to 20 and 17.5 g L−1 under conditions for sunflower and cotton straw, respectively. This study not only investigates the sugar recovery efficiency statistically but also examines the ethanol production efficiency. As a result, the maximum ethanol concentration, ethanol yield, and ethanol productivity of 7.21 g L−1, 0.41 g g−1, and 0.10 g L−1 h−1 for cotton straw and 8.05 g L−1, 0.40 g g−1, and 0.11 g L−1 h−1 for sunflower straw were achieved via fermentation with Saccharomyces cerevisiae, respectively. The output of this study is important for the commercialization of bioprocesses that enable the conversion of the lignocellulosic waste matrix into high value-added products in a biorefinery concept.
AB - Central composite design to optimize sugar recovery from cotton straw and sunflower straw using dilute acid pretreatment was applied. Selected input variables were acid concentration, retention time, and temperature, as well as the response parameter of sugar yield. The optimum pretreatment conditions observed for maximum sugar yield are temperature: 121.7°C, acid concentration: 2.28% (vol/vol), and time: 36.82 minutes for cotton straw; temperature: 87.03°C, and acid concentration: 3.68% (vol/vol), and time: 36.82 minutes for sunflower straw. Maximum sugar concentrations were corresponded to 20 and 17.5 g L−1 under conditions for sunflower and cotton straw, respectively. This study not only investigates the sugar recovery efficiency statistically but also examines the ethanol production efficiency. As a result, the maximum ethanol concentration, ethanol yield, and ethanol productivity of 7.21 g L−1, 0.41 g g−1, and 0.10 g L−1 h−1 for cotton straw and 8.05 g L−1, 0.40 g g−1, and 0.11 g L−1 h−1 for sunflower straw were achieved via fermentation with Saccharomyces cerevisiae, respectively. The output of this study is important for the commercialization of bioprocesses that enable the conversion of the lignocellulosic waste matrix into high value-added products in a biorefinery concept.
KW - bioethanol
KW - fermentation
KW - lignocellulose
KW - pretreatment
KW - response surface methodology
KW - sugar recovery
UR - http://www.scopus.com/inward/record.url?scp=85099375215&partnerID=8YFLogxK
U2 - 10.1002/er.6423
DO - 10.1002/er.6423
M3 - Article
AN - SCOPUS:85099375215
SN - 0363-907X
VL - 45
SP - 8882
EP - 8899
JO - International Journal of Energy Research
JF - International Journal of Energy Research
IS - 6
ER -