Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/12660
Title: Improvement of fermentable sugar extraction from hazelnut shells through microwave assisted dilute acid pretreatment
Authors: Uzuner, Sibel
Keywords: Fermentable sugar
Severity factor
Microwave pretreatment
Valorization
Publisher: North Carolina State University
Abstract: The most effective method for producing fermentable sugars (FSs) from biomass is thermochemical pretreatment assisted by enzymatic hydrolysis. However, the enzymatic hydrolysis-assisted thermochemical pretreatment method is limited by the formation of fermentation inhibitors, and it is time-consuming. There is growing interest in using a microwave (MW) pretreatment due to its uniform and rapid heating. This study aimed to determine, perform data-driven modeling, and optimize the effect of MW combined with dilute acid pretreatment (MW-DA) on the production of FSs from hazelnut shells. An artificial neural networks (ANNs) model based on Box-Behnken Design (BBD) was the best model described for fermentable sugar extraction (FSE). Optimization via BBD-based ANNs model was carried out for an acid concentration of 0.5 to 2% (w/w), a pretreatment time of 5 to 25 min, a pressure of 5 to 15 bar, and a temperature of 120 to 160 °C. The optimized FSE was estimated at 374 mg/g (81.4% conversion efficiency), with a severity factor of 3.61 under 1.58% H2SO4 for 13 min at 160 °C and 8.5 bar. Using the MW-DA pretreatment process lowered the costs significantly due to the decreases in acid concentration and pretreatment time.
Description: The author would like to thank Specialist Elif Ozturk at the Yildiz Technical University Science and Technology Application and Research Center, Istanbul, for assistance with microwave pretreatment analyses.
URI: https://doi.org/10.15376/biores.18.1.613-628
https://hdl.handle.net/11147/12660
Appears in Collections:Food Engineering / Gıda Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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