Abstract
This chapter presents some recent research results on pretreatment of pine sawdust for bio-ethanol production, using organosolv extraction-based methods, combined with other methods including ultrasonic treatment, and sodium hydroxide treatment, and enzymatic hydrolysis of the pretreated pine sawdust samples. The pretreatment efficiency (PE) and delignification efficiency (DE) of various pretreatment methods were studied. All the pretreatment methods, in particular the organosolv extraction, resulted in significant removal of lignin and hemicellulose. The results indicated that the combination of three pretreatment methods (organosolv extraction + ultrasound + NaOH) achieved the best PE (61.6 % ± 1 %) and DE (86.4 % ± 3 %). Enzymatic hydrolysis of pine samples treated with different pretreatment methods was comparatively studied. Glucose yields, total sugar yields, and total weight loss were obtained under various enzyme loading (0~15.6 FPU cellulase) and reaction time (48 h). The maximum glucose yield and the maximum total sugar yield were 5.8 % and 7.1 %, respectively, for un-pretreated raw pine samples, compared with 19.3 % and 22.40 % for the (organosolv extracted + ultrasound + NaOH) treated samples.
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Acknowledgments
The authors are grateful for the financial support from the Ontario Ministry of Energy and Ontario Centers of Excellence (OCE) through the Atikokan Bioenergy Research Center (ABRC) program. The authors would also like to acknowledge Natural Sciences and Engineering Research Council of Canada (NSERC) for the Discovery Grants.
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Xu, C., Liao, B., Shi, W. (2013). Organosolv Pretreatment of Pine Sawdust for Bio-ethanol Production. In: Fang, Z. (eds) Pretreatment Techniques for Biofuels and Biorefineries. Green Energy and Technology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-32735-3_19
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DOI: https://doi.org/10.1007/978-3-642-32735-3_19
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