NDLI: Bioconversion of Alkali Pretreated Hazelnut Shells to Fermentable Sugars for Generation of High Value Products

Content Provider	Springer Nature Link
Author	Uzuner, Sibel Sharma Shivappa, Ratna Rani Cekmecelioglu, Deniz
Copyright Year	2016
Abstract	Hazelnut shells are lignocellulosic by-products of hazelnut processing. As the shells are rich in cellulose and hemicellulose, they have high potential as a raw material for production of food enzymes, biofuel, and various chemicals (acetic acid, furfural and lignin degradation products) after bioprocessing. The objective of this study was to determine the effect of alkali pretreatment and enzymatic hydrolysis on production of fermentable sugars from hazelnut shells. The hazelnut shells were pretreated with sodium hydroxide (NaOH) at concentrations of 3–7 % (w/v) for 30–90 min at 121 $^{°}$C. Pretreatments were evaluated measuring delignification, solid recovery and production of reducing sugars after enzymatic hydrolysis of the pretreated biomass. Up to 20 % lignin removal was achieved and the highest reducing sugar yield of 318.3 mg/g pretreated biomass (or 91.7 % enzyme conversion efficiency) was obtained from biomass pretreated with 3 % NaOH at a solid to liquid ratio of 1:20 for 60 min. The response surface model predicted the optimal reducing sugar production (357.2 mg/g pretreated biomass) under 3 % NaOH, 1:13 of solid to liquid ratio and 63 min of pretreatment period at 121 °C. Overall, the results of this study show a promise for hazelnut shells to be used in production of value-added products.
Starting Page	407
Ending Page	416
Page Count	10
File Format	PDF
ISSN	18772641
Journal	Waste and Biomass Valorization
Volume Number	8
Issue Number	2
e-ISSN	1877265X
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-06-08
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Delignification Hazelnut shells Reducing sugar Response surface methodology Alkali pretreatment Engineering Environment Renewable and Green Energy Industrial Pollution Prevention Waste Management/Waste Technology Environmental Engineering/Biotechnology
Content Type	Text
Resource Type	Article
Subject	Waste Management and Disposal Environmental Engineering Renewable Energy, Sustainability and the Environment

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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