The potential of walnut shells for production of oligosaccharides by liquid hot water treatment

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dc.authoridBuyukkileci, Ali Oguz/0000-0002-0784-0008
dc.authorwosidBuyukkileci, Ali Oguz/T-6317-2018
dc.contributor.authorSurek, Ece
dc.contributor.authorSabanci, Kevser
dc.contributor.authorBuyukkileci, Ali Oguz
dc.date.accessioned2024-05-19T14:42:20Z
dc.date.available2024-05-19T14:42:20Z
dc.date.issued2023
dc.departmentİstinye Üniversitesien_US
dc.description.abstractWalnut shell (WS), which is discarded in a large amount, is usually utilized for heating purposes; therefore, obtaining fuctional products can add value to this waste biomass. In this study, xylan was determined as the dominant carbohydrate (18.6% of dry weight) in WS. The potential applicability of liquid hot water (LHW) treatment to WS was investigated in order to solubilize hemicellulose and hydrolyze it into oligomers such as xylooligosaccharide (XOS) as a prebiotic oligosaccharide and recover solid and liquid fractions, which can be raw materials for other value-added products. LHW was applied at different temperatures (170-210 degrees C) for various times (15-120 min), and their effect was combined calculating severity factor (log R-o = 3.39-4.74). The solubilization of biomass was increased (up to 60.9%) with severity. Under optimum conditions (log R-o of 3.95, 190 degrees C-15 min), 81.5% of xylan was hydrolyzed and recovered as mainly XOS (69.8% of xylan), and also xylose and arabinose. The total oligosaccharide (XOS, arabino, gluco- and galacto-oligosaccharides) and monosaccharide (mainly xylose) concentration were 14.3 and 2 g/L, respectively, and by-products did not exceed 1.6 g/L. Moreover, 2.5 mg GAE/mL of total phenolics were obtained at those conditions, whereas that was raised to 3.4 mg GAE/mL at harsher conditions. This study presented that LHW treatment was an eco-friendly alternative method for valorization of WS through production of a liquid with high value-added compounds such as oligosaccharides and solid rich in cellulose and lignin.en_US
dc.identifier.doi10.1007/s13399-023-04610-1
dc.identifier.issn2190-6815
dc.identifier.issn2190-6823
dc.identifier.scopus2-s2.0-85164703022en_US
dc.identifier.scopusqualityQ3en_US
dc.identifier.urihttps://doi.org10.1007/s13399-023-04610-1
dc.identifier.urihttps://hdl.handle.net/20.500.12713/5229
dc.identifier.wosWOS:001163759200001en_US
dc.identifier.wosqualityN/Aen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherSpringer Heidelbergen_US
dc.relation.ispartofBiomass Conversion and Biorefineryen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.snmz20240519_kaen_US
dc.subjectHemicelluloseen_US
dc.subjectLiquid Hot Wateren_US
dc.subjectOligosaccharideen_US
dc.subjectValorizationen_US
dc.subjectWalnut Shellen_US
dc.titleThe potential of walnut shells for production of oligosaccharides by liquid hot water treatmenten_US
dc.typeArticleen_US

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