Waste Bread as a Biomass Source: Optimization of Enzymatic Hydrolysis and Relation between Rheological Behavior and Glucose Yield

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dc.authorid0000-0002-7743-0872
dc.authorid0000-0001-8850-1819
dc.authorscopusid23979419500
dc.authorscopusid54411196400
dc.authorscopusid6602223026
dc.authorscopusid57203522005
dc.authorwosidDemirci, Ahmet Şükrü/AAT-6596-2020
dc.authorwosidGumus, Tuncay/ABA-4238-2020
dc.authorwosidpalabiyik, ibrahim/V-3781-2017
dc.authorwosidyu, wilson/AAC-8459-2021
dc.contributor.authorDemirci, Ahmet Şükrü
dc.contributor.authorPalabıyık, İbrahim
dc.contributor.authorGümüş, Tuncay
dc.contributor.authorÖzalp, Seymanur
dc.date.accessioned2022-05-11T14:44:56Z
dc.date.available2022-05-11T14:44:56Z
dc.date.issued2017
dc.departmentFakülteler, Ziraat Fakültesi, Gıda Mühendisliği Bölümü
dc.description.abstractAmongst the many forms of food waste, bread is a major contributor to the problem. Two aims of this research investigate waste breads potential of being a bioresource for the production of fermentable sugars which are precursor of valuable bioproducts by fermentation process: finding optimum substrate, water and enzyme ratio to produce the highest amount of fermentable sugars and investigating the rheological behavior of the system during hydrolysis. Two stage waste bread hydrolysis was performed with enzymes alpha-amylase and amyloglucosiades and response surface methodology was used to optimize substrate, water and enzyme ratio. Discovery Hybrid Rheometer-2 (TA Instruments) fitted with a parallel-plate geometry was used to investigate steady flow viscosity of the slurry during hydrolysis. 99 % of theoretical maximum glucose yield, a main fermentable sugar, is achieved by optimizing enzymatic hydrolysis conditions of waste bread at liquefaction and saccharification stages. Just after the addition of alpha-amylase enzyme, substantial decrease is observed in viscosity and Casson apparent yield stress of the slurry. During saccharification stage, glucose yield increases dramatically while viscosity of the slurries is very low and does not change considerably. The results imply that utilizing high concentrations of waste bread as a feedstock to produce fermentation products offers economic benefits without causing high power consumption, excessive wear on equipment, and reduced conversion which are generally expected consequences for high-solid processing.
dc.description.sponsorshipThe Scientific and Technological Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [114O429]
dc.description.sponsorshipThis research was supported with a Grant (TOVAG Project Number: 114O429) from The Scientific and Technological Research Council of Turkey (TUBITAK).
dc.identifier.doi10.1007/s12649-016-9601-6
dc.identifier.endpage782
dc.identifier.issn1877-2641
dc.identifier.issn1877-265X
dc.identifier.issue3en_US
dc.identifier.scopus2-s2.0-85001874259
dc.identifier.scopusqualityQ2
dc.identifier.startpage775
dc.identifier.urihttps://doi.org/10.1007/s12649-016-9601-6
dc.identifier.urihttps://hdl.handle.net/20.500.11776/9842
dc.identifier.volume8
dc.identifier.wosWOS:000398594100020
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorDemirci, Ahmet Şükrü
dc.institutionauthorPalabıyık, İbrahim
dc.institutionauthorGümüş, Tuncay
dc.institutionauthorÖzalp, Seymanur
dc.language.isoen
dc.publisherSpringer
dc.relation.ispartofWaste and Biomass Valorization
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectFree feedstock
dc.subjectGlucose yield
dc.subjectEnzyme
dc.subjectViscosity
dc.subjectBioethanol Production
dc.subjectLignocellulosic Materials
dc.subjectEthanol-Production
dc.subjectAlpha-Amylase
dc.subjectStarch
dc.subjectSaccharification
dc.subjectFermentation
dc.subjectGlucoamylase
dc.subjectPretreatment
dc.titleWaste Bread as a Biomass Source: Optimization of Enzymatic Hydrolysis and Relation between Rheological Behavior and Glucose Yield
dc.typeArticle

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