prikaz prve stranice dokumenta Predobrada jelove piljevine razrijeđenom sumpornom kiselinom u visokotlačnom reaktoru
  Download
PDF 2.87 MB
undergraduate thesis
Predobrada jelove piljevine razrijeđenom sumpornom kiselinom u visokotlačnom reaktoru
Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology, 2019. urn:nbn:hr:159:938001
Kelemen, Zora
University of Zagreb
Faculty of Food Technology and Biotechnology
Department of Biochemical Engineering
Laboratory for Biochemical Engineering, Industrial Microbiology and Malting and Brewing Technology

Institutional repository: Repository of the Faculty of Food Technology and Biotechnology

Cite this document

Kelemen, Z. (2019). Predobrada jelove piljevine razrijeđenom sumpornom kiselinom u visokotlačnom reaktoru (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:159:938001

Kelemen, Zora. "Predobrada jelove piljevine razrijeđenom sumpornom kiselinom u visokotlačnom reaktoru." Undergraduate thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, 2019. https://urn.nsk.hr/urn:nbn:hr:159:938001

Kelemen, Zora. "Predobrada jelove piljevine razrijeđenom sumpornom kiselinom u visokotlačnom reaktoru." Undergraduate thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, 2019. https://urn.nsk.hr/urn:nbn:hr:159:938001

Kelemen, Z. (2019). 'Predobrada jelove piljevine razrijeđenom sumpornom kiselinom u visokotlačnom reaktoru', Undergraduate thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, accessed 21 December 2024, https://urn.nsk.hr/urn:nbn:hr:159:938001

Kelemen Z. Predobrada jelove piljevine razrijeđenom sumpornom kiselinom u visokotlačnom reaktoru [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Food Technology and Biotechnology; 2019 [cited 2024 December 21] Available at: https://urn.nsk.hr/urn:nbn:hr:159:938001

Z. Kelemen, "Predobrada jelove piljevine razrijeđenom sumpornom kiselinom u visokotlačnom reaktoru", Undergraduate thesis, University of Zagreb, Faculty of Food Technology and Biotechnology, Zagreb, 2019. Available at: https://urn.nsk.hr/urn:nbn:hr:159:938001

Metadata
TitlePredobrada jelove piljevine razrijeđenom sumpornom kiselinom u visokotlačnom reaktoru
Title (english)Dilute acid pretreatment of fir sawdust in a high-pressure reactor
AuthorZora Kelemen
MentorVlatka Petravić Tominac (mentor)
GranterUniversity of Zagreb
Faculty of Food Technology and Biotechnology
(Department of Biochemical Engineering)
(Laboratory for Biochemical Engineering, Industrial Microbiology and Malting and Brewing Technology)
Zagreb
Defense date and country2019-09-18, Croatia
Scientific / art field,
discipline and subdiscipline		BIOTECHNICAL SCIENCES
Biotechnology
Abstract
Kao lignocelulozna sirovina u ovom radu je korištena jelova piljevina te je tretirana razrijeđenom sumpornom kiselinom (0.5% w/v) u visokotlačnom reaktoru pri različitim temperaturama (180°C, 200°C i 210°C) i vremenima zadržavanja (5, 10 i 15 minuta). Prikladnost pojedinih uvjeta predobrade procijenjena je obzirom na koncentracije šećera i inhibitora u dobivenim kiselinskim hidrolizatima. Najbolji sastav imao je hidrolizat dobiven pri temperaturi od 180°C uz vrijeme zadržavanja 5 minuta. Pritom je sastav hidrolizata bio slijedeći: glukoza (2.08g/L), manoza s primjesama ksiloze i galaktoze (7.17g/L), arabinoza (0.68g/L), topljivi lignin (0.20g/L), octena kiselina (6.86g/L), levulinska kiselina (0.03g/L) i furani (0.24g/L) dok mravlja kiselina nije detektirana. U svim primijenjenim uvjetima predobrade došlo je do razgradnje celuloze i jedini polisaharid detektiran u čvrstoj fazi bio je glukan. Kako bi se izbjegla prekomjerna razgradnja celuloze i nastajanje inhibitora, potrebno je provesti optimiranje predobrade primjenom blažih uvjeta hidrolize.
Abstract (english)
In this theisis, fir sawdust was hydrolysed using dilute sulphuric acid (0.5%w/v) pretreatment in a high-pressure reactor at three different temperatures (180°C, 200°C i 210°C) and three residence times (5, 10 i 15 minutes). Adequacy of conditions was approximated with regards to sugar and inhibitor concentrations in the hydrolysates. The best results were recovered during a 5 minute pretreatment at 180°C. The composition of the obtained hydrolysates was as following: glucose (2.08g/L), manose with xylose and galactose admixture (7.17g/L), arabinose (0.68g/L), soluble lignin (0.20g/L), acetic acid (6.86g/L), levulinic acid (0.03g/L), furans (0.24g/L) while formic acid was undetected. In all pretreatment conditions cellulose was hydrolysed and the only polisaccharide detected in solid phase was glucan. To avoid redundant disintegration of cellulose and forming of inhibitors, the pretreatment should be optimized by applying milder conditions of hydrolysis.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:159:938001
Study programmeTitle: Biotechnology
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka biotehnologije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka biotehnologije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2019-09-23 11:42:52