Predobrada kukuruzovine za proizvodnju bioetanola

undergraduate thesis

• Title (english): Pretreatment of corn stover for bioethanol production
• Author: Anja Lauder
• Mentor: Božidar Šantek (mentor)
• Granter: University 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 country: 2016-09-20, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Biotechnology

Abstract

Cilj ovog rada bio je provesti predobradu kukuruzovine u visokotlačnom reaktoru za termičku predobradu lignoceluloznih sirovina pri različitim uvjetima procesa (vremena zadržavanja i koncentracije H2SO4) te pri konstantnoj temperaturi od 210°C i tlaku pare od 20 bara. Analizom dobivenih hidrolizata trebalo je zaključiti pri kojim se procesnim uvjetima postižu najbolji rezultati. Nakon predobrade sirovine dobivene su čvrsta i tekuća faza, svaka je faza analizirana zasebno i u svakoj fazi... More identificirani su različiti ugljikohidrati i nusprodukti te su određene njihove koncentracije pomoću kromatografije visoke djelotvornosti. Korištenjem 1,0 %-tne H2SO4, pri vremenu zadržavanja od 5 minuta dobiveni su najveći udjeli fermentabilnih šećera, 4,1 % glukana, 5,9 % ksilana i 1,2 % arabinana, no dobiveni su relativno veliki udjeli toksičnih nusprodukata: 5,4 % mravlje, 2,7 % octene i 8,4 % levulinske kiseline. U daljnjem istraživanju korištena je koncentracija kiseline od 0,5 % pri čemu su rezultati pokazali najveću konverziju komponenti kukuruzovine u fermentabilne šećere, dobiveno je 4,8 % glukana, 4,7 % ksilana i 1,5 % arabinana. Pri ovim uvjetima smanjen je i udio toksičnih tvari na svega 3,5 % mravlje, 1,9 % octene i 0,6 % levulinske kiseline. Less

Abstract (english)

The goal of this research was to examine pretreatment of corn stover in high-pressure reactor for thermic pretreatment of lignocellulose raw materials under different conditions (retention time and concentration of H2SO4) and constant temperature of 210°C and pressure of 20 bars. Results of pretreatment were liquid and solid phase, each phase was then individually analyzed and in each phase different carbohydrates and by-products were identified together with their concentration. Using... More 1 % sulphuric acid the highest content of fermentable sugars was obtained with 5 min retention time, 4,1 % glucan, 5,9 % xylan and 1,2 % arabinan,but the amount of toxic compounds was relatively high: 5,4 % formic, 2,7 % acetic and 8,4 % levulinic acid. In further research, 0,5 % H2SO4 was used and then the results showed even higher gain of fermentable sugars, 4,8 % glucan, 4,7 % xylan and 1,54 %. Under this conditions the amount of toxic compounds was reduced to 3,5 % formic, 1,9 % acetic and 0,6 % levulinic acid. Less

• Keywords: lignocelulozna sirovina; predobrada; tretman parom; kukuruzovina
• Keywords (english): lignocellulosic raw material; corn stover; pretreatment; steam treatment
• Language: croatian
• URN:NBN: urn:nbn:hr:159:617513
• Study programme: Title: 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 resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2017-04-24 11:16:10