Razvoj održivih procesa proizvodnje bioetanola

doctoral thesis

• Title (english): Development of sustainable processes for bioethanol production
• Author: Damir Oros
• Mentor: Predrag Horvat (mentor)
• Committee member: Božidar Šantek (predsjednik povjerenstva)
• Granter: University of Zagreb; Faculty of Food Technology and Biotechnology; Zagreb
• Defense date and country: 2013-06-27, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Biotechnology
• Universal decimal classification (UDC): 663 - Industrial microbiology. Industrial mycology. Zymurgy, fermentation industry. Beverage industry. Stimulant industry

Abstract

Cilj ovog doktorskog rada bio je usporediti ekstrakciju i istiskivanje plinom (eng. gas stripping) kao metode izdvajanja etanola iz fermentirane podloge. Posebno je istraženo toksično djelovanje ekstraktanata di(propilenglikol)butiletera, 1-tert-butoksipropan-2-ola, etil-oleata, oktan-1-ola i oleil alkohola na kulturu kvasca Saccharomyces cerevisiae te je raspravljena njihova moguća primjena u integriranom sustavu. Provedeno je istraživanje razdvajanja faza i stabilnosti emulzija za sustave podloga-ekstraktant. Najpogodniji plin za istiskivanje etanola izabran je temeljem rezultata istraživanja različitih plinova (zrak, dušik i ugljikov(IV) oksid) obzirom na brzinu izdvajanja etanola iz razrijeđenih vodenih otopina pri različitim prividnim srednjim linearnim brzinama strujanja plina. Istiskivanje etanola iz fermentirane podloge i iz organskog ekstrakta pomoću CO2 istraženo je pri atmosferskom tlaku i u uvjetima sniženog tlaka.

Abstract (english)

The aim of this investigation was the comparison of extraction and stripping as methods of ethanol separation from fermentation broth. The toxicity of octan-1-ol, 1-tert-butoxy-propan-2-ol, di(propylene glycol) butyl ether, ethyl oleate and oleyl alcohol on the culture of the yeast Saccharomyces cerevisiae was studied. The use of examined solvents in an integrated system was discussed. The phase separation and the emulsion stability for the broth-extracting solvent system were examined. The most convenient gas for the ethanol stripping was selected by examining of different gases (air, nitrogen and carbon(IV) oxide) concerning of ethanol stripping rate (from diluted aqueous solutions) and different superficial gas velocities. Gas stripping of ethanol by CO2 as a carrier from fermented broth and organic extracts was studied under atmospheric and low-pressure conditions.

• Keywords: bioetanol; ekstrakcija kapljevina-kapljevina; istiskivanje plinom; sniženi tlak; integrirani bioprocesni sustav; toksičnost organskih otapala; fermentirani rezanci šećerne repe
• Keywords (english): bioethanol; liquid-liquid extraction; stripping; reduced pressure; integrated bioprocess system; toxicity of organic solvents; fermented sugar beet cossettes.
• Language: croatian
• URN:NBN: urn:nbn:hr:159:368533
• Promotion: 2013-09-22
• Study programme: Title: Postgraduate PhD Study in Biotechnology and Bioprocess Engineering; Study programme type: university; Study level: postgraduate; Academic / professional title: doktor/doktorica znanosti (doktor/doktorica znanosti)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2018-05-17 10:38:42