Παραγωγή βιοαιθανόλης από διατροφικά απορρίμματα

Παππάς, Αθανάσιος; Pappas, Athanasios

dc.contributor.author	Παππάς, Αθανάσιος	el
dc.contributor.author	Pappas, Athanasios	en
dc.date.accessioned	2018-02-27T09:27:15Z
dc.date.available	2018-02-27T09:27:15Z
dc.date.issued	2018-02-27
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/46577
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.15131
dc.rights	Default License
dc.subject	Βιοαιθανόλη	el
dc.subject	Βιοκαύσιμα	el
dc.subject	Διατροφικά απορρίμματα	el
dc.subject	Βιοδιεργασία	el
dc.subject	BioNSSF	en
dc.subject	Bioethanol	en
dc.subject	Biofuels	en
dc.title	Παραγωγή βιοαιθανόλης από διατροφικά απορρίμματα	el
heal.type	bachelorThesis
heal.classification	Βιοτεχνολογία	el
heal.language	el
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	2017-10-11
heal.abstract	Μελέτης της επίδρασης προκατεργασίας θερμού νερού σε διατροφικά απορρίμματα καθώς και του ενζυμικού φορτίου στην τελική παραγωγή βιοαιθανόλης μέσω εφαρμογής της μεθόδου NSSF	el
heal.abstract	The excessive use of fossil fuels makes it imperative to seek for alternative sources of energy and fuels. The production of biofuels forms a reliable solution for the confortation of the problem. Considering that the conventional raw materials used for the production of biofuels are also a food source and their cultivation requires extended land areas, the interest for biofuels production turns to the exploitation of biowastes such as food wastes. In the present thesis, we have studied the produ ction of bioethanol from food wastes and in particular the effect of the pretreatment in the process. Initially, we examined the effect of enzyme loading (Cellic ® CTec2) during enzymatic hydrolysis of food - waste as well as in bioethanol production. Food w aste samples were pretreated with liquid hot water in the presence of H 2 SO 4 (100 o C , 3 h , 3 % (w/w) concentration of H 2 SO 4 ) and hydrolysed at enzyme loading of 10,20,40 and 60 FPU/ g dry FW. The results indicated that hydrolysis is favored at high enzyme loadings. Maximum glucose concentration 55.67 g/L and maximum reducing sugars concentration 98 g/L were achieved using 60 FPU/ g dry FW . Then, a non isothermal simultaneous saccharification and fermentation (NSSF) process operating in batch mode was appl ied. Samples were pretreated with liquid hot water at two different conditions, a mild one (t=1 h, Τ =80 o C, C H2SO4 =1%, w/w) and an extreme one (t=3 h, Τ =100 o C, C H2SO4 =3%, w/w). The pretreated material was prehydrolyzed using initially a commercial glucoamylase preparation (Spirizyme 60 U/g starch FW, Τ =65 ο C, 30 min) followed by the addition of Cellic ® CTec2 at enzyme loading of 5, 10, 20, 40, 60 FPU/g cellulose FW for 6 h at 50 o C. The maximum ethanol production was achieved via the mild pretreatment for the loading of 60 FPU/g cellulose FW and found equal to 24.89 g/L . Despite that, and taking under consideration the production cost, 40 FPU was considered as the opt imum loading for the process. Finally, we examined the combined effect of temperature, duration of pretreatment and concentration of H 2 SO 4 solution in the yield of the process. A Box - Benkhen experimental design with 3 independent values and 13 different combinations of temperature, duration and concentration , was applied . A batch nonisothermal simultaneous saccharification and fermentation (NSSF) process was applied as described above . M aximum ethanol concentration 29.96 g/L was achieved when FW was pretr eated at 90 o C, 1 h and 1% H 2 SO 4 concentration, which is equivalent to a yield of 83.06 % of theoretical. During that particular process, starch was removed at a percentage of 90.34 % and cellulose at 58.4 % , which was the highest percentage achieved	en
heal.advisorName	Κέκος, Δημήτριος	el
heal.committeeMemberName	Λυμπεράτος, Γεράσιμος	el
heal.committeeMemberName	Παπαγιαννάκος, Νικόλαος	el
heal.committeeMemberID	Παπαγιαννάκος, Νικόλαος	el
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Χημικών Μηχανικών. Τομέας Σύνθεσης και Ανάπτυξης Βιομηχανικών Διαδικασιών (IV). Εργαστήριο Βιοτεχνολογίας	el
heal.academicPublisherID	ntua
heal.numberOfPages	105 σ.
heal.fullTextAvailability	true