Analiza životnog ciklusa (LCA) procesa proizvodnje mliječne kiseline iz obnovljivih izvora

undergraduate thesis

• Title (english): Life cycle analysis (LCA) in production of lactic acid from renewable energy sources
• Author: Filip Grgić
• Mentor: Antonija Trontel (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: 2018-09-19, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Biotechnology

Abstract

U ovom radu izrađena je analiza životnog ciklusa LCA različitih procesa proizvodnje mliječne kiseline iz obnovljivih sirovina (pšenična slama, kukuruzovina) s pomoću homofermentativne bakterije mliječne kiseline L. amylovorus DSM 20531T. Za izradu analize korišteni su rezultati dobivenim tijekom istraživanja na projektu „Održiva proizvodnja bioetanola i biokemikalija iz otpadnih poljoprivrednih lignoceluloznih sirovina“ (HRZZ-9158), a za izračun korišten je računalni program SPIonExcell. Specifična parcijalna površina atot čija vrijednost predstavlja manji ili veći utjecaj na okoliš te ekonomsku i ekološku održivost korištena je za kvanititativni prikaz održivosti procesa. Izračunate parcijalna specifična površina za procese proizvodnje mliječne kiseline iz hidrolizata pšenične slame i hidrolizata kukuruzovine iznose atot=7411.04 m2/1 kg i 5354.35 m2/1 kg proizvedene mliječne kiseline. Kako niža vrijednost parcijalne specifične površine predstavlja veću održivost procesa s ekonomske i ekološke perspektive može se zaključiti da je kukuruzovina pogodnija sirovina za kiselinsku predobradu i za proizvodnju mliječne kiseline. Parcijalna specifična površina za proces simultane hidrolize predobrađene pšenične slame (dobivene alkalnom predobradom) i fermentacije do mliječne kiseline iznosi atot=6487,56m2/1 kg proizvedene mliječne kiseline. Usporedbom procesa proizvodnje mliječne kiseline iz pšenične slame kiselinskom i alkalnom predobradom može se zaključiti da proces alkalne predobade ima veću održivost od procesa kiselinske predobrade pšenične slame.

Abstract (english)

In this work, different lactic acid production processes from lignocellulosic raw material (wheat straw, corn stover) by homofermentative amylolytic lactic acid bacterium Lactobacillus amylovorus DSM 20531T were analyzed and compared by means of process sustainability. The results of the research on "Sustainable production of bioethanol and biochemicals from waste agricultural lignocellulosic raw materials" (HRZZ-9158) were used for the analysis and the process sustainability was determined using SPIonExcell computer program. The specific partial area atot whose value represents smaller or greater environmental impact, as well as economic and environmental sustainability, was used for quantization of process sustainability. The calculated partial specific area for lactic acid production processes from wheat straw hydrolyzate and corn stover hydrolyzate are atot = 7411.04 m2 / 1 kg and 5354.35 m2 / 1 kg of produced lactic acid. As the lower value of a partial specific surface represents a greater sustainability of the process from an economic and ecological perspective, it can be concluded that corn stover is more suitable for acid pretreatment and for the production of lactic acid. The partial specific surface for the simultaneous hydrolysis process of pretreated wheat straw (obtained by alkaline pretreatment) and fermentation to lactic acid is at = 6487.56m2 / 1 kg of produced lactic acid. By comparing the process of production of lactic acid from wheat straw by acidic and alkaline pre-treatment it can be concluded that the alkaline precipitation process has greater sustainability than the acid pre-processing of wheat straw.

• Keywords: ekološka održivost; LCA analiza; lignocelulozne sirovine; mliječna kiselina; SPI indeks
• Keywords (english): ecologic sustainability; LCA analysis; lignocellulose raw materials; lactic acid; SPI index
• Language: croatian
• URN:NBN: urn:nbn:hr:159:773133
• 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: 2019-04-03 13:16:28