Proizvodnja bioplina iz sirutke prije i nakon proizvodnje skute

master's thesis

• Title (english): Biogas production of cheese whey before and after curd production
• Author: Marija Čorba
• Mentor: Vanja Jurišić (mentor)
• Committee member: Vanja Jurišić (predsjednik povjerenstva)
• Committee member: Milna Tudor Kalit (član povjerenstva)
• Committee member: Ana Matin (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Sustainable Technologies and Renewable Energy Sources); Zagreb
• Defense date and country: 2024-09-30, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Glavni nusproizvod u proizvodnji sira jest sirutka koja sadrži velike koncentracije organske
tvari. Odlaganjem sirutke u okoliš povećava se opasnost pojave eutrofikacije. S obzirom da
danas težimo smanjenju odlaganja i zbrinjavanja otpada, jedan od načina upravljanja otpadom
je iskorištenje nusproizvoda s ciljem dobivanja novih proizvoda s dodanom vrijednošću. Zbog
svojeg sastava koji je bogat organskim komponentama, sirutka se može koristiti u proizvodnji
bioplina. Bioplin je energent koji se danas u RH koristi za proizvodnju električne i toplinske
energije u kogeneracijskim sustavima, a dugoročno može pozitivno utjecati na ugljični otisak
različitih lanaca vrijednosti. U ovom radu radila se usporedba prinosa bioplina i metana iz šest
uzoraka sirutke dobivene prije i poslije proizvodnje skute. Također, prikazane su
međuzavisnosti pojedinog uzorka o parametrima kao što su udio suhe tvari, udio vode, te udio
makro i mikro elemenata koji utječu na kvalitetu sirovine, te ovisnost prinosa bioplina i
kemijske potrošnje kisika.

Abstract (english)

The main by-product in cheese production is whey, which contains high concentrations of
organic matter. Disposing of whey in the environment increases the risk of eutrophication.
Since we are striving today to reduce waste disposal and management, one way to manage
waste is to utilize by-products with the aim of creating new products with added value. Due
to its composition, which is rich in organic components, whey can be used in biogas
production. Biogas is an energy source that is currently used in Croatia for the production of
electricity and heat in cogeneration systems, and in the long term, it can positively impact the
carbon footprint of various value chains. This study compared the yield of biogas and methane
from six whey samples obtained before and after the production of ricotta. Additionally, the
interdependencies of individual samples with parameters such as dry matter content, water
content, and the content of macro and microelements affecting the quality of the raw material
were presented, as well as the dependence of biogas yield on chemical oxygen demand.

• Keywords: sirutka; bioplin; metan; anaerobna digestija
• Keywords (english): whey; biogas; methane; anaerobic digestion
• Language: croatian
• URN:NBN: urn:nbn:hr:204:839037
• Study programme: Title: Renewable energy sources in agriculture; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra obnovljivih izvora energije u poljoprivredi (magistar/magistra obnovljivih izvora energije u poljoprivredi)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2024-10-31 09:54:33