Rast čiste kulture mikroalgi pri različitim uvjetima saliniteta i dužine svjetlosnog dana

master's thesis

• Title (english): Growth of pure culture of microalgae under different conditions of salinity and daylength
• Author: Monika Jurgec
• Mentor: Ana Gavrilović (mentor)
• Committee member: Ana Gavrilović (predsjednik povjerenstva)
• Committee member: Neven Voća (član povjerenstva)
• Committee member: Tea Tomljanović (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Fisheries, Beekeeping, Game Management and Special Zoology); Zagreb
• Defense date and country: 2024-09-30, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Mikroalge zbog brze reprodukcije i visokog sadržaja ulja ističu se kao sirovina budućnosti u
proizvodnji biogoriva. Donedavno su predstavljale ključne čimbenike u mrjestilištima riba i
školjkaša, ali u posljednjih dvadeset godine sve su značajnija sirovina u prehrambenoj i
farmaceutskoj industriji te industriji biogoriva. Na rast mikroalgi utječu brojni čimbenici
kvalitete uzgojne sredine. Razumijevanje tih čimbenika od ključne je važnosti za optimizaciju
njihovog uzgoja i održivu proizvodnju. U ovom je radu istraživan utjecaj saliniteta i dužine
svjetlosnog dana na brzinu rasta čiste kulture mikroalge Isochrysis galbana. Pokus je proveden
u dva ponavljanja te u dvije faze. U prvoj fazi je ispitan utjecaj različiti saliniteta (15, 25 i 35
ppt) dok su ostali uvjeti uzgoja bili konstantni. U drugoj je fazi ispitan utjecaj različitih duljina
svjetlosnog dana (16, 18 i 24 sata). Rezultati su za obje faze uspoređeni ANOVA testom.
Najbolji rast postignut je pri salinitetu od 25 ppt te pri konstantnom osvjetljenju, odnosno
duljini svjetlosnog dana od 24 sata.

Abstract (english)

Microalgae, due to their rapid reproduction and high oil content, stand out as a future raw
material in the production of biofuels. Until recently, they played a key role in fish and shellfish
hatcheries, but in the last two decades, they have become increasingly important as a raw
material in the food, pharmaceutical, and biofuel industries. The growth of microalgae is
influenced by various factors in the cultivation environment. Understanding these factors is
of crucial importance for optimizing their cultivation and ensuring sustainable production. This
study investigates the impact of salinity and photoperiod on the growth rate of a pure culture
of the microalgae Isochrysis galbana. The experiment was conducted in duplication and in two
phases. The first phase examined the influence of different salinities (15, 25, and 35 ppt) while
keeping other cultivation conditions constant. In the second phase, the impact of different
photoperiods (16, 18, and 24 hours) was investigated. The results for both phases were
compared using ANOVA testing. The best growth was achieved at a salinity of 25 ppt and under
constant illumination, corresponding to a photoperiod of 24 hours.

• Keywords: mikroalge; salinitet; svjetlosni dan; brzina rasta; biodizel
• Keywords (english): microalgae; salinity; photoperiod; growth rate; biodiesel
• Language: croatian
• URN:NBN: urn:nbn:hr:204:493178
• 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: 2024-11-04 07:35:06