Author, Institution: Deimantė Čepauskienė, Lithuanian Energy Institute
Science area, field of science: Technological Sciences, Energetics and Power Engineering, T006
Scientific Supervisors: Dr. Nerijus Pedišius (Lithuanian Energy Institute, Technological Sciences, Energetics and Power Engineering, T006) (September 2016 – February 2024)
Dr. Marius Praspaliauskas (Lithuanian Energy Institute, Technological Sciences, Energetics and Power Engineering, T006) (From March 2024)
Dissertation Defence Board of Energetics and Power Engineering Science Field:
Dr. Sigitas Rimkevičius (Lithuanian Energy Institute, Technological Sciences, Energetics and Power Engineering, T006) – chairperson
Prof. Dr. Algirdas Jasinskas (Vytautas Magnus University, Technological Sciences, Environmental Engineering, T004)
Assoc. Prof. Dr. Vladimirs Kirsanovs (Riga Technical University, Latvia, Technological Sciences, Environmental Engineering, T004)
Assoc. Prof. Dr. Monika Maziukienė (Kaunas University of Technology, Technological Sciences, Energetics and Power Engineering, T006)
Prof. Dr. Hab. Gintautas Miliauskas (Kaunas University of Technology, Technological Sciences, Energetics and Power Engineering, T006)
Dissertation defence meeting will be at the conference room at Lithuanian Energy Institute (Breslaujos 3 – 202, Kaunas)
The doctoral dissertation and summary of the dissertation are available at the library of Kaunas University of Technology (Gedimino 50, Kaunas):
D. Čepauskienė el. dissertation.pdf
D. Čepauskienė el. summary.pdf
© D. Čepauskienė, 2025 “The text of the thesis may not be copied, distributed, published, made public, including by making it publicly available on computer networks (Internet), reproduced in any form or by any means, including, but not limited to, electronic, mechanical or other means. Pursuant to Article 25(1) of the Law on Copyright and Related Rights of the Republic of Lithuania, a person with a disability who has difficulties in reading a document of a thesis published on the Internet, and insofar as this is justified by a particular disability, shall request that the document be made available in an alternative form by e-mail to doktorantura@ktu.lt.”
Annotation: The growing challenges posed by climate change – including global warming, sea level rise, ecosystem alterations, and increasingly frequent extreme weather events – along with concerns regarding energy security, necessitate the search for alternatives to fossil fuel use. One such alternative is the use of local biofuel, which contributes to energy security, stimulates the regional economy, and allows for more efficient use of local renewable resources. The use of such fuel is considered a CO2-neutral process, as the plants from which biofuel is produced absorb as much CO2 during their growth cycle as is later released when burned. For this reason, increasing attention is being paid to the use of agricultural waste (straw, plant stems and leaves left after harvesting) and energy crops (explicitly grown for energy purposes) as agro-biomass in the energy sector. However, the use of agro-biofuel produced from such raw materials remains challenging due to their specific composition, which includes higher concentrations of alkali metals and chlorine. These result in low ash melting temperatures and cause ash slagging, boiler fouling, and corrosion processes. The application of phosphogypsum as a mineral fuel additive offers the potential to reduce the quantity of this waste. In the context of this study, a beneficial and CO₂-neutral method has been proposed to comprehensively address the issue of utilising two waste materials – agricultural waste and phosphogypsum – while creating a higher value-added energy product.
19th of December, 2025, 10:00
Conference room at Lithuanian Energy Institute (Breslaujos 3 – 202)
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