Author, Institution: Odeta Pocienė, Kaunas University of Technology
Science area, field of science: Technological Sciences, Chemical Engineering, T005
Research Supervisor: Assoc. Prof. Dr. Rasa Šlinkšienė (Kaunas University of Technology, Technological Sciences, Chemical Engineering, T005)
Dissertation Defence Board of Chemical Engineering Science Field:
Prof. Dr. Raimundas Šiaučiūnas (Kaunas University of Technology, Technological Sciences, Chemical Engineering, T005) – chairperson
Prof. Dr. Daiva Leskauskaitė (Kaunas University of Technology, Technological Sciences, Chemical Engineering, T005)
Assoc. Prof. Dr. Jolanta Rousseau (Artois University, France, Technological Sciences, Chemical Engineering, T005)
Prof. Dr. Eglė Sendžikienė (Vytautas Magnus University, Technological Sciences, Environmental Engineering, T004)
Prof. Dr. Eugenijus Valatka (Kaunas University of Technology, Technological Sciences, Chemical Engineering, T005)
Dissertation defence meeting will be at Rectorate Hall of Kaunas University of Technology (K. Donelaičio 73 – 402, Kaunas)
The doctoral dissertation is available at the library of Kaunas University of Technology (Gedimino 50, Kaunas) and on the internet: O. Pocienė el. dissertation.pdf
© O. Pocienė, 2026 “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 demand for food and intensive agriculture encourage the use of mineral fertilisers, but their excess worsens the condition of the soil and increases environmental pollution. At the same time, large amounts of biodegradable waste are generated in the food industry and agriculture, which contain nutrients and organic carbon necessary for plants, but do not have high-quality processing technologies for high-added value products. This work examines the possibilities of using these wastes to create environmentally friendly compound solid organic fertilisers. The study comprehensively assessed the influence of the chemical composition and physical properties of buckwheat groats production waste and bone meal on the properties of solid organic fertilizers and substantiated the potential for their use as fertiliser raw materials. Raw material compositions were selected and the regularities of the wet granulation process were determined, assessing the influence of liquid binders and return on the shape and physical properties of the granules. Using the discrete element method, the parameters ensuring high-quality spreading of organic fertiliser granules in the soil by traditional mineral fertiliser spreaders were modelled, and their distribution uniformity was assessed. The possibility of obtaining organic carbon extracts from buckwheat groats production waste was also investigated. The results of the study provide the prerequisites for more efficient use of biodegradable waste in fertiliser production, contributing to the development of a circular economy and improving soil condition.