Sustainable technology of potassium dihydrogen phosphate production and liquid waste recovery

Friday, June 9, 2017 - 13:00
Dissertation Defence Hall (K. Donelaičio St. 73- 403 room)

Author, Institution: Kristina Jančaitienė, Kaunas University of Technology

Science Area, Field of Science: Technological Sciences, Chemical Engineering – 05T

Summary of the Doctoral Thesis: Summary

Scientific supervisor:
2013–2017 Assoc. Prof. Dr. Rasa ŠLINKŠIENĖ (Kaunas University of Technology, Technological Sciences, Chemical Engineering – 05T);
2010–2013 Prof. Dr. Habil. Alfredas Martynas SVIKLAS (Kaunas University of Technology, Technological Sciences, Chemical Engineering – 05T).

Dissertation Defence Board of Chemical Engineering Science Field:
Prof. Dr. Raimundas ŠIAUČIŪNAS (Kaunas University of Technology, Technological Sciences, Chemical Engineering – 05T) – chairman;
Prof. Dr. Sergiy ANTONYUK (Technical University of Kaiserslautern, Germany, Technological Sciences, Mechanical Engineering – 09T);
Prof. Dr. Kęstutis BALTAKYS (Kaunas University of Technology, Technological Sciences, Chemical Engineering – 05T);
Assoc. Prof. Dr. Eglė SENDŽIKIENĖ (Aleksandras Stulginskis University, Technological Sciences, Environmental Engineering – 04T);
Prof. Dr. Virgilijus VALEIKA (Kaunas University of Technology, Technological Sciences, Chemical Engineering – 05T).

The Doctoral Dissertation is available on the internet and at the library of Kaunas University of Technology (K. Donelaičio St. 20, Kaunas).

Annotation:
A highly concentrated fertilizer is potassium phosphates (potassium hydrogen phosphate and potassium dihydrogen phosphate) which, unfortunately, is usually prohibitively expensive due to excessive manufacturing costs. As a result of high prices, the commonly used potassium dihydrogen phosphate is usually restricted to highly chlorine-sensitive plants, i.e. flowers and vegetables grown in greenhouses. In the dissertation was performed studies about potassium dihydrogen phosphate production by using cheaper raw material and simpler production method. In this paper was suitable quality crystalline potassium dihydrogen phosphate received, by using potassium chloride and ammonium dihydrogen phosphate and by selecting the best conditions (the ratio of the starting materials, the reaction temperature and the time). Data on pure crystalline potassium dihydrogen phosphate and with cellulose additive granulation conditions are presented in this work. The remaining liquid phase after separating crystalline product was analyzed and evaluated, and is proposed to use as a basic solution to produce liquid fertilizers. In this way, it suggested the principal waste-free potassium dihydrogen phosphate production technology, which is very important for the implementation of modern effective use of natural resources and environmental trends and recommendations. Research results are very important and valuable as their basis for the production of composite bulk mineral (potassium dihydrogen phosphate) and liquid (4-5-15 brand) fertilizers.