SPRAY DRYING OF PHOSPHATE-SOLUBILIZING BACTERIA FOR THE PRODUCTION OF NEW BIOFERTILIZERS Original scientific paper

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Published: 27.08.2025
Updated: 27.08.2025
DOI: https://doi.org/10.2298/CICEQ241216017L
Keywords:
Azotobacter, Pseudomonas, Bacillus, encapsulation, soil

Main Article Content

Steva M. Lević
University of Belgrade, Faculty of Agriculture, Belgrade, Serbia
https://orcid.org/0000-0001-8337-3475
Jelena Jovičić-Petrović
University of Belgrade, Faculty of Agriculture, Belgrade, Serbia
https://orcid.org/0000-0002-6458-8312
Milica Mirković
University of Belgrade, Faculty of Agriculture, Belgrade, Serbia
https://orcid.org/0000-0002-0714-7078
Slavica Kerečki
University of Belgrade, Faculty of Agriculture, Belgrade, Serbia
https://orcid.org/0000-0002-4111-3015
Kata Trifković
Inlecom Commercial Pathways, Gateway Business Suites, Killarney, Ireland
https://orcid.org/0000-0002-1087-1374
Viktor Nedović
University of Belgrade, Faculty of Agriculture, Belgrade, Serbia
https://orcid.org/0000-0002-8943-0087
Vera Raičević
University of Belgrade, Faculty of Agriculture, Belgrade, Serbia
https://orcid.org/0000-0001-9046-2951

Abstract

Phosphate-solubilizing bacteria represent a sustainable solution to cope with phosphorus unavailability in agricultural soil. However, the success of their application is highly dependent on multiple environmental factors, and a novel approach is needed for bioformulations. The present study aimed to evaluate the suitability of the spray drying method for encapsulation of phosphate-solubilizing bacteria Azotobacter chroococcum F14/2, Bacillus megaterium 11/3, and Pseudomonas putida P1. Three strains were characterized, grown under optimal conditions, and encapsulated as a whole medium-cell system using the spray drying method and maltodextrin as carrier material. The described procedure provided encapsulates with an average particle size below 5 μm, moisture content under 10%, and satisfactory powder properties. The cell viability of encapsulates (after storage) was in the following order: Bacillus megaterium 11/3 > Azotobacter chroococcum F14/2 > Pseudomonas putida P1. Additional protection during spray drying was most probably achieved by the presence of microbial exopolysaccharides, which opened the possibilities for further optimization of encapsulation procedures.

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Vol. 32 No. 2 (2026)

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How to Cite

SPRAY DRYING OF PHOSPHATE-SOLUBILIZING BACTERIA FOR THE PRODUCTION OF NEW BIOFERTILIZERS : Original scientific paper. (2025). Chemical Industry & Chemical Engineering Quarterly, 32(2), 133-142. https://doi.org/10.2298/CICEQ241216017L

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