“Clean technologies for sustainable environment – waters, waste, energy for circular economy“ (Clean&Circle) for creation and development of a Centre of Competence

Team - Institute of Microbiology "Stefan Angelov" - Bulgarian Academy of Sciences


Prof. Hristo Najdenski, DVM, DSc

Lead researcher

Pathogenic bacteria; Food-borne zoonoses; Factors and mechanisms of bacterial virulence; Bacterial-host relationships; Medical and veterinary microbiology; Infectious immunology; Molecular biology, ecology of pathogenic bacteria; New antibacterial agents; Antimicrobial resistance


Assoc. prof. Zlatka Alexieva, PhD

- Microbiology: Microbial genetics - bacteria, yeast and molds.
- Biochemistry: Biodegradation of aromatic and aliphatic toxic compounds. Microbial metabolism and regulation.
- Molecular biology: Gene cloning. Regulation of gene expression.


Assoc. prof. Vesselin Kussovski, PhD

Infectious microbiology, Food-borne zoonoses Antimicrobial agents, Antimicrobial resistance, Photodynamic inactivation of pathogenic microorganisms.


Assistant prof. Maya Zaharieva, PhD

Molecular and biological identification for food pathogens; Antimicrobial resistance; Antimicrobial activity and cytotoxicity of compounds of natural and synthetic origin; Infections and neoplasia; Bacterial-host relationships.


Assistant prof. Maria Gerginova, PhD

- Molecular genetic studies of bacteria, yeast and molds: species identification by PCR and DNA sequencing and phylogenetic analysis; - Investigation of the process of degradation of aromatic pollutants of soil and water of industrial origin: kinetics of growth and degradation, analysis of degradation products, enzymatic analyzes and laboratory evaluation of technologically significant microbial strains.


Assistant prof. Zvezdimira Tsvetanova, PhD

Water Microbiology: - biofilms in industrial water systems; - bacterial interactions in biofilm community; - ecology of pathogenic bacteria; - antimicrobial resistance of the microbiome in natural waters and waters under anthropogenic impact. Water supply and sanitation: - microbiological quality of drinking water; - biofilms in drinking water supply systems; - influence of materials in contact with drinking water on overall microbial growth; - water treatment. Environmental microbiology Industrial microbiology


Assistant prof. Diliana Simeonova, PhD

- Bacterial genetics and genomics - Bacterial physiology, biochemistry, enzymology - Biogeochemical transformations of Arsenic and Phosphorus - Bacterial energetic metabolisms - Management of Scientific Projects


Assistant prof. Nadejda Peneva

- Morphological and physiological analyzes of micro-organisms - bacteria, yeasts and molds; - Investigation of the process of degradation of aromatic pollutants of soil and water of industrial origin


Assistant prof. Lyudmila Dimitrova, PhD

–Pathogenic bacteria –Food-borne zoonoses -New antibacterial and antifungal agents with plant and animal origins -Mechanisms of bacterial virulence, incl. quorum sensing (biofilm formation, swarming motility, etc.) -Antimicrobial resistance -Molecular biology -In vitro and in vivo toxicity -Ecology, incl. determination of water quality through macrozoobenthic communities -Phytochemistry


Microbiologist Iva Tzvetkova, MS

–Pathogenic bacteria –Food-borne zoonoses –New antibacterial and antifungal agents -Antimicrobial resistance


logo-en-gr Project BG05M2OP001-1.002-0019:„Clean technologies for sustainable environment – water, waste, energy for circular economy“, financed by the Operational programme “Science and Education for Smart Growth” 2014-2020, co-financed by the European union through the European structural and investment funds. logo-en-right

About Us

The project duration is from 30 March 2018 to 30 November 2023.
Leading organization is Sofia University "St. Kliment Ohridski"

Clean&Circle aims at building effective infrastructure and research capacity to develop innovations in the circular economy focusing on water, energy and waste management.


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