The conference brought together scientists, academics, doctoral students and early-career researchers from Bulgaria and abroad to present recent advances in natural sciences, biotechnology and environmental protection. Clean&Circle's participation highlighted the development of new methods for water monitoring and treatment, the application of innovative technologies and opportunities for the efficient use of resources.

Among the participants in the scientific programme was Assoc. Prof. Mihaela Kirilova, PhD, from Sofia University, who presented the potential of fluorescence in situ hybridisation (FISH) for investigating complex microbial communities. The method enables the identification and monitoring of microorganisms in different environments and has important applications in assessing biological processes in water treatment technologies.

The conference programme also featured research conducted by Clean&Circle scientists on interactions between microplastics and microorganisms in wastewater, the effects of cold atmospheric plasma on bacterial cells, and the impact of seasonal fluctuations on the operation of wastewater treatment plants. Research into microbiological processes involved in the anaerobic degradation of waste was also presented.

The scientific programme also included research by a team from the University of Architecture, Civil Engineering and Geodesy, a Clean&Circle partner, focusing on the use of microalgae for advanced wastewater treatment and the recovery of valuable resources.

At the Centre's information stand, visitors had the opportunity to learn about its main research areas, the technologies under development and their potential for practical application.

Participation in Kliment's Days 2026 provided an opportunity to showcase research achievements, exchange expertise and strengthen cooperation among researchers from different scientific disciplines.

Clean&Circle's activities are also carried out within the framework of Project No. BG16RFPR002-1.014-0015, "Centre of Competence Clean Technologies for Sustainable Environment – Water, Waste, Energy for Circular Economy", funded under the Research, Innovation and Digitalisation for Smart Transformation Programme (PNIIDIT), with the support of the European Union.