1. Institute of Environmental Engineering and Biotechnology, Faculty of Natural Sciences and Technology, University of Opole, St. Kominka 6, 46-020 Opole, Poland
2. Department of Hydraulic and Sanitary Engineering, Poznań University of Life Sciences, St. Piątkowska 94A, 60-649 Poznan, Poland
3. Department of Process and Environmental Engineering, Opole University of Technology, St. Mikołajczyka 5, 46-271 Opole, Poland
4. Department of Biosystems Engineering, Poznań University of Life Sciences, Wojska Polskiego 50, 60-627 Poznan, Poland