ORIGINAL RESEARCH
Alternative Utilization of Protein-Rich Waste
by Its Conversion into Biogas
in Co-Fermentation Conditions
Piotr Sakiewicz1, Krzysztof Piotrowski2, Jan Cebula3, Jolanta Bohdziewicz4
Pol. J. Environ. Stud. 2017;26(3):1225-1231
ORIGINAL RESEARCH
Interaction of Polyelectrolyte Gels and Surface Active Agents
E. Zielinska, J. Maslinska-Solich*, E. Lekawska
Pol. J. Environ. Stud. 1999;8(5):327-330