Odour reducing microbial-mineral additive for poultry manure treatment Kajetan Kalus, Sebastian Opaliński, Devin Maurer, Somchai Rice, Jacek A. Koziel, Mariusz Korczyński, Zbigniew Dobrzański, Roman Kołacz, Beata Gutarowska 1 . Department of Environment Hygiene and Animal Welfare, Wroclaw University of Environmental and Life Sciences, 50-375 Wrocław, Poland 2 . Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA 50011, USA 3 . Institute of Fermentation Technology and Microbiology, Lódź University of Technology, 90-924 Łódź, Poland Frontiers of Environmental Science & Engineering,2017,11(3),7-DOI:10.1007/s11783-017-0928-4