Experimental researches on poultry manure combustion in co-combustion with biomass Gheorghe Lăzăroiu, Gabriel Paul Negreanu, Ionel Pîșă, Rodica Manuela Grigoriu and Dana-Alexandra Ciupăgeanu E3S Web Conf., 286 (2021) 02013 Published online: 12 July 2021 DOI: 10.1051/e3sconf/202128602013