Decarbonization, waste management and energy sustainability are still very high on the list of economic and social priorities and challenges in the European Union that need to be fully addressed in the near future. In this context, in addition to the long-standing regular use of waste wood biomass as fuel in industrial and energy combustion plants, there is still a growing level of simultaneous use of other alternative fuels, e.g. such as fuel obtained by selection and mechanical processing of municipal and industrial waste. The problem of collection and, in particular, safe and efficient permanent disposal of waste is also recognizable in Bosnia and Herzegovina. In this regard, research into the basic characteristics of pulverized combustion for various solid fuel mixtures was carried out in laboratory conditions. Specifically, this paper presents the emission values ​​of key polluting and undesirable components in flue gases resulting from co-firing tests of lignite, waste woody biomass, the fast-growing energy crop Miscanthus and RDF fuel.