order to reduce those detrimental effects, several methods can be suggested. Forexample, the utilisation of additives such as kaolin, dolomite orlimestone, which increase the melting point of the ashes (Steenari & Lindqvist, 1998), the leaching with wateroracid (Davidsson et al., 2002) or the co-combustion with woody residues, which usually
increase the melting point of the ash. According to the biomass production and ash composition results, cattails would be more suitable for energy production than reed.