The combustion behaviour of different waste wood species in blends with Greek, low to medium rank coal was investigated, in order to evaluate the potential utilisation of waste wood for energy generation as an option to the thermal recycling. Tests were performed in lab and pilot scale fluidised beds, as well as in an industrial moving grate. Lab-scale tests were carried out using Greek lignite, uncontaminated waste wood, demolition wood and railroad sleepers. The optimum fuel blends obtained from these tests were burnt in the 1 MWth CFBC pilot-scale installation. The effect of waste wood addition on the combustion efficiency and the CO, NOx and SO2 emissions was studied. Ash samples were collected and analysed for heavy metals concentration. Co-combustion tests were performed in a 13.8 MWth industrial steam boiler that incorporates a moving grate system. In this case, uncontaminated waste wood, MDF residues and power poles were burnt in combination with Greek lignite. Further to the investigations about the boiler operation during co-combustion, gaseous and particulate samples were collected and analysed for heavy metals, dioxins and furans. The combustion efficiency was improved in all the co-combustion experiments, while low emitted pollutants values were attained. This was especially true for the combustion of fuel blends containing MDF at the industrial boiler. Although waste wood co-combustion with lignite is an effective method for the exploitation of such solid wastes, its permanent application requires the processing of this material in an easy to handle fuel form.