Abstract: To develop a cost-effective collaborative control technology for organic waste and flue gas NO_x emissions, common denitrification agents (such as ammonia and urea) were substituted with sodium acrylate, industrial alcohol and benzene sulfonate high concentration organic wastewater. The impacts of temperature, oxygen content, residence time, mixing mode of water and gas and other parameters on the flue gas denitrification were tested on a coal-fired test furnace in a hot state. The results showed that the denitrification efficiencies of sodium acrylate, alcohol and naphthalene sulfonate wastewater were only 12.7%, 14.2% and 9.1% respectively when the temperature was 1190 K. Comparatively, the efficiencies reached 37.6%, 39.8% and 35.9% respectively when the temperature was 1360 K. The efficiency decreased when the temperature was higher than 1360 K. When O₂ content increased from 4.1% to 5.2%, the denitrification efficiency decreased by about 21.5%,13.1% and 15.7%. While O₂ content increased to 6.8%, the efficiency decreased from 11.2% to 13.6%. When sodium acrylate wastewater was injected into the flues at 1185 and 1303 K, the denitrification efficiency of the reverse injection mode increased by 30.4% and 19.3% than that of the forward injtction mode, respectively. The denitrification efficiencies increased by 16.0%, 18.8% and 16.6% when the residence time increased from 0.67 s to 0.82 s.