TREATMENT OF FLUE GAS DESULFURIZING WASTE WATER

摘要

PURPOSE:To efficiently remove peroxysulfuric acid in advance and to efficiently remove the COD component by adsorption to obtain high-quality treated water by firstly regulating the pH of the flue gas desulfurizing waste water contg. peroxysulfuric acid and CCD component and bringing the water into contact with activated carbon and then with COD adsorbing resin. CONSTITUTION:The heavy metal and fluorine contained in stack gas desulfurizing waste water are separated and removed, the filtrate water is sent to a pH regulating tank 3 from a pipeline 13, and an acid such as hydrochloric acid is added to regulate the pH of the water to <=pH5 or preferably to pH3 to 5. The water is then sent to an activated-carbon adsorption tower 4 to remove peroxysulfuric acid and oxidative harmful matter. The water is then sent to a COD adsorption tower 5 to adsorptively remove the COD component with a COD adsorbing resin. High-quality treated water is obtained in this way.