METHODS AND SYSTEMS FOR BIOLOGICAL TREATMENT OF FLUE GAS DESULFURIZATION WASTEWATER

摘要

Systems and methods of treating flue gas and wastewater generated by treating the flue gas are disclosed and include introducing the flue gas, a flue gas treatment fluid that removes sulfur dioxide from the flue gas; and an organic acid conditioning agent into a wet-oxidation scrubber /absorber; (16, 14) introducing FGD scrubber wastewater generated by the wet-oxidation scrubber/absorber into an anoxic biological reactor (54) to substantially denitrify the FGD scrubber wastewater; and introducing resulting substantially denitrified FGD scrubber wastewater into an anaerobic biological reactor (56) to substantially reduce the amount of sulfate and/or selected heavy metals in the FGD scrubber wastewater.