Study on biological simultaneous removal of SO2 and NOxfrom high temperature flue gas by biological trickling filter

The biological trickling filter was set up to study the influence factors of technological conditions on simultaneous desulfurization and denitrogenation of high temperature flue gas.The result revealed that sulfur dioxide and nitrogen oxides were simultaneously removed efficiently.The removal rate of SO2 was above 99.9%,and the removal rate of NOx was 60.2%,when temperature was 65 ℃,circulating liquid flow was 4.0—7.0 L/h,pH was 1.5,the residence time was 150 second,and inlet mass concentrations of SO2 and NOx were 2 000—3 000 mg/m3 and 500—1 000 mg/m3,respectively.