Abstract:
An approach to remove low concentration SO2 using biological trickling filter was studied.The results of preliminary experiment show that the optimum operating conditions are as the following:the concentration of SO2 in influent gas is 500—1000mg/m3,the gas flow is 0.1m3/h,circulated liquid flow is 15L/h and pH is 1.0.When the gas flow is changed from 100L/h to 300L/h,the SO2 removal efficiency decrease,from 86.4% to 73.2%,while the concentration of SO2 in influent gas is about 2500mg/m3,the SO2 removal efficiency can arrive to 90%.