Removal Characteristics of Hydrogen Sulfide in Biofilters with Fibrous Peat and Resin

The removal characteristics of hydrogen sulfide were studied experimentally in the biofilters with fibrous peat and resin as the packed materials. The factors that influenced the removal efficiency of hydrogen sulfide were investigated. The biofilter with 100% of the peat showed higher removal capacity than the resin biofolter, but the gas flow resistance was lower in the latter. The mixture of the peat and resin as the packed material of the biofilter was proved to be an advisable method to keep the high removal capacity and reduce the gas flow resistance for a long-term operation. The flow resistance can decrease by 50% when 50% of the resin mixed with the peat, but the removal capacity was still considerable high. In addition, the removal kinetics in the biofilters were discussed, and the main kinetics parameters were determined experimentally. The maximum removal rate of hydrogen sulfide, V_max , was about 620, 210 and 480 g/m³h in the biofilters with 100% peat, 100% resin and 50% peat mixture, respectively. The result was helpful to the design and optimization of the biofilter.