A Pilot-Scale Odor Treatment Experiment of Hydrogen Sulfide by using Bio-Trickling Filter

In order to investigate the removal efficiency of hydrogen sulfide (H₂S) and adaptation of the bio-trickling filter to complicated on-site environment, deodorization experiment of H₂S was carried out continuously in cold seasons by using the bio-trickling filter packed with fiber carrier. The results suggested that removal efficiency of H₂S was higher than 99% when inlet volumetric loading of the bio-trickling filter was lower than 153 g/(m³-h) and the corresponding inlet concentration achieved 1275 mg/m in cold seasons. When effluent wastewater from secondary sedimentation tank was used as spray water that contained a small quantity of N (nitrogen), P (phosphorus) and other elements, the optimum spray water flow rates were 5.3, 7.5 and 9.5 L/h when inlet concentrations were 240, 450 and 1000 mg/m³, respectively. And meanwhile, the bio-trickling filter operated steadily and was not blocked during the experiments for nearly four months.