Abstract: A bench-scale experiment for control of hydrogen sulfide (H₂S) emissions was carried out continuously for nearly four months by using bio-trickling filter packed with ZX01 stuffing. The results suggested that the bio-trickling filter had proven excellent performance over substantial operational periods. Removal efficiency of H₂S was nearly 100% when volumetric loading of the bio-trickling filter varied from 0.64 g/(m³·h) to 38.20 g/(m³·h) and metabolism products of H₂S were mainly composed of SO₄^2–. When inlet concentration of H₂S was 250 mg/m³, the optimum gas retention time was 30 s and the optimum spray water flow rate was 0.005 9~0.012 L/(cm²·h). The bio-trickling filter had good ability to resist shock of high volumetric loading, and was not blocked during experiments for nearly four months during which resistance was maintained at relatively lower value, so that the bio-trickling filter need not carry out back washing frequently and can be operated steadily for long-term.

Key words: Bio-trickling filter, Hydrogen sulfide, Carrier, Deodorization

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