Removal of hydrogen sulfite in air using biofilter and bio-trickling filter
Abstract
In this study, we set-up two pilot-scale models using local materials (and therefore local microorganism) for removal of H2S in air. Experiments were conducted using a biofilter (denoted as BF, packed with cow manure, empty bed reaction time (EBRT) of 38 s) and a bio-trickling filter (denoted as BTF, packed with K3 bio-media and biofilm prepared from a local activated sludge process, EBRT of 51 s). The results indicated that the biofilter model operated more efficient than the bio-trickling filter model for H2S treatment. At inlet H2S concentration of 30 - 65 ppm (42 - 91 mg/m3), the removal efficiencies were > 99% for BT and > 96% for BTF, respectively. The effects of temperature, EBRT, and inlet concentration were also investigated for these two models. Other parameters such as humidity, pH and pressure drop were also recorded during the experiment for obtaining the suitable operational condition.
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