Comparative study of using different materials as bacterial carriers to treat hydrogen sulfide |
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Authors: | Zhiling Li Tonghua Sun Nanwen Zhu Xinde Cao Jinping Jia |
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Institution: | (1) School of Environmental Science and Engineering, Shanghai Jiao Tong University, Dongchuan Road 800, Shanghai, 200240, People’s Republic of China |
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Abstract: | The use of support media for the immobilization of microorganisms is widely known to provide a surface for microbial growth
and protect the microorganisms from inhibitory compounds. In this study, molecular sieve, granular porous carbon, and ferric
oxide desulfurizer, immobilized with autotrophic bacteria capable of oxidizing ferrous iron to ferric iron, were developed
to treat hydrogen sulfide (H2S). Their corresponding bioreactors were referred to as BMS, BPC, and BFO, respectively. H2S loading, gas retention time, hydrogen ion, and aluminous, ferric, and ferrous iron concentrations of recycling effluents
were evaluated. Thermogravimetric analysis, Brauner-Emmett-Teller method, and scanning electron microscopy were used to characterize
packing materials. Results showed that the elimination capacity was in the order of BFO > BPC > BMS. This study suggested
that the material characteristics progressively influenced the deodorization capacities of bioreactors. H2S was oxidized into elemental sulfur and oxidized sulfur species, according to differences of carriers. Furthermore, this
study revealed the potential application of simultaneously treating of H2S under extremely acidic conditions. |
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Keywords: | Biotrickling filter Hydrogen sulfide Molecular sieve Porous carbon Ferric oxide desulfurizer Autotrophic bacteria |
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