Abstract
Denitrifying sulfide removal (DSR) process simultaneously converts sulfide, nitrate, and chemical oxygen demand from industrial wastewaters to elemental sulfur, nitrogen gas, and carbon dioxide, respectively. This investigation utilizes a dilution-to-extinction approach at 10−2 to 10−6 dilutions to elucidate the correlation between the composition of the microbial community and the DSR performance. In the original suspension and in 10−2 dilution, the strains Stenotrophomonas sp., Thauera sp., and Azoarcus sp. are the heterotrophic denitrifiers and the strains Paracoccus sp. and Pseudomonas sp. are the sulfide-oxidizing denitrifers. The 10−4 dilution is identified as the functional consortium for the present DSR system, which comprises two functional strains, Stenotrophomonas sp. strain Paracoccus sp. At 10−6 dilution, all DSR performance was lost. The functions of the constituent cells in the DSR granules were discussed based on data obtained using the dilution-to-extinction approach.
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This project is supported by the State Key Laboratory of Water Resource and Environment (SKLWRE), Harbin Institute of Technology (HIT), China.
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Chen, C., Ren, N., Wang, A. et al. Functional consortium for denitrifying sulfide removal process. Appl Microbiol Biotechnol 86, 353–358 (2010). https://doi.org/10.1007/s00253-009-2367-z
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DOI: https://doi.org/10.1007/s00253-009-2367-z