Functional consortium for denitrifying sulfide removal process |
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| Authors: | Chuan Chen Nanqi Ren Aijie Wang Lihong Liu Duu-Jong Lee |
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| Institution: | (1) State Key Laboratory of Water Resource and Environment (SKLWRE), Harbin Institute of Technology, Harbin, 150090, China;(2) School of Municipal and Environmental Engineering, Harbin Institute of Technology, P. O. Box 2614, 202 Haihe Road, Harbin, 150090, China;(3) Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan; |
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| 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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