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- Title
Functional consortium for denitrifying sulfide removal process.
- Authors
Chuan Chen; Nanqi Ren; Aijie Wang; Lihong Liu; Duu-Jong Lee
- 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.
- Subjects
DESULFURIZATION; NITRIFYING bacteria; SULFIDES; NITRATES; CHEMICAL oxygen demand; INDUSTRIAL wastes; CARBON dioxide; SUSPENSIONS (Chemistry); SULFUR; DILUTION
- Publication
Applied Microbiology & Biotechnology, 2010, Vol 86, Issue 1, p353
- ISSN
0175-7598
- Publication type
Article
- DOI
10.1007/s00253-009-2367-z