Functional consortium for denitrifying sulfide removal process.
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.
Chen
Chuan
C
State Key Laboratory of Water Resource and Environment (SKLWRE), Harbin Institute of Technology, Harbin 150090, China.
Ren
Nanqi
N
Wang
Aijie
A
Liu
Lihong
L
Lee
Duu-Jong
DJ
D020627:Azoarcus / Q000145:classification / Q000235:genetics / Q000254:growth & development / Q000378:metabolism; D017753:Ecosystem; D006090:Gram-Negative Bacteria / Q000145:classification / Q000235:genetics / Q000254:growth & development / Q000378:metabolism; D007220:Industrial Waste; D009566:Nitrates / Q000378:metabolism*; D010084:Oxidation-Reduction; D010230:Paracoccus / Q000145:classification / Q000235:genetics / Q000254:growth & development / Q000378:metabolism; D011549:Pseudomonas / Q000145:classification / Q000235:genetics / Q000254:growth & development / Q000378:metabolism; D020588:Stenotrophomonas / Q000145:classification / Q000235:genetics / Q000254:growth & development / Q000378:metabolism; D013440:Sulfides / Q000378:metabolism*; D020628:Thauera / Q000145:classification / Q000235:genetics / Q000254:growth & development / Q000378:metabolism; D014865:Waste Disposal, Fluid / Q000379:methods; D014871:Water Microbiology
D007220:Industrial Waste; D009566:Nitrates; D013440:Sulfides