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- Title
Isolation and Characterization of Altererythrobacter sp. DT for Biotreatment of and Sulfur Production from Thiosulfate-Bearing Industrial Wastewater.
- Authors
Gu, Xiang; Dou, Pei
- Abstract
The objectives of the present study are to isolate thiosulfate-degrading bacterium and optimize its degradative conditions including temperature, pH, and thiosulfate concentrations required for bioremediation purposes. A heterotrophic thiosulfate-degrading bacterial strain DT was successfully isolated from saline soil and identified as Altererythrobacter sp. based on its physicochemical properties and 16S rDNA sequence analysis. It was a naturally occurring methionine auxotrophic strain that utilized only peptone, yeast extract, or several amino acids as the sole carbon source. Altererythrobacter sp. DT degraded thiosulfate via a distinctive disproportionation reaction which was characterized by accumulation of sulfate and elemental sulfur at a molar ratio of 1:1. Optimal conditions for both bacterial growth and thiosulfate metabolism were 25-30 °C and pH 6, respectively. In a fed-batch treatment system receiving liquid polysulfide wastewater, a high degradation rate of 407.3 mg SO /(L h) and an elemental sulfur yield of nearly 50% were achieved for immobilized DT cells, indicating great potential of strain DT for future application in the treatment of and microbial production of elemental sulfur from thiosulfate-bearing industrial wastewater.
- Subjects
TRICHLOROETHYLENE; THIOSULFATES; SEWAGE; BIOREMEDIATION; METHIONINE; DISPROPORTIONATION (Chemistry)
- Publication
Water, Air & Soil Pollution, 2017, Vol 228, Issue 1, p1
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1007/s11270-016-3215-2