Abstract
The growth curve of Thiobacillus denitrificans and pH of the culture media during the domestication process were determined to make sure the optimum condition for the removal of nitrate and sulfide in highly-concentrated wastewater.Then the ratio of sulfide to nitrate and the removing rate of NO3-were also examined in this paper.The results showed that when the S2-concentration in wastewater was 400 mg/L and the ratio of sulfide to nitrate was 5:3,the removing rate of NO3-could reach 63.19%,and S2-could simultaneously be converted into sulfate or elementary sulfur.These results indicated that Thiobacillus denitrificans had application potential in pollution control for nitrate and sulfide in wastewater.
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