SHORT-TERM EFFECT OF THIOSULFATE ON COMPETITION BETWEEN SULFUR BACTERIA AND GLYCOGEN ACCUMULATING ORGANISMS IN SULFUR-CONTAINING WASTEWATER

ZHOU Lichang; LI Zhaoling; CHEN Lei; LIN Ya'nan; GONG Zhiwei; LIN Qingshan; MA Jie; WANG Zongping; GUO Gang

doi:10.13205/j.hjgc.202308004

Volume 41 Issue 8

Aug. 2023

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2023 > 41(8): 26-32

ZHOU Lichang, LI Zhaoling, CHEN Lei, LIN Ya'nan, GONG Zhiwei, LIN Qingshan, MA Jie, WANG Zongping, GUO Gang. SHORT-TERM EFFECT OF THIOSULFATE ON COMPETITION BETWEEN SULFUR BACTERIA AND GLYCOGEN ACCUMULATING ORGANISMS IN SULFUR-CONTAINING WASTEWATER[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(8): 26-32. doi: 10.13205/j.hjgc.202308004

Citation:

ZHOU Lichang, LI Zhaoling, CHEN Lei, LIN Ya'nan, GONG Zhiwei, LIN Qingshan, MA Jie, WANG Zongping, GUO Gang. SHORT-TERM EFFECT OF THIOSULFATE ON COMPETITION BETWEEN SULFUR BACTERIA AND GLYCOGEN ACCUMULATING ORGANISMS IN SULFUR-CONTAINING WASTEWATER[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(8): 26-32. doi: 10.13205/j.hjgc.202308004

Citation:

ZHOU Lichang, LI Zhaoling, CHEN Lei, LIN Ya'nan, GONG Zhiwei, LIN Qingshan, MA Jie, WANG Zongping, GUO Gang. SHORT-TERM EFFECT OF THIOSULFATE ON COMPETITION BETWEEN SULFUR BACTERIA AND GLYCOGEN ACCUMULATING ORGANISMS IN SULFUR-CONTAINING WASTEWATER[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(8): 26-32. doi: 10.13205/j.hjgc.202308004

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SHORT-TERM EFFECT OF THIOSULFATE ON COMPETITION BETWEEN SULFUR BACTERIA AND GLYCOGEN ACCUMULATING ORGANISMS IN SULFUR-CONTAINING WASTEWATER

doi: 10.13205/j.hjgc.202308004

1. School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;
2. East China Electric Power Design Institute, CPECC, Shanghai 200333, China;
3. Wuhan Municipal Engineering Design & Research Institute Co., Ltd., Wuhan 430023, China;
4. China Railway Fourth Survey and Design Institute Group Co., Ltd., Wuhan 430063, China

Received Date: 2022-10-06
Available Online: 2023-11-15

Abstract

Abstract

Sulfur bacteria, including sulfate-reducing bacteria and sulfur-oxidizing bacteria, as the main functional bacteria of the denitrifying sulfur conversion-associated enhanced biological phosphorus removal (DS-EBPR) process, is susceptible to the competition with glycogen accumulating organisms, resulting in fluctuations in phosphorus removal efficiency. Thiosulfate has high bioavailability and is widely used in the treatment of sulfur-containing wastewater. To explore the short-term effect of thiosulfate on the competition between sulfur bacteria and glycogen-accumulating organisms, different concentrations of thiosulfate [20 (R1), 50 (R2) and 80 mg S/L (R3)] were added to the system enriched with sulfur bacteria and glycogen accumulating organisms to monitor the changes of key ions and bacterial intracellular polymers in the reactors. The results showed that when the dosage of thiosulfate increased from 20 to 50 mg S/L, the amount of sulfate production and polysulfide degradation in the anoxic stage increased by 25% and 11%, respectively, and the amount of PHA degradation, glycogen production decreased by 1.60 and 0.94 mmol C/g VSS, respectively; when the dosage further increased to 80 mg S/L, the degradation of polysulfide of R3 decreased by 37%, and the amount of PHA degradation and glycogen production increased by 1.08 and 0.12 mmol C/g VSS, respectively, compared with that of R2. The results showed that when an appropriate amount of thiosulfate (50 mg S/L) was added, sulfur-oxidizing bacteria would preferentially utilize thiosulfate for electron donors when they competed with glycogen accumulating organisms, which was beneficial to enhancing the competitive advantage of sulfur-oxidizing bacteria. At the same time, the results of chemical reaction kinetics in the anoxic stage showed that the addition of thiosulfate could increase the sulfate production and denitrification rate of sulfur bacteria, thereby promoting the activity of sulfur bacteria. Although the addition of thiosulfate could maintain a good denitrification effect in the reactors, it did not significantly improve the phosphorus removal efficiency.
- sulfur-containing wastewater,
- sulfur bacteria,
- glycogen accumulating organisms,
- thiosulfate,
- competition

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References(28)

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