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| Reduction of Sulfate in Groundwater by Sulfate Reducing Bacteria Using Corn Fermentation Broth as Carbon Source |
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Received:February 02, 2024
Revised:February 06, 2024
Accepted:February 20, 2024
Published Online:April 16, 2024
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| DOI：doi：10.3969/j.issn.1007-7545.2024.05.021 |
| KeyWord:sulphate reducing bacteria; corn fermentation broth; influencing factors; sulfate wastewater |
| Author | Institution |
| ZHANG Ziyan |
东华理工大学水资源与环境工程学院 |
| LI Zebing |
东华理工大学水资源与环境工程学院 |
| ZHENG Yu |
东华理工大学水资源与环境工程学院 |
| CHENG Jianguang |
新疆中核天山铀业有限公司 |
| FANG Jingnan |
东华理工大学水资源与环境工程学院 |
| TANG Yingyi |
东华理工大学水资源与环境工程学院 |
| SUN Zhanxue |
东华理工大学水资源与环境工程学院 |
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| Abstract: |
| Using corn fermentation broth as the carbon source for microbial sulfate reduction system can significantly reduce the cost of reduction, which is of great significance in realizing the economic and efficient treatment of sulfate wastewater. The effects of ratio of composite carbon source, ratio of carbon to sulfur (CODcr/SO42-, C/S) and pH value on the reduction of sulfate by sulfate reducing bacteria (SRB) were investigated. The results show that when the initial concentration of SO42- is (1 000±50) mg/L, the five composite carbon source ratios are able to obtain better sulfate reduction effect, and the residual concentration of SO42- is less than that of the groundwater quality standard Class Ⅳ water quality of 350 mg/L. When the initial C/S ratio is in the range of 0—3.5, with the increase of the C/S ratio, the sulfate reduction rate by SRB increases, but the remaining sulfate reduction utilization efficiency of carbon source decreases. The sulfate reducing activity of SRB is the best when the initial pH value is close to 7.0. The changes in pH value and ORP of the reaction system can accurately indicate changes in bacterial activity. |
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