Biological treatment of cadmium (Cd2+)-containing wastewater with sulfate as the electron acceptor and its microbial community
The pollution of cadmium (Cd) to environment is becoming increasingly serious. In this study, the ability of the continuous flow bioreactor with sulfate as the electron acceptor to remove pollutants from Cd-containing wastewater was investigated. The results show that Cd2+ could be effectively remov...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2023-01-01
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| Series: | Water Cycle |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666445323000119 |
| _version_ | 1797377843646169088 |
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| author | Jia Ouyang Qinghua Miao Dong Wei Xinxin Zhang Erming Luo Zhen Zhao Yunfa Zhao Chunying Li Li Wei |
| author_facet | Jia Ouyang Qinghua Miao Dong Wei Xinxin Zhang Erming Luo Zhen Zhao Yunfa Zhao Chunying Li Li Wei |
| author_sort | Jia Ouyang |
| collection | DOAJ |
| description | The pollution of cadmium (Cd) to environment is becoming increasingly serious. In this study, the ability of the continuous flow bioreactor with sulfate as the electron acceptor to remove pollutants from Cd-containing wastewater was investigated. The results show that Cd2+ could be effectively removed and the concentration of Cd2+ in the anaerobic effluent is less than 0.01 mg/L. Cd can affect the decomposition of urea by anaerobic sludge. In addition, ammonia nitrogen could be also effectively removed with the removal rate was approximately 72.4%. The activated sludge mainly removed Cd through the precipitation of cadmium sulfide outside the bacteria after sulfide was generated by bacterial sulfate metabolism, facilitated continuous biological removal of Cd from wastewater. Microbial community structure analysis revealed Trichococcus and Hyphomicrobium mainly occurred in anaerobic and anoxic reaction, and Sulfurovum was unique to the sulfur oxidation reaction, with a content of 10.20% and the ability to oxidize sulfide. The content of Nitrosomonas in aerobic reaction zone reached 36.75%, but no nitrifying bacteria were detected. The technology in this study, which used sulfate as the electron acceptor for the continuous biological removal of Cd2+, has future engineering application value for the treatment of wastewater containing low concentrations of Cd. |
| first_indexed | 2024-03-08T19:58:11Z |
| format | Article |
| id | doaj.art-72d7d96dc82e45c48faae0e74b964881 |
| institution | Directory Open Access Journal |
| issn | 2666-4453 |
| language | English |
| last_indexed | 2024-03-08T19:58:11Z |
| publishDate | 2023-01-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Water Cycle |
| spelling | doaj.art-72d7d96dc82e45c48faae0e74b9648812023-12-24T04:46:48ZengKeAi Communications Co., Ltd.Water Cycle2666-44532023-01-0148794Biological treatment of cadmium (Cd2+)-containing wastewater with sulfate as the electron acceptor and its microbial communityJia Ouyang0Qinghua Miao1Dong Wei2Xinxin Zhang3Erming Luo4Zhen Zhao5Yunfa Zhao6Chunying Li7Li Wei8Guangzhou HKUST Fok Ying Tung Research Institute, Guangzhou, Guangdong, 511458, ChinaSchool of Energy and Civil Engineering, Harbin University of Commerce, Harbin, 150028, ChinaState Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, China; College of Life Sciences, Northeast Forestry University, Harbin, Heilongjiang, 150040, ChinaGuangzhou HKUST Fok Ying Tung Research Institute, Guangzhou, Guangdong, 511458, ChinaGuangzhou HKUST Fok Ying Tung Research Institute, Guangzhou, Guangdong, 511458, ChinaState Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, ChinaGuangzhou HKUST Fok Ying Tung Research Institute, Guangzhou, Guangdong, 511458, ChinaSchool of Energy and Civil Engineering, Harbin University of Commerce, Harbin, 150028, China; Corresponding author.Guangzhou HKUST Fok Ying Tung Research Institute, Guangzhou, Guangdong, 511458, China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province, China; Corresponding author. Guangzhou HKUST Fok Ying Tung Research Institute, Guangzhou, Guangdong, 511458, China.The pollution of cadmium (Cd) to environment is becoming increasingly serious. In this study, the ability of the continuous flow bioreactor with sulfate as the electron acceptor to remove pollutants from Cd-containing wastewater was investigated. The results show that Cd2+ could be effectively removed and the concentration of Cd2+ in the anaerobic effluent is less than 0.01 mg/L. Cd can affect the decomposition of urea by anaerobic sludge. In addition, ammonia nitrogen could be also effectively removed with the removal rate was approximately 72.4%. The activated sludge mainly removed Cd through the precipitation of cadmium sulfide outside the bacteria after sulfide was generated by bacterial sulfate metabolism, facilitated continuous biological removal of Cd from wastewater. Microbial community structure analysis revealed Trichococcus and Hyphomicrobium mainly occurred in anaerobic and anoxic reaction, and Sulfurovum was unique to the sulfur oxidation reaction, with a content of 10.20% and the ability to oxidize sulfide. The content of Nitrosomonas in aerobic reaction zone reached 36.75%, but no nitrifying bacteria were detected. The technology in this study, which used sulfate as the electron acceptor for the continuous biological removal of Cd2+, has future engineering application value for the treatment of wastewater containing low concentrations of Cd.http://www.sciencedirect.com/science/article/pii/S2666445323000119Cd2+-containing wastewaterSulfateElectron acceptorBiological removalHigh-throughput sequencing for microorganisms |
| spellingShingle | Jia Ouyang Qinghua Miao Dong Wei Xinxin Zhang Erming Luo Zhen Zhao Yunfa Zhao Chunying Li Li Wei Biological treatment of cadmium (Cd2+)-containing wastewater with sulfate as the electron acceptor and its microbial community Water Cycle Cd2+-containing wastewater Sulfate Electron acceptor Biological removal High-throughput sequencing for microorganisms |
| title | Biological treatment of cadmium (Cd2+)-containing wastewater with sulfate as the electron acceptor and its microbial community |
| title_full | Biological treatment of cadmium (Cd2+)-containing wastewater with sulfate as the electron acceptor and its microbial community |
| title_fullStr | Biological treatment of cadmium (Cd2+)-containing wastewater with sulfate as the electron acceptor and its microbial community |
| title_full_unstemmed | Biological treatment of cadmium (Cd2+)-containing wastewater with sulfate as the electron acceptor and its microbial community |
| title_short | Biological treatment of cadmium (Cd2+)-containing wastewater with sulfate as the electron acceptor and its microbial community |
| title_sort | biological treatment of cadmium cd2 containing wastewater with sulfate as the electron acceptor and its microbial community |
| topic | Cd2+-containing wastewater Sulfate Electron acceptor Biological removal High-throughput sequencing for microorganisms |
| url | http://www.sciencedirect.com/science/article/pii/S2666445323000119 |
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