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Liu L, Li N, Tao C, Zhao Y, Gao J, Huang Z, Zhang J, Gao J, Zhang J, Cai M. Nitrogen removal performance and bacterial communities in zeolite trickling filter under different influent C/N ratios. Environ Sci Pollut Res Int 2021; 28:15909-15922. [PMID: 33242199 DOI: 10.1007/s11356-020-11776-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Accepted: 11/19/2020] [Indexed: 06/11/2023]
Abstract
In this study, the degradation performance of nutrients in zeolite trickling filter (ZTF) with different influent C/N ratios and aeration conditions was investigated. Microaeration was beneficial for enhancing NH4+-N removal performance. Due to the sufficient carbon source supply under a C/N ratio of 8, a high removal efficiency of NH4+-N and TN was simultaneously observed in ZTF. In addition, TN removal mainly occurred at the bottom, which might be explained by the sufficient nutrients available for bacteria to multiply in this zone. The abundant genera were Acinetobacter, Gemmobacter, Flavobacterium, and Pseudomonas, all of which are heterotrophic nitrification-aerobic denitrification (HNAD) bacteria. In addition, biofilm only slowed down the adsorption rate but did not significantly reduce the adsorption capacity of zeolite. Bio-zeolite had NH4+-N well adsorption capacity and bio-desorption capacity. Biological nitrogen removal performance was superior to physicochemical absorption of zeolite. The results suggested that the physicochemical of zeolite and biochemical reactions of microorganism coupling actions may be the main nitrogen transformation pathway in ZTF. Our research provides a reference for further understanding the nitrogen removal mechanism of zeolite bioreactors.
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Affiliation(s)
- Lina Liu
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Na Li
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Chunyang Tao
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Yubo Zhao
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Jingqing Gao
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, Henan, People's Republic of China.
- Zhengzhou Yuanzhihe Environmental Protection Technology Co., Ltd., Zhengzhou, Henan, People's Republic of China.
| | - Zhenzhen Huang
- School of Water Conservancy and Engineering, Zhengzhou University, Zhengzhou, 450001, People's Republic of China
| | - Jingshen Zhang
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
- Zhengzhou Yuanzhihe Environmental Protection Technology Co., Ltd., Zhengzhou, Henan, People's Republic of China
| | - Jianlei Gao
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Jinliang Zhang
- Yellow River Engineering Consulting Co., Ltd., Zhengzhou, 450003, People's Republic of China
| | - Ming Cai
- Yellow River Engineering Consulting Co., Ltd., Zhengzhou, 450003, People's Republic of China
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