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Ruowen Qiang, Meng Wang, Qian Li, Yingjie Li, Huixian Sun, Wenyu Liang, Cuilan Li, Jinjing Zhang and Hang Liu
Denitrification is a key process in soil available nitrogen (N) loss. However, the effects of different water-saving irrigation systems on soil N components and denitrifying bacterial communities are still unclear. In this study, quantitative fluorescenc...
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Junyi Chen, Chao Zhang, Yun Liu, Jie Tian and Jianbo Guo
Preventing the rebound of black and odorous water bodies is critical for improving the ecological environment of water bodies. This study examined the effect and underlying mechanism of in-situ improvement of the sediment microenvironment by nitrate in t...
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Yuqi Wang, Mengrui Jie, Huining Zhang, Jia Yang and Meijuan Xu
The efficient removal of nitrate from industrial wastewater containing high concentrations of both sulfate and nitrate presents a major challenge in the field of water treatment. In this study, we investigated the use of an Upflow Anaerobic Sludge Blanke...
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Bowei Zhang, Changsheng Zhao, Ting Liu and Xiaokai Wang
As the problem of eutrophication of water bodies and nitrate pollution of surface and groundwater is becoming more and more prominent, deep denitrification of wastewater can effectively reduce the amount of nitrate nitrogen (NO3--N) discharged into natur...
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Jiawei Li, Kun Dong, Shaoyuan Bai, Yubing Fan, Yishan Feng, Meina Liang and Dunqiu Wang
A combined anaerobic?anoxic?oxic moving bed biofilm reactor (A2O-MBBR) constructed wetlands process was used to treat low carbon-to-nitrogen (C/N) simulated sewage. The results showed that the removal rates of chemical oxygen demand (COD), ammonia nitrog...
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Zhaoxu Peng, Minghui Liu, Tingmei Li, Wangcheng Zhang, Yanpeng Wang, Luji Yu and Jiantao Ji
Given increasingly prominent environmental issues, there is a pressing need to satisfy more stringent emission standards for wastewater treatment plants (WWTP) while concurrently prioritizing energy conservation; a new up-flow layered nitrogen removal fi...
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Hongyi Li, Zhaoxia Xue, Tongxin Yin, Tingfeng Liu and Zhixin Hu
Moving bed biofilm reactor (MBBR) is considered as a promising technology for wastewater treatment owing to the high biomass retention and low cost. In this study, the performance of using MBBR for partial denitrification (PD) was investigated. Denitrify...
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Huiyun Zhong, Liangfei Dong, Yuanyuan Tang, Lin Qi and Mengyu Wang
In this study, a laboratory-scale membrane aerated biofilm reactor system was operated successively through four phases with different C/N ratios (7, 5, 3, and 1) for 15 days each to investigate the C/N ratio?s effect on the COD and nitrogen removal. The...
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Dongsheng Liu, Bei Zhu, Haoyu Zhu and Jian Zhao
Set in the downstream riparian zone of Xin?an River Dam, this paper established a 2D transversal coupling flow and solute transport and reaction model by verification within situ groundwater level and temperature. The denitrifying methods and principles ...
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Yixin Yan, Dafang Fu and Jiayuan Shi
In this study, immobilized microbial beads were proposed as a solution for excessive nitrogen concentration of the river sediment. The predominant denitrifying microbes were screened from the river sediment. The optimized production of immobilized microb...
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