Element sulfur-based autotrophic denitrification constructed wetland as an efficient approach for nitrogen removal from low C/N wastewater
文献类型：期刊论文
| 作者 | Wang, Hong-cheng ; Liu, Ying; Yang, Yu-meng; Fang, Ying-ke; Luo, Shuang; Cheng, Hao-yi; Wang, Ai-jie
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| 刊名 | WATER RESEARCH
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| 出版日期 | 2022 |
| 卷号 | 226页码:119258-1-12 |
| 关键词 | Sulfur autotrophic denitrification Constructed wetlands Nitrogen removal Low C/N Nitrogen and sulfur cycle |
| ISSN号 | 0043-1354 |
| 英文摘要 | Constructed wetlands (CWs) integrated with sulfur autotrophic denitrification to stimulate high-rate nitrogen removal from carbon-limited wastewater holds particular application prospect due to no excessive carbon source addition, high efficiency, and good stability. In this study, we conducted elemental sulfur-based constructed wetland (SCW) and traditional constructed wetland (CW) under different C/N (2, 1, and 0.5) to explore the feasibility and mechanisms for nitrogen removal from low C/N wastewater. Compared with CW, SCW was demonstrated more robust in nitrogen removal in the case of low C/N influent. When the influent C/N control was at 0.5, SCW observed total nitrogen (TN) and nitrate removal efficiency of 69.36 +/- 3.96% and 81.71 +/- 3.96%, with the corresponding removal rate of 1.18 +/- 0.66 and 1.70 +/- 0.92 g-N.m(-)(2).d(-1) , which were 2.11 and 10.03 times of CW, respectively. The nitrate removal rate constant k in the SCW was 1.05, 3.83, and 10.33 times higher than the CW with C/N of 2, 1 and 0.5. Furthermore, 14.40, 54.51, and 79.82% of nitrogen were removed by the sulfur autotrophic denitrification (SAD) in SCW, which also contributed 43.89, 73.68, and 71.70% of sulfate production. Moreover, the combined system of CW-SCW is proved be an efficient operation mode for simultaneously removing total ammonia nitrogen (TAN) and nitrate. In the SCW, the richness of the microbial community was improved and sulfur-oxidizing genera (e.g. Thiobacillus, Sulfurimonas) was selectively enriched, which affect the performance the elemental sulfur-based denitrification process. The nitrate reduction pathway was overwhelmed by denitrification and the dissimilatory nitrate reduction process. These findings offer elemental sulfur-based autotrophic denitrification constructed wetland has excellent potential to enhance nitrogen removal from carbon-limited wastewater. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/48554]  |
| 专题 | 生态环境研究中心_中国科学院环境生物技术重点实验室 |
| 作者单位 | 1.Research Center for Eco-Environmental Sciences (RCEES) 2.Chinese Academy of Sciences 3.Liaoning University 4.Harbin Institute of Technology |
| 推荐引用方式 GB/T 7714 | Wang, Hong-cheng,Liu, Ying,Yang, Yu-meng,et al. Element sulfur-based autotrophic denitrification constructed wetland as an efficient approach for nitrogen removal from low C/N wastewater[J]. WATER RESEARCH,2022,226:119258-1-12. |
| APA | Wang, Hong-cheng.,Liu, Ying.,Yang, Yu-meng.,Fang, Ying-ke.,Luo, Shuang.,...&Wang, Ai-jie.(2022).Element sulfur-based autotrophic denitrification constructed wetland as an efficient approach for nitrogen removal from low C/N wastewater.WATER RESEARCH,226,119258-1-12. |
| MLA | Wang, Hong-cheng,et al."Element sulfur-based autotrophic denitrification constructed wetland as an efficient approach for nitrogen removal from low C/N wastewater".WATER RESEARCH 226(2022):119258-1-12. |
入库方式： OAI收割
来源：生态环境研究中心
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