Impact of influent strengths on nitrous oxide emission and its molecular mechanism in constructed wetlands treating swine wastewater
文献类型：期刊论文
| 作者 | Sun, Haishu; Wu, Shanghua ; Feng, Shugeng; Jiang, Cancan; Wang, Rui; Xu, Shengjun; Cui, Lijuan; Zhuang, Xuliang
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| 刊名 | ENVIRONMENTAL RESEARCH
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| 出版日期 | 2022-07 |
| 卷号 | 210期号:0页码:112957 |
| 关键词 | MICROBIAL COMMUNITIES ACTIVATED-SLUDGE N2O PRODUCTION FLOW REMOVAL OXYGEN BACTERIAL PLANTS |
| ISSN号 | 0013-9351 |
| 英文摘要 | Constructed wetlands (CWs) can remove nitrogen (N) through plant assimilation and microbial nitrification and denitrification, while it also releases large greenhouse gas nitrous oxide (N2O) into the atmosphere. However, N2O emissions and the underlying microbial mechanisms of CWs when treating high-strength wastewater have not been systematically surveyed. Here, the effect of three influent strengths on N2O emissions in a pilot-scale CW treatment of swine wastewater was determined and the underlying microbial mechanisms were explored. The results showed that the removal rates of ammonium (NH4+) and total nitrogen (TN) increased significantly with the increasing influent strengths, however, the ratio of N2O emission/TN removal rose by 1.5 times at the same time. Quantitation of microorganisms responsible for N-cycle in the sediment indicated that the abundance of ammonia-oxidizing bacteria (AOB) in high influent strengths (COD, 962.38 +/- 3.05 mg/L; NH4+, 317.89 +/- 4.24 mg/L) was 51.6-fold compared with that in low influent strengths (COD, 516.94 +/- 4.18 mg/L; NH4+, 100.65 +/- 2.65), and AOB gradually replaced ammonia-oxidizing archaea (AOA) to dominate ammonia oxidizers. Structural equation models demonstrated that NO2- accumulations promoted the ratio of AOB/AOA, which further led to an increase in the ratio of N2O emission/TN removal. It is worth noting both the N removal rates and N2O emissions increased with the increasing influent strength. To obtain reduced N2O emissions, pretreatment technology for strength reduction should be supplemented before high-strength wastewater enters the CWs. This study may shed new light on the sustainable operation and application of CWs. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47795]  |
| 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 |
| 通讯作者 | Zhuang, Xuliang |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Environm Biotechnol, Beijing 100085, Peoples R China 3.Beijing Key Lab Wetland Ecol Funct & Restorat, Beijing 100091, Peoples R China 4.Chinese Acad Forestry, Inst Wetland Res, Beijing 100091, Peoples R China 5.Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Haishu,Wu, Shanghua,Feng, Shugeng,et al. Impact of influent strengths on nitrous oxide emission and its molecular mechanism in constructed wetlands treating swine wastewater[J]. ENVIRONMENTAL RESEARCH,2022,210(0):112957. |
| APA | Sun, Haishu.,Wu, Shanghua.,Feng, Shugeng.,Jiang, Cancan.,Wang, Rui.,...&Zhuang, Xuliang.(2022).Impact of influent strengths on nitrous oxide emission and its molecular mechanism in constructed wetlands treating swine wastewater.ENVIRONMENTAL RESEARCH,210(0),112957. |
| MLA | Sun, Haishu,et al."Impact of influent strengths on nitrous oxide emission and its molecular mechanism in constructed wetlands treating swine wastewater".ENVIRONMENTAL RESEARCH 210.0(2022):112957. |
入库方式： OAI收割
来源：生态环境研究中心
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