{"title":"不同水质河流污水处理后N2O排放因子的细化。","authors":"Hayato Kakishima, Ayaka Kagamu, Yoshitaka Ebie, Hiroshi Yamazaki","doi":"10.2166/wst.2025.055","DOIUrl":null,"url":null,"abstract":"<p><p>Treated sewage water flowing into rivers contains nitrogen (N) compounds, producing nitrous oxide (N<sub>2</sub>O) through nitrification and denitrification reactions. In Japan, environmental reference values have been set for water quality for various locations within waterways, and these are classified into six different categories based on the level of water quality. This study aimed to refine the N<sub>2</sub>O emission factor originating from treated sewage water by conducting year-round research on the production of dissolved N<sub>2</sub>O in rivers with varying concentrations of organic matter, N, and dissolved oxygen. There were differences in the N<sub>2</sub>O emission factor derived from the nitrification reaction of ammonium (NH<sub>4</sub>)-N due to the impact of N pollution load caused by the inflow of treated sewage water into rivers with different water qualities. The calculated N<sub>2</sub>O emission factor for rivers with relatively high water quality concentrations was 0.0028 kgN<sub>2</sub>O-N kgNH<sub>4</sub>-N<sup>-1</sup>, and the calculated average N<sub>2</sub>O emission factor originating from treated sewage water in rivers was 0.0026 kgN<sub>2</sub>O-N kgNH<sub>4</sub>-N<sup>-1</sup>.</p>","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"91 9","pages":"1022-1031"},"PeriodicalIF":2.5000,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"The refinement of the N<sub>2</sub>O emission factor originating from treated sewage water in rivers with different water qualities.\",\"authors\":\"Hayato Kakishima, Ayaka Kagamu, Yoshitaka Ebie, Hiroshi Yamazaki\",\"doi\":\"10.2166/wst.2025.055\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Treated sewage water flowing into rivers contains nitrogen (N) compounds, producing nitrous oxide (N<sub>2</sub>O) through nitrification and denitrification reactions. In Japan, environmental reference values have been set for water quality for various locations within waterways, and these are classified into six different categories based on the level of water quality. This study aimed to refine the N<sub>2</sub>O emission factor originating from treated sewage water by conducting year-round research on the production of dissolved N<sub>2</sub>O in rivers with varying concentrations of organic matter, N, and dissolved oxygen. There were differences in the N<sub>2</sub>O emission factor derived from the nitrification reaction of ammonium (NH<sub>4</sub>)-N due to the impact of N pollution load caused by the inflow of treated sewage water into rivers with different water qualities. The calculated N<sub>2</sub>O emission factor for rivers with relatively high water quality concentrations was 0.0028 kgN<sub>2</sub>O-N kgNH<sub>4</sub>-N<sup>-1</sup>, and the calculated average N<sub>2</sub>O emission factor originating from treated sewage water in rivers was 0.0026 kgN<sub>2</sub>O-N kgNH<sub>4</sub>-N<sup>-1</sup>.</p>\",\"PeriodicalId\":23653,\"journal\":{\"name\":\"Water Science and Technology\",\"volume\":\"91 9\",\"pages\":\"1022-1031\"},\"PeriodicalIF\":2.5000,\"publicationDate\":\"2025-05-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Water Science and Technology\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://doi.org/10.2166/wst.2025.055\",\"RegionNum\":4,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2025/4/22 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q3\",\"JCRName\":\"ENGINEERING, ENVIRONMENTAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Water Science and Technology","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.2166/wst.2025.055","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/4/22 0:00:00","PubModel":"Epub","JCR":"Q3","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
引用次数: 0
摘要
经处理后流入河流的污水中含有氮化合物，通过硝化和反硝化反应产生氧化亚氮。在日本，对水道内不同地点的水质设定了环境参考值，并根据水质水平将这些参考值分为六个不同的类别。本研究旨在通过对不同有机物、氮和溶解氧浓度的河流中溶解N2O的产生进行全年研究，以细化处理后污水产生的N2O排放因子。由于处理后的污水流入不同水质的河流所造成的N污染负荷的影响，氨氮-N硝化反应产生的N2O排放因子存在差异。水质浓度较高的河流N2O排放系数计算值为0.0028 kgn20 - n kgNH4-N-1，河流处理污水N2O排放系数计算值平均为0.0026 kgn20 - n kgNH4-N-1。
The refinement of the N2O emission factor originating from treated sewage water in rivers with different water qualities.
Treated sewage water flowing into rivers contains nitrogen (N) compounds, producing nitrous oxide (N2O) through nitrification and denitrification reactions. In Japan, environmental reference values have been set for water quality for various locations within waterways, and these are classified into six different categories based on the level of water quality. This study aimed to refine the N2O emission factor originating from treated sewage water by conducting year-round research on the production of dissolved N2O in rivers with varying concentrations of organic matter, N, and dissolved oxygen. There were differences in the N2O emission factor derived from the nitrification reaction of ammonium (NH4)-N due to the impact of N pollution load caused by the inflow of treated sewage water into rivers with different water qualities. The calculated N2O emission factor for rivers with relatively high water quality concentrations was 0.0028 kgN2O-N kgNH4-N-1, and the calculated average N2O emission factor originating from treated sewage water in rivers was 0.0026 kgN2O-N kgNH4-N-1.
期刊介绍：
Water Science and Technology publishes peer-reviewed papers on all aspects of the science and technology of water and wastewater. Papers are selected by a rigorous peer review procedure with the aim of rapid and wide dissemination of research results, development and application of new techniques, and related managerial and policy issues. Scientists, engineers, consultants, managers and policy-makers will find this journal essential as a permanent record of progress of research activities and their practical applications.
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