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{"title":"Estimating nitrous oxide emissions based on TN discharge from municipal wastewater treatment plants: A case study for the city of Xiamen, China","authors":"Ruolin Bai, Lei Jin, Haiyan Fu, Mazhan Zhuang, Yi Wei","doi":"10.1002/ghg.2230","DOIUrl":null,"url":null,"abstract":"<p>Mitigation of nitrous oxide (N<sub>2</sub>O) emissions is of primary importance to meet the targets of reducing carbon footprints of wastewater treatment plants (WWTPs). This paper takes the N<sub>2</sub>O discharged from a case study of wastewater treatment plants as the main research object, and then develops a novel algorithm, which can accurately estimate the amount of N<sub>2</sub>O release, and then applies it to the local wastewater treatment plants. According to the results, the nitrous oxide emission flux and the emission factors (EFs) are discussed. The results include the following: (1) The total amount of N<sub>2</sub>O discharged from Xiamen wastewater treatment plants between 2018 and 2019 was 3881.29 kg and 3642.97 kg, respectively; (2) the production of N<sub>2</sub>O emissions based on the total nitrogen (TN) algorithm in the existing wastewater treatment factories in Xiamen was obtained based on the research EFs; and (3) by controlling other factors of WWTPs process such as chemical oxygen demand /nitrogen (COD)/ (N) ratio, dissolved oxygen (DO) concentration, pH value (the degree of concentration of hydrogen ions), and solids retention time (SRT) in the wastewater treatment process, selecting a secondary wastewater treatment process with an economical and reasonable approach can reduce N<sub>2</sub>O emissions in the wastewater treatment process. © 2023 Society of Chemical Industry and John Wiley & Sons, Ltd.</p>","PeriodicalId":12796,"journal":{"name":"Greenhouse Gases: Science and Technology","volume":null,"pages":null},"PeriodicalIF":2.7000,"publicationDate":"2023-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Greenhouse Gases: Science and Technology","FirstCategoryId":"93","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/ghg.2230","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
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Abstract
Mitigation of nitrous oxide (N2 O) emissions is of primary importance to meet the targets of reducing carbon footprints of wastewater treatment plants (WWTPs). This paper takes the N2 O discharged from a case study of wastewater treatment plants as the main research object, and then develops a novel algorithm, which can accurately estimate the amount of N2 O release, and then applies it to the local wastewater treatment plants. According to the results, the nitrous oxide emission flux and the emission factors (EFs) are discussed. The results include the following: (1) The total amount of N2 O discharged from Xiamen wastewater treatment plants between 2018 and 2019 was 3881.29 kg and 3642.97 kg, respectively; (2) the production of N2 O emissions based on the total nitrogen (TN) algorithm in the existing wastewater treatment factories in Xiamen was obtained based on the research EFs; and (3) by controlling other factors of WWTPs process such as chemical oxygen demand /nitrogen (COD)/ (N) ratio, dissolved oxygen (DO) concentration, pH value (the degree of concentration of hydrogen ions), and solids retention time (SRT) in the wastewater treatment process, selecting a secondary wastewater treatment process with an economical and reasonable approach can reduce N2 O emissions in the wastewater treatment process. © 2023 Society of Chemical Industry and John Wiley & Sons, Ltd.
基于城市污水处理厂总氮排放估算一氧化二氮排放量:以厦门市为例
减少一氧化二氮(N2O)排放对于实现减少废水处理厂(WWTPs)碳足迹的目标至关重要。本文以某污水处理厂的N2O排放为主要研究对象,开发了一种新颖的算法,可以准确估算N2O的排放量,并将其应用于当地的污水处理厂。根据实验结果,讨论了氧化亚氮的排放通量和排放因子。结果表明:(1)2018 - 2019年厦门市污水处理厂N2O排放总量分别为3881.29 kg和3642.97 kg;(2)基于研究结果,得到厦门市现有污水处理厂基于总氮(TN)算法产生的N2O排放量;(3)通过控制污水处理过程中化学需氧量/氮(COD)/氮(N)比、溶解氧(DO)浓度、pH值(氢离子浓度)、固相滞留时间(SRT)等因素,选择经济合理的污水二级处理工艺,减少废水处理过程中N2O的排放。©2023化学工业协会和John Wiley &儿子,有限公司
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