西安市城镇污水系统碳排放时空特征及其主要驱动因素

刘跃廷; 张强; 蒋晓辉; 姬亚军; 原晓红; 谢文豪; 郑烈龙; 罗嘉昕

doi:10.13205/j.hjgc.202411005

西安市城镇污水系统碳排放时空特征及其主要驱动因素

doi: 10.13205/j.hjgc.202411005

西北大学城市与环境学院, 西安 710127

基金项目:

国家自然科学基金青年科学基金项目(41807342)

大气重污染成因与治理攻关项目(DQGG-05-32、DQGG202110)

国家重点研发计划项目(2019YFC0214203)

详细信息

作者简介:
刘跃廷(1997-),男,硕士研究生,主要研究方向为水污染控制技术。202121545@stumail.nwu.edu.cn

通讯作者:
张强(1983-),男,副教授,主要研究方向为水污染控制技术。zhang-qiang@nwu.edu.cn

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出版历程
- 收稿日期: 2023-05-23
- 网络出版日期: 2025-01-16

SPATIAL-TEMPORAL CHARACTERISTICS OF CARBON EMISSIONS IN URBAN SEWAGE SYSTEM IN XI’AN AND ITS DOMINANT DRIVING FACTORS

College of Urban and Environmental Sciences, Northwest University, Xi'an 710127, China

摘要

摘要: 目前我国市级污水系统碳排放研究还比较缺乏,准确掌握其排放特征及影响因素是因地制宜制定减排政策的前提。基于排放因子法核算了西安市城市污水系统各单元碳排放量,分析了其排放结构和时空分布,并结合市政设施建设和活动水平,使用SPSS软件分析其影响因素。结果表明:1)化学品消耗和电耗是污水处理单元碳排放的主要来源,而污泥处置单元直接排放的CH₄和N₂O占比较大;2)2018年开始中心城区在生物处理和污泥处置过程的人均碳排放逐渐减少,周边区县除鄠邑和长安区外人均排放均小幅提升;而2020年鄠邑和长安区人均排放增长较多;3)西安市碳排放量与A²/O工艺处理水量占比呈极显著正相关(P＜0.01),与人口规模、吨水电耗、污泥填埋量也呈显著正相关(P＜0.01),与污水集中处理率的相关性略低(P＜0.05)。中心城区减排应侧重于现有污水厂的升级改造,而周边区县污水处理设施建设应充分考虑人口因素,长安区需完善污水处理设施建设;可从源头减量和开发新型污泥处置技术2个角度来减少中心区污泥处置过程中的碳排放;周边区县应减少污泥土地填埋量。
- 西安市 /
- 城镇污水系统 /
- 时空特征 /
- 关键单元 /
- 影响因素
Abstract: At present, the research on carbon emissions of municipal sewage systems in China is still lacking, in which accurately grasping the characteristics and influencing factors of carbon emissions is the premise of formulating emission reduction policies according to local conditions. Based on the emission factor method, the carbon emissions of each unit of the urban sewage system in Xi’an were calculated and the emission structure and temporal and spatial distribution were analyzed, the influencing factors were analyzed by using SPSS software in combination with the construction and activity level of municipal facilities. The results showed that: 1) chemicals consumption and electricity consumption are the main sources of carbon emissions from sewage treatment, while CH₄ and N₂O emitting directly from sludge disposal units account for a relatively large proportion. 2) the per capita carbon emissions of the central districts in the biological treatment and sludge disposal processes gradually decreased from 2018, while the per capita emissions of the surrounding districts increased slightly, except for Huyi and Chang’an District; in 2020, the per capita emissions of Huyi and Chang’an increased significantly, while the per capita emissions of other districts increased slightly. 3) Xi’an’s carbon emissions were positively correlated with the proportion of water treated by A²/O (P<0.01), and also significantly positively correlated with population size, electricity consumption, and sludge landfill disposal amount (P<0.01), but slightly lower correlated with the sewage concentrated treatment rate (P<0.05). The reduction of per capita discharge in the central area should focus on the upgrading of existing sewage plants, while the construction of sewage treatment facilities in surrounding districts should fully consider the population factors, the construction of sewage treatment facilities in Chang’an District should be improved as soon as possible; it can reduce carbon emissions in the sludge disposal process in the central districts from two perspectives: source reduction and development of new sludge disposal technology; the surrounding districts should reduce the amount of landfill.
- Xi’an /
- municipal sewage system /
- temporal and spatial characteristics /
- dominant unit /
- influencing factor

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