小型城镇污水处理厂温室气体排放特征研究

陶璇; 操家顺; 周亮; 徐润泽

doi:10.13205/j.hjgc.202609021

小型城镇污水处理厂温室气体排放特征研究

doi: 10.13205/j.hjgc.202609021

河海大学环境学院, 南京 210098

基金项目:

江苏省基础研究专项资金（软科学研究）专项资助“胞外聚合物介导下异养硝化-好氧反硝化污水脱氮系统N2O生成机制研究”（BK2041534）

详细信息

作者简介:
陶璇(1999—),男,硕士,主要研究方向为污水处理及资源化。3117659346@qq.com

通讯作者:
徐润泽(1995—),男,助理研究员,主要研究方向为污水处理及资源化。runzexu@hhu.edu.cn

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出版历程
- 收稿日期: 2025-08-04
- 网络出版日期: 2026-11-05

Greenhouse gas emission characteristics of small-town wastewater treatment plants

College of Environment, Hohai University, Nanjing 210098, China

摘要

摘要: 在城市碳排放清单中，污水处理厂是不可忽视的重要排放来源。随着城镇化推进，新建、扩建的小型城镇污水处理厂数量不断增加，其碳排放特征亟需明确以促进双碳政策的全面落实。研究结合IPCC方法与国内核算指南，对苏州某地区4座规模相近，药剂使用一致但生化工艺不同的小型城镇污水处理厂开展年度、季度及连续月度碳排放核算与特征分析。结果表明：小型城镇污水处理厂碳排放以电耗与药耗为主，两者贡献相近，碳排放强度为0.43~0.99 kg CO₂-eq/m³，工艺排放水平依次为mpaA²O-OD+mA²O<ASAO<SBR+CASS<AA/RPIR+rA²O。季节性分析发现，夏冬季药耗碳排放占比更高。电耗、药耗、生化段运行特性及水质等因素对碳排放水平的相关性分析结果显示，碳排放受多因素耦合影响，无单一显著决定因素。与大中型污水厂对比，小型厂单位处理碳排放更高。基于以上特征，提出了针对小型城镇污水处理厂的低碳优化建议。
- 小型城镇污水处理厂 /
- 处理工艺 /
- 碳排放核算 /
- 温室气体 /
- 低碳运营
Abstract: In urban carbon inventories， wastewater treatment plants （WWTPs） represent a considerable emission source that cannot be overlooked. As urbanization progresses， the continuous increase in newly constructed and expanded small-town WWTPs necessitates a clear understanding of their carbon emission characteristics to promote the effective implementation of the dual-carbon policy. This study， based on the IPCC methodology and national accounting guidelines， cond ucted carbon emission accounting and characteristic analysis on four small-town WWTPs in a certain area of Suzhou. These plants have similar treatment scales and chemical usage but differ in biological treatment processes. The analysis was performed on annual， seasonal， and consecutive monthly scales. The results showed that electricity and chemical consumption were the primary sources of carbon emissions， with comparable contributions. The carbon emission intensity ranged from 0.43 to 0.99 kg CO₂/m³. Emissions varied by process type in the following order： mpa A²O-OD + mA²O < ASAO < SBR + CASS < AA/RPIR + rA²O. Seasonal analysis revealed that the share of chemical-related emissions was higher in summer and winter. The correlation analysis of factors such as electricity consumption， chemicals consumption， operation characteristics of biochemical section， and water quality on carbon emission level showed that carbon emissions were affected by multi-factor coupling， with no single significant determinant. Compared with medium-scale and large-scale WWTPs， small-town plants exhibited higher carbon emissions per unit of treated wastewater. Based on these findings， targeted low-carbon optimization strategies were proposed for small-town WWTPs.
- small-town wastewater treatment plant /
- treatment process /
- carbon emission accounting /
- greenhouse gas /
- low-carbon operation

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