城镇污水处理厂N<sub>2</sub>O排放:排放特征及控制措施

张亦藜; 刘辉; 钱晓雍

doi:10.13205/j.hjgc.202404002

城镇污水处理厂N₂O排放:排放特征及控制措施

doi: 10.13205/j.hjgc.202404002

上海市环境科学研究院,上海 200233

基金项目:

上海市生态环境局科研项目"基于'三水统筹’的上海市水生态环境保护实用技术研究"(沪环科[2023]第3号)

上海市科委技术标准项目"城镇污水处理厂温室气体排放核算标准研究及信息化平台应用"(22DZ2200100)

详细信息

作者简介:
张亦藜(1993-),女,工程师,主要研究方向为城镇排水系统碳排放监测。lilyzyl@126.com

通讯作者:
钱晓雍(1981-),男,高级工程师,主要研究方向为水生态环境保护和污水资源化。qianxy@saes.ch.cn

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- 被引次数: 0
出版历程
- 收稿日期: 2024-01-10
- 网络出版日期: 2024-06-01

N₂O EMISSION FROM MUNICIPAL WASTEWATER TREATMENT PLANTS: EMISSION CHARACTERISTICS AND CONTROL STRATEGIES

Shanghai Academy of Environmental Science,Shanghai 200233, China

摘要

摘要: 城镇污水处理厂是重要的氧化亚氮(N₂O)排放源。归纳了不同地域、不同工艺城镇污水处理厂N₂O排放特征,从运行参数优化和新技术开发与应用层面分析了N₂O减排措施。我国城镇污水处理厂N₂O排放量呈现出东部地区高于西部地区、污水处理高于污泥处理的特征。在"双碳"背景下,N₂O减排不宜以NO等副产物和能耗的增加为代价。城镇污水处理厂可采用敞开式池体加盖加罩、精确曝气系统等工程措施,在无大幅电耗增加的前提下最大限度改善反应条件,实现城镇污水处理厂N₂O减排;同时,推进好氧颗粒污泥、厌氧氨氧化、耦合好氧-缺氧氮分解工艺等新技术产业化,并将尾水及侧流污水N₂O处理设施纳入建设,助力城镇污水处理厂近零排放。总的来说,运行参数的完善和技术的进步有助于城镇污水处理厂N₂O减排,对实现城镇污水处理厂低碳运行意义深远。
- 城镇污水处理厂 /
- 减污降碳 /
- N2O /
- 排放特征 /
- 运行参数 /
- 新技术
Abstract: Municipal wastewater treatment plants (MWWTPs) are regarded as one of the important nitrous oxide (N₂O) emission sources. In this paper, emission characteristics of N₂O from different areas and various treatment processes were summarized. Meanwhile, N₂O mitigation strategies concerning the optimization of operation parameters as well as the development and application of novel technologies were proposed. According to previous studies, N₂O emission from MWWTPs in East China was higher than that in West China. Moreover, N₂O emission through wastewater treatment processes was higher than that from sludge treatment systems. In the context of achieving the "carbon peaking and carbon neutrality" goals of China, N₂O mitigation should not be realized at the expense of producing by-products like NO and increasing energy consumption. Engineering measures, such as sealing the reaction tanks and installing accurate aeration systems, could reduce N₂O emissions from MWWTPs without a substantial increase in electricity expense. Promoting industrialization of novel technologies (including but not limited to aerobic granular sludge, anaerobic ammonium oxidation, and coupled aerobic-anoxic nitrous decomposition operation), along with building N₂O reduction facilities for tailwater and sidestream treatment could promote the realization of net zero carbon emission MWWTPs. In general, operation parameters optimization and novel technology development are profitable for N₂O mitigation, which is of far-reaching significance for actualizing the low-carbon operation of MWWTPs.
- municipal wastewater treatment plant /
- reduction of pollution and carbon emission /
- N₂O /
- emission characteristics /
- operation parameter /
- novel technology

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