化工进展 ›› 2021, Vol. 40 ›› Issue (12): 6897-6906.DOI: 10.16085/j.issn.1000-6613.2020-2565

• 资源与环境化工 • 上一篇    下一篇

污水处理厂运行工况对温室气体排放的影响

李东梅(), 吴丹萍, 吴敏(), 潘波   

  1. 昆明理工大学环境科学与工程学院,云南省土壤固碳与污染控制重点实验室,云南 昆明 650500
  • 收稿日期:2020-12-25 修回日期:2021-03-17 出版日期:2021-12-05 发布日期:2021-12-21
  • 通讯作者: 吴敏
  • 作者简介:李东梅(1996—),女,硕士研究生,研究方向为污水处理厂温室气体的排放。E-mail:3053539684@qq.com
  • 基金资助:
    国家自然科学基金(41977334);云南省重点科技计划(202001AS070015)

Influence of operating parameters on greenhouse gas emission of sewage treatment plants

LI Dongmei(), WU Danping, WU Min(), PAN Bo   

  1. Yunnan Provincial Key Lab of Carbon Sequestration and Pollution Control in Soils, Faculty of Environmental Science and Engineering, Kunming University of Science & Technology, Kunming 650500, Yunnan, China
  • Received:2020-12-25 Revised:2021-03-17 Online:2021-12-05 Published:2021-12-21
  • Contact: WU Min

摘要:

市政污水处理厂是城市的重要基础设施之一,其因在运行过程中产生大量的CO2、CH4和N2O等气体而被视为温室气体(GHGs)的重要来源之一,同时又因其减排潜力较大,引起了各界学者的广泛关注。GHGs减排需求正推动着污水处理厂朝着优化核心运行参数及资源能源回收的低碳方向发展。本文简述了污水处理厂中GHGs直接排放的主要环节和产生机理以及目前常用核算方法中存在的主要问题,并总结了污水处理厂运行工况的变化,包括温度、pH、进水C/N、污泥停留时间(SRT)、亚硝酸盐浓度、溶解氧(DO)浓度对其直接排放的GHGs的影响。分析表明进水C/N、DO浓度、pH和亚硝酸盐浓度对GHGs的排放影响较为明显且它们的变化更易于进行人为干预,人为减排潜力较大。最后总结了目前已有相关研究存在的主要问题以及对未来研究方向的展望,以期为污水处理厂优化运行工况和GHGs减排提供参考。

关键词: 温室气体, 整体优化, 废水处理, 运行工况, IPCC核算模型, 减排

Abstract:

The sewage treatment plants are one of the important infrastructures of the cities. They are regarded as one of the important sources of greenhouse gases (GHGs) due to the mass production of CO2, CH4, N2O and other gases during the operation. It has attracted widespread attention from scholars because of the great potential for emission reduction. The demand for GHGs emission reduction is driving the development of sewage treatment plants in a low-carbon direction that optimizes core operating parameters and resource and energy recovery. The main paths of GHGs generation, the main problems in present methodologies were described and the changes of different operating conditions of sewage treatment plants on their direct GHGs emissions were summarized. The analysis showed that the influent C/N, dissolved oxygen (DO) concentration, pH and nitrite concentration had obvious impacts on GHGs emissions, and these parameters are easier to be adjusted. Finally, the main problems existing in the relevant research and the prospects of the future research direction were summarized and prospected in order to provide a reference for the optimization of the operating conditions and GHGs emission reduction of the sewage treatment plants.

Key words: greenhouse gases, overall optimization, sewage treatment, operating parameters, IPCC account model, emission reduction

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