资源科学 ›› 2020, Vol. 42 ›› Issue (6): 1052-1062.doi: 10.18402/resci.2020.06.04

• 碳排放 • 上一篇    下一篇

基于“水—能—碳”关联的城市污水处理系统碳排放研究

余娇1(), 赵荣钦1(), 肖连刚1, 张林静1, 王帅1, 揣小伟2, 韩雨承1, 焦士兴3   

  1. 1.华北水利水电大学测绘与地理信息学院,郑州 450046
    2.南京大学地理与海洋科学学院,南京 210023
    3.安阳师范学院资源环境与旅游学院,安阳 455002
  • 收稿日期:2019-09-30 修回日期:2020-05-10 出版日期:2020-06-25 发布日期:2020-08-25
  • 通讯作者: 赵荣钦
  • 作者简介:余娇,女,四川雅安人,硕士研究生,研究方向为城市水系统碳排放。E-mail: yujiao987@163.com
  • 基金资助:
    国家自然科学基金项目(41971241);教育部人文社会科学项目(17YJCZH257);河南省自然科学基金项目(182300410103)

Carbon emissions of urban wastewater treatment system based on the “water-energy-carbon” nexus

YU Jiao1(), ZHAO Rongqin1(), XIAO Liangang1, ZHANG Linjing1, WANG Shuai1, CHUAI Xiaowei2, HAN Yucheng1, JIAO Shixing3   

  1. 1. School of Surveying & Geo-informatics, North China University of Water Resources and Electric Power, Zhengzhou 450046, China
    2. School of Geographic & Oceanographic Sciences, Nanjing University, Nanjing 210023, China
    3. Department of Resources & Environment and Tourism, Anyang Normal University, Anyang 455002, China
  • Received:2019-09-30 Revised:2020-05-10 Online:2020-06-25 Published:2020-08-25
  • Contact: ZHAO Rongqin

摘要:

从“水—能—碳”关联视角开展城市污水处理系统碳排放研究,有助于揭示污水处理系统中资源的流动、投入过程与碳排放的内在关系机理,并可为城市污水处理系统低碳运行和管理提供重要参考依据。本文基于“水—能—碳”关联的角度,构建了城市污水处理系统碳排放研究的理论框架和方法,以郑州市某污水处理厂为例,评估了污水处理系统运行过程不同环节的碳排放,并对各环节碳排放动态变化的影响因素进行了分析。结果表明:①城市污水处理系统碳排放中,直接碳排放占主导地位,间接碳排放中的能耗和物耗碳排放占比较小;②吨水CH4排放和吨水N2O排放主要受污水处理量和进出水水质浓度(BOD浓度和TN浓度)的影响;③吨水能耗碳排放和吨水物耗碳排放均有呈规模效应的趋势;④城市污水处理系统不同环节碳排放受污水处理工艺、污水处理量、运行工况、进出水水质要求、回用水处理率和能源消耗类型等因素影响。因此,加强城市污水处理系统的资源输入和流通过程的综合管理,推动水、能节约和碳减排的协同对于污水处理系统的低碳运行具有重要意义。

关键词: 污水处理系统, 直接碳排放, 间接碳排放, “水—能—碳”关联, 动态变化, 郑州市

Abstract:

The study on carbon emissions of urban wastewater treatment system based on the “water-energy-carbon” nexus can reveal the internal relationship between resource flow, input process, and carbon emissions of a wastewater treatment system, and can provide important references for low-carbon operation and management of wastewater treatment systems. Based on the “water-energy-carbon” nexus, a theoretical framework and accounting method of carbon emissions of urban wastewater treatment system are constructed. The wastewater treatment plant (WWTP) in Zhengzhou City was taken as a case study. Carbon emissions of different links in the operation of the wastewater treatment system were evaluated. Analysis was also made on the factors that affect the dynamic change of carbon emissions in each link of the wastewater treatment system. The research results show that: (1) Among the carbon emissions generated by the operation of the wastewater treatment system, direct carbon emissions are dominant, and indirect carbon emissions (carbon emissions of energy consumption and carbon emissions of material consumption) are relatively small. (2) CH4 and N2O emissions per unit volume of wastewater treatment are mainly affected by wastewater treatment volume and water quality. (3) Carbon emissions of energy consumption and material consumption per unit volume of wastewater treatment decrease with the increase of the wastewater treatment volume. (4) Carbon emissions of urban wastewater treatment system are impacted by many factors, such as, wastewater treatment process, wastewater treatment capacity, operating conditions, post-treatment water quality requirements, treatment rate of returned water, and energy consumption types. It is of great significance for the low carbon operation of wastewater treatment system to strengthen the comprehensive management of resource input and circulation process of urban wastewater treatment system, and to promote synergy between water, energy saving, and carbon emissions reduction.

Key words: wastewater treatment system, direct carbon emissions, indirect carbon emissions, “water-energy-carbon” nexus, dynamic change, Zhengzhou City