ZHAOHang,HEXing-zhuo,ZHANGZhi-qiang,et al.Spatiotemporal Distribution Characteristics and Influencing Factors of Carbon-containing Organic Matters in Sewage Pipes[J].China Water & Wastewater,2025,41(21):38-45.
污水管道中含碳有机物的时空分布特征及影响因素
- Title:
- Spatiotemporal Distribution Characteristics and Influencing Factors of Carbon-containing Organic Matters in Sewage Pipes
- 关键词:
- 污水管道; 挥发性有机物（VOCs）; 甲烷（CH4）; 时空分布特征; 影响因素
- Keywords:
- sewage pipe; volatile organic compounds (VOCs); methane (CH4); spatiotemporal distribution characteristics; influencing factor
- 摘要:
- 挥发性有机物（VOCs）和甲烷（CH4）作为重要的空气污染物与温室气体，显著影响环境质量及地球气候系统，因而实施有效减排措施对保护生态环境、实现气候目标至关重要。为探究污水管道中VOCs与CH4浓度的时空分布特征及其关键影响因素，选取西安某高校内的小流域排水系统开展实地调研，长期监测管道内VOCs浓度、CH4浓度、检查井温度及污水温度，并采集污水样本进行检测。基于调研与检测结果，分析得出气体浓度变化规律如下：两种气体浓度在污水管道中均呈现沿程递减趋势，且与检查井温度变化显著相关。最终，结合主成分分析（PCA）与多元回归分析方法，明确化学需氧量（COD）及检查井温度为VOCs与CH4的主要影响因素，且二者影响程度随环境条件变化存在差异。
- Abstract:
- Volatile organic compounds (VOCs) and methane (CH4), as significant air pollutants and greenhouse gases, exert substantial impacts on environmental quality and the earth’s climate system. Implementing effective emission reduction measures is crucial for protecting the ecological environment and achieving climate goals. To investigate the spatiotemporal distribution characteristics of VOCs and CH4 concentrations in sewage pipes and their key influencing factors, a small drainage network within a university campus in Xi’an City was selected for field investigation. Long-term monitoring was conducted on VOCs concentration, CH4 concentration, temperature of inspection well and sewage within the pipes. Sewage samples were collected for testing. Based on the investigation and testing results, the analysis revealed the following patterns of gas concentration variation: concentrations of both gases exhibited a decreasing trend along the flow path within the sewage pipes and were significantly correlated with changes in inspection well temperature. Finally, employing a combination of principal component analysis (PCA) and multiple regression analysis, chemical oxygen demand (COD) and inspection well temperature were identified as the primary influencing factors for both VOCs and CH4. Furthermore, the degree of influence exerted by these two factors varied under different environmental conditions.
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