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.
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Spatiotemporal Distribution Characteristics and Influencing Factors of Carbon-containing Organic Matters in Sewage Pipes

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第41卷 Number: 第21期 Page: 38-45 Column: Date of publication: 2025-11-01
Author(s):
ZHAO　Hang1; 2;  HE　Xing-zhuo1; 2;  ZHANG　Zhi-qiang1; 2;  HUANG　Yu-jie1; 2;  LU　Jin-suo1; 2
（1. College of Environmental and Municipal Engineering， Xi’an University of Architecture and Technology， Xi’an 710055， China； 2. Shaanxi Key Laboratory of Environmental Engineering， Xi’an 710055， China）
Keywords:
sewage pipe;  volatile organic compounds (VOCs);  methane (CH4);  spatiotemporal distribution characteristics;  influencing factor
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.
Last Update: 2025-11-01