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Prototype Scale Simulation on hazardous gas advection and diffusion affected by enhanced ventilation in sewage networks using Ventsim
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Zhi-qiang ZHANG1, 2, *, Lei ZHAO1, Jia-hao WANG1, Hong-lin YUAN1, Jin-suo LU1
China Environmental Science | 2025, 45(9) : 4896 - 4903
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China Environmental Science | 2025, 45(9): 4896-4903
• Water Pollution Control •
Prototype Scale Simulation on hazardous gas advection and diffusion affected by enhanced ventilation in sewage networks using Ventsim
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Zhi-qiang ZHANG1, 2, *, Lei ZHAO1, Jia-hao WANG1, Hong-lin YUAN1, Jin-suo LU1
Affiliations
  • 1.School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
  • 2.State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China
Published: 2025-09-20
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This study investigated the advection and diffusion patterns of hydrogen sulfide (H2S) in a prototype sewer network of a residential area in Xi'an, using Ventsim to simulate both natural and forced ventilation conditions. The results show that the simulated and measured values are within 10% difference, which confirms the reliability of the Ventsim simulation method. Forced ventilation increased the air velocity in sewer pipes by 8.8% compared to natural ventilation conditions. It was further found that utilizing only an intake or exhaust fan required 108s and 105s, respectively to completely expel hazardous gases from the sewage network. Simultaneous operation of both intake and exhaust fans significantly enhanced the migration rate of harmful gases, reducing the expulsion time to 55s. Nevertheless, using only an intake fan may cause H2S to escape through small openings on manhole covers. These findings provide technical support for predicting and controlling hazardous gases within sanitary sewer networks, contributing to infrastructure safety and operational maintenance.

urban sewage pipelines  /  harmful gases  /  diffusion law  /  Ventsim  /  enhanced ventilation technology
张志强, 赵磊, 王佳豪, 袁宏林, 卢金锁. 基于Ventsim原尺度模拟强化通风前后污水管道内有害气体迁移扩散规律. 中国环境科学, 2025 , 45 (9) : 4896 -4903 .
Zhi-qiang ZHANG, Lei ZHAO, Jia-hao WANG, Hong-lin YUAN, Jin-suo LU. Prototype Scale Simulation on hazardous gas advection and diffusion affected by enhanced ventilation in sewage networks using Ventsim[J]. China Environmental Science, 2025 , 45 (9) : 4896 -4903 .
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Year 2025 volume 45 Issue 9
81
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  • Receive Date：2025-02-20
  • Online Date：2026-10-08
  • Published：2025-09-20
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  • Received：2025-02-20
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Affiliations
    1.School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
    2.State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China
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表12种不同金属材料的力学参数
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小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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