Carrera Lucie, Springer Fanny, Lipeme-Kouyi Gislain, Buffiere Pierre
Laboratory of Civil and Environmental Engineering, University of Lyon, INSA-Lyon, DEEP - EA 7429, 9 rue de la Physique, F69621 Villeurbanne France E-mail:
Water Sci Technol. 2017 Apr;75(7-8):1529-1538. doi: 10.2166/wst.2017.001.
Problems related to hydrogen sulfide may be serious for both network stakeholders and the public in terms of health, sustainability of the sewer structure and urban comfort. HS emission models are generally theoretical and simplified in terms of environmental conditions. Although air transport characteristics in sewers must play a role in the fate of hydrogen sulfide, only a limited number of studies have investigated this issue. The aim of this study was to better understand HS liquid to gas transfer by highlighting the link between the mass transfer coefficient and the turbulence in the air flow and the water flow. For experimental safety reasons, O was taken as a model compound. The oxygen mass transfer coefficients were obtained using a mass balance in plug flow. The mass transfer coefficient was not impacted by the range of the interface air-flow velocity values tested (0.55-2.28 m·s) or the water velocity values (0.06-0.55 m·s). Using the ratio between k to k, the HS mass transfer behavior in a gravity pipe in the same hydraulic conditions can be predicted.
就健康、下水道结构的可持续性和城市舒适度而言，与硫化氢相关的问题对管网利益相关者和公众来说可能都很严重。硫化氢排放模型在环境条件方面通常是理论性的且较为简化。尽管下水道中的空气传输特性必定会对硫化氢的归宿产生影响，但仅有有限的研究对这一问题进行过调查。本研究的目的是通过突出传质系数与空气流和水流中的湍流之间的联系，更好地理解硫化氢从液体到气体的转移。出于实验安全考虑，选用氧气作为模型化合物。采用活塞流中的质量平衡来获得氧气传质系数。传质系数不受所测试的界面空气流速值范围（0.55 - 2.28米/秒）或水流速度值（0.06 - 0.55米/秒）的影响。利用k与k的比值，可以预测在相同水力条件下重力管道中硫化氢的传质行为。
