Entidad Pública de Saneamiento de Aguas Residuales de la Comunidad Valenciana (EPSAR), Valencia, Spain.
J Air Waste Manag Assoc. 2012 Jul;62(7):758-66. doi: 10.1080/10962247.2012.674008.
The management and operation of wastewater treatment plants (WWTP) usually involve the release into the atmosphere of malodorous substances with the potential to reduce the quality of life of people living nearby. In this type of facility, anaerobic degradation processes contribute to the generation of hydrogen sulfide (H2S), often at quite high concentrations; thus, the presence of this chemical compound in the atmosphere can be a good indicator of the occurrence and intensity of the olfactory impact in a specific area. The present paper describes the experimental and modelling work being carried out by CEAM-UMH in the surroundings of several wastewater treatment plants located in the Valencia Autonomous Community (Spain). This work has permitted the estimation of H2S emission rates at different WWTPs under different environmental and operating conditions. Our methodological approach for analyzing and describing the most relevant aspects of the olfactory impact consisted of several experimental campaigns involving intensive field measurements using passive samplers in the vicinity of several WWTPs, in combination with numerical simulation results from a diagnostic dispersion model. A meteorological tower at each WWTP provided the input values for the dispersion code, ensuring a good fit of the advective component and therefore more confidence in the modelled concentration field in response to environmental conditions. Then, comparisons between simulated and experimental H2S concentrations yielded estimates of the global emission rate for this substance at several WWTPs at different time periods. The results obtained show a certain degree of temporal and spatial (between-plant) variability (possibly due to both operational and environmental conditions). Nevertheless, and more importantly, the results show a high degree of uniformity in the estimates, which consistently stay within the same order of magnitude.
污水处理厂（WWTP）的管理和运营通常涉及到恶臭物质的排放，这些物质有可能降低附近居民的生活质量。在这种设施中，厌氧降解过程会产生硫化氢（H2S），其浓度通常相当高；因此，大气中这种化学物质的存在可以很好地指示特定区域发生和强度的嗅觉影响。本文介绍了 CEAM-UMH 在西班牙巴伦西亚自治区（Spain）的几个污水处理厂周围进行的实验和建模工作。这项工作允许在不同的环境和操作条件下估算不同 WWTP 的 H2S 排放率。我们用于分析和描述嗅觉影响的最相关方面的方法学方法包括几次实验活动，这些活动涉及在几个 WWTP 附近使用被动采样器进行密集的现场测量，以及来自诊断性扩散模型的数值模拟结果。每个 WWTP 的气象塔提供了扩散代码的输入值，确保了平流分量的良好拟合，从而对环境条件下的模型化浓度场更有信心。然后，模拟和实验 H2S 浓度之间的比较得出了在几个 WWTP 在不同时间段内的这种物质的总排放量估计。所得结果显示出一定程度的时间和空间（厂间）可变性（可能是由于操作和环境条件造成的）。然而，更重要的是，结果显示出估计值的高度一致性，这些一致性始终保持在同一数量级。
