Departamento de Engenharia Ambiental, Universidade Federal do Espírito Santo, Vitória, Brazil.
Water Sci Technol. 2012;66(10):2223-8. doi: 10.2166/wst.2012.409.
Complaints from the Domingos Martins population about sewage odours in the city made the district attorney order an impact assessment of the odours emitted by the city wastewater treatment plant (WWTP). This study comprised various techniques, models and population surveys. In 2007, an odour emission model proved that the main hydrogen sulphide emitter was the aeration tank of the WWTP (13.5 g h(-1)) and such emissions, according to CALPUFF model, should be perceived in the whole Domingos Martins city centre area. In this area, 58% of those interviewed were annoyed by the WWTP odours. However, in 2009, the odour monitoring panel recorded few odour occurrences. A second population survey showed that hereafter only 20% of those interviewed were annoyed by the WWTP emissions. Odour emission and dispersion models run with 2010 data proved a drastic reduction of the WWTP aeration tank emissions and consequently the city centre was not bothered by WWTP emissions anymore. The odour emission reduction was due to the modification of the WWTP aeration tank system. Despite the odour emission reduction, houses located southeast of the WWTP were still annoyed by sewage odours. However, in this part of the town, other sources of sewage odours have been found.
多明戈斯·马丁斯市的居民抱怨城市污水的恶臭，地方检察官下令对城市污水处理厂（WWTP）排放的恶臭进行影响评估。这项研究包括各种技术、模型和人口调查。2007 年，恶臭排放模型证明，WWTP 的曝气池是主要的硫化氢排放源（13.5g/h），根据 CALPUFF 模型，这些排放物应在多明戈斯·马丁斯市中心区域被感知到。在该区域，58%的受访者对 WWTP 的恶臭感到不满。然而，2009 年，恶臭监测小组记录到恶臭发生的次数较少。第二次人口调查显示，此后只有 20%的受访者对 WWTP 的排放感到不满。根据 2010 年的数据运行的恶臭排放和扩散模型证明，WWTP 曝气池的排放量大大减少，因此市中心不再受到 WWTP 排放物的困扰。恶臭排放的减少是由于 WWTP 曝气池系统的修改。尽管恶臭排放减少了，但 WWTP 东南方向的房屋仍受到污水恶臭的困扰。然而，在该镇的这一部分，发现了其他污水恶臭的来源。
