Department of Occupational Health and Safety Engineering, Research Center for Environmental Pollutants, Faculty of Health, Qom University of Medical Science, Qom, Iran.
Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
Int J Occup Saf Ergon. 2023 Mar;29(1):335-346. doi: 10.1080/10803548.2022.2041846. Epub 2022 Mar 11.
Biogas production in treatment plants for energy generation has increased in recent years. This study aimed to model the consequence of biogas release in a large urban treatment plant. . The study modeled biogas storage tank consequences in a large urban treatment plant in Iran. Due to potential for biogas harmfulness, three consequences of toxic release, fire and explosion were evaluated. Scenarios were evaluated in the worst-case situation. All modeling steps were performed using PHAST version 7.2. In the case of catastrophic reservoir rupture in summer, distances of 3788.94, 128.86 and 91.72 m from the reservoir in the wind direction will be in the range of 100, 500 and 1000 ppm biogas, respectively. Study of pressure values due to explosion in the catastrophic rupture scenario revealed that distances of 57.19, 14.70 and 115.84 m from the biogas reservoir were in the range of 0.02, 0.13 and 0.2 bar pressure increase, respectively. Due to the treatment plant's location in a dense urban area, biogas dispersion could lead to exposure of many people to high-risk areas. Therefore, taking control measures comparable with the consequence modeling output can be a practical step toward reducing vulnerability against such incidents.
近年来，用于发电的处理厂中的沼气产量有所增加。本研究旨在模拟大型城市处理厂中沼气释放的后果。该研究对伊朗一个大型城市处理厂中的沼气储存罐后果进行了建模。由于沼气具有潜在的危害性，因此评估了有毒物质释放、火灾和爆炸三种后果。评估了最坏情况下的情景。所有建模步骤均使用 PHAST 版本 7.2 进行。在夏季水库发生灾难性破裂的情况下，风向方向距离水库 3788.94、128.86 和 91.72 米处将分别处于 100、500 和 1000 ppm 沼气的范围内。对灾难性破裂情景下爆炸引起的压力值进行研究表明，距离沼气库 57.19、14.70 和 115.84 米处的压力将分别增加 0.02、0.13 和 0.2 巴。由于处理厂位于人口密集的城区，沼气扩散可能导致许多人暴露在高风险区域。因此，采取与后果建模输出相当的控制措施可以是降低此类事件脆弱性的实际步骤。
