Ammonia Dispersion Using Experimental and Modeling Methods

作者：Asadi Mohsen^*; Asadollahdardi Gholamreza; Mirmohammadi Mohsen

来源：Environmental Engineering Science, 2014, 31(12): 643-652.

DOI：10.1089/ees.2014.0051

• landfilling
• atmospheric chemistry and air quality
• solid-waste management
• emissions
• composting
• biological treatment processes
• ambient air quality

Ammonia is a toxic, corrosive, chemically active gas and odorous compound that is frequently found in landfills and composting facilities. We studied ammonia emission rates and the downwind concentrations of Kahrizak landfill and composting plants, located in the south of Tehran. First, we carried out the field measurements in the autumn (temperature of 24 degrees C) and winter (temperature of 4 degrees C) and analyzed the collected samples using indophenol method. Comparison of the monitored ammonia in each station indicated that the closer stations to the sources were more sensitive to the changes of temperature. We predicted the ammonia emission rate using the attained results of field measurement, environmental features of the study area, and backward Lagrangian stochastic technique. Areas integrated with ammonia emission from the composting plants and landfill in the autumn were 134.80 and 96.73 g/s, respectively. Values in the winter reached 96.73 and 86.05 g/s. Downwind ammonia concentration was detected about 1,800 m from Kahrizak complex using SCREEN3 model. Due to field measurements, predicted results of SCREEN3 model were more reliable for distances more than 450 m of sources and the correlation determination between the actual and predicted data was 0.85. Result of this study may be useful for site selection of landfill and composting. In addition, our result may help urban decision makers determine the distance between boundaries of urban development and existing landfill and composting sites.

• 出版日期2014-12-1