Application of TAPM-AERMOD model system to assess pollution spread and propose odor control solutions at Dap Da landfill, Dong Thap province

Tóm tắt

Domestic solid waste landfills are sources of unpleasant odors that affect the lives of residents living nearby. It can be said that odor pollution is considered a pollution problem that has caused much concern for people living around landfills in recent times in Vietnam in general and also in Dong Thap province. This study was conducted to assess the status of odor pollution and apply the TAPM-AERMOD model system to simulate the spread of odor pollution at the Dap Da landfill, thereby proposed solutions to reduce odor pollution, contributed to protect the air environment around the landfill. The study calculated the emission load of NH₃, H₂S, and CH₃SH from the Dap Da landfill based on the emission factors method. The results of the odor spread simulation showed that the highest average 1-hour concentration of NH₃ was 1000 µg/m³, in range of 200-500 µg/m³ with the farthest spread distance of 2 km and mainly in the Northwest direction; the highest average 1-hour concentration of H₂S was 165 µg/m³, in range of 42-80 µg/m³ with the longest spread distance of 2.1 km and mainly in the Northeast direction; the highest average 1-hour concentration of CH₃SH was 71.8 µg/m³, in range of 50-70 µg/m³ with the longest spread distance of 623 m and mainly in the Northeast direction. The study built 2 scenarios in the future when expand the landfill to 2050, showed that the pollutant concentration increased by 1.5-2.0 times, the spread distance increased by 1.3-1.5 times (in scenario 1) and 3.2-4.0 times (in scenario 2) to the current situation. In addition, the study proposed solutions to reduce odor pollution from the Dap Da landfill.