After receiving complaints from residents, there is a strong smell and smell around a community. Residents suspect that the industrial park on the east side of the community floated over, which has seriously affected the daily life of the residents of the community. After receiving the complaint, the environmental protection law enforcement personnel dispatched urgently and adopted an atmospheric movement monitoring system to conduct odor investigation on the industrial area around the community. Considering that there are industrial parks and civil construction projects around the community, and there are many small factories and complex types, it is decided to use drones for aerial inspection.
Quick detection: After preliminary survey of the surrounding environment, the drone carried a ” sniffing ” atmospheric detection device and launched a low-altitude scan of atmospheric pollutants over the industrial park on the east side of the community, mainly testing VOCs (volatile organic compounds) in the atmosphere , SO2 and PM2.5 pollutant data. In the one-hour and twenty-minute inspection time, a total detection area of 134,000 square meters.
Data visualization, quickly lock the pollution source: With Sniffer 4D Mapper data real-time visualization and analysis software, quickly lock the pollution source, and master the pollutant concentration data, quickly provide clues for environmental law enforcement:
During the investigation, when the drone flew over a factory building, the software showed that the concentration of VOCs rose sharply, and the maximum value of the color block concentration reached 35ppm (the background VOCs concentration in the industrial area was less than 0.1ppm ), and the area near the location PM2. 5 The value is also significantly higher, with the highest single point concentration reaching 196.0ug / m3 .
Testing equipment: atmospheric monitoring equipment + UAV + visual analysis software
Detection target gas: VOCs
Working time: 1 hour 20 minutes
Working range: 134,000 square meters
Test result: the highest value of the color patch density is 35.0ppm , the background density is less than 0.1ppm
The factory steals the holes and has nothing to hide: the pilot controls the drone close to the camera and finds that this location is a factory building with a row of ventilation holes on the top of the factory. On-site law enforcement personnel speculated that there were a large number of unorganized VOCs inside the plant , which were directly discharged into the air through the ventilation holes on the top of the plant (red marked parts below), suspected to be the source of odor in the surrounding communities. After on-site verification, the law enforcement personnel discovered and investigated and punished this unorganized factory emitting organic waste gas on the spot.
The picture shows the photo taken by the drone at the abnormal position of VOCs , the position of the red circle is the source of unorganized exhaust emissions