รายละเอียดตัวอย่าง

The diagram illustrates how a modern landfill for domestic garbage is constructed and utilized and ultimately closed. Overall, the process comprises three main stages. First, a large hole is dug, domestic waste is then deposited inside. Finally, the hole is sealed, and the gases are released through a separate pipe. During construction, a deep man-made hole is excavated in an area of natural rock. The interior of the pit is covered first with a layer of clay and then with a synthetic lining, which prevents waste liquid from entering the surrounding area. A series of drainage pipes is installed along the bottom and connected to a drainage tank. When the landfill is used, the trucks deposit household waste into the prepared hole. As the waste accumulates, liquid produced inside flows downwards and enters the drainage pipes. It is then carried into the tank at the base of the landfill. In the final stage, the filled landfill is covered with a thick layer of clay. A vertical pipe is also installed through the waste so that emitted gases can escape safely after the site has been closed.