The diagram outlines the procedure involved in constructing a modern landfill designed for domestic waste disposal, including its final closure.
From a general perspective, there are three main stages depicted, involving the construction of a man-made hole in natural rock, followed by the utilization of the landfill in containing waste disposal, and eventual sealing. The design includes drainage systems and allows for the controlled release of gases during the last phase.
Looking at the first stage, a man-made hole is dug into a natural rock formation. This hole is then lined with a layer of clay, followed by a synthetic material to prevent leakage impermeably. Additionally, a drainage system is installed at the bottom, consisting of drainage pipes linked to a tank that collects liquid waste.
Once constructed, the landfill will be utilized to store household waste. Rubbish is transported by trucks and then deposited into the hole. As waste accumulates, liquid waste drains through the pipes and collects in the underground tank, while the solid waste remains inside the cavity.
In the last stage, the landfill is closed. A layer of clay is placed over the waste to seal it off, and a vertical pipe is installed to release gases generated during the decomposition process. This setup ensures that the site is safely isolated while allowing for the controlled emission of gases.