The provided picture illustrates the compositions and structures of a modern landfill to treat household waste. Overall, the whole process comprises three distinct stages, starting with construction, then the usage, and final closure.
The first step begins with the creation of the landfill hole. Specifically, it is a man-made hole that is excavated into the ground, then its base is flattened above the natural rock. In the second stage of construction, the landfill pit is covered with a thick layer of clay and a synthetic material to prevent the liquid from seeping into the surrounding soil. Additionally, a drainage system is installed at the bottom of the hole, which has multiple parallel pipes that can lead the contaminated water from the waste into a tank below.
Concerning the step of usage, the pit is filled with household waste. As the waste is decomposed, it releases a form of liquid that will be stored in the pre-created tank. After the hole exceeds its maximum capacity, it would be sealed with another layer of clay being put on top to prevent the release of odors. Another pipe system is introduced that would lead the biogases-released from the decomposition of the waste material inside the landfill- into a designated area.