The picture illustrates the design of a modern landfill for household waste. Overall, the process begins with digging a large man-made hole, followed by several steps, and finally at the stage called “closure”.
At the beginning of the period, workers will dig a circular or square-shaped hole that reaches nearly the natural rock. After that, they will dig a small length-shaped drainage tank at the bottom of the hole, and add several drainage pupes, which connect with the upper ground. In addition, they will add a clay layer surrounding the hole to make a synthetic substance, in summary.
The third steps called “use” stage which household waste will be put in the hole. At this stage, the waste can be divided to soid waste at the top and liquid waste at the bottom of the hole. Specifically, liquid waste can be contained in the length-shaped drainage tank which was made before. At the end of the process, a layer of clay will be added at the bottom of the hole to make a cap, and the gases will be collected by the drainage pupes for using purposes.
