The given diagram illustrates the phases involved in producing compost, a type of garden fertilizer, by recycling organic waste.
Overall, there are five major steps, beginning with preparing a plastic container and ending with compost ready to be used in the garden. The process takes around six months and requires materials such as nitrogen and hot water.
In the early stage, a container made of plastic with a volume of two cubic meters is used, and several holes are poked on the sides to allow air to flow through. Then, three layers of waste materials are added inside the container. The first layer is food waste with a thickness of 15 cm, followed by another 15 cm of grass, and finally, newspaper scraps are placed on top.
In the next step, nitrogen and hot water are poured into the container, and then the container is sealed. The heat generated during this phase escapes through air circulation.
After a period of six months, the process is complete and compost is formed at the bottom of the container. This compost can be used as natural fertilizer in the garden.