The picture depicts the process of converting organic wast to fertiliser.
Overall, the process goes through 5 steps, starting at preparing a standard plastic container and concluding with using it for farming work.
At the first stage of the process, plastic container with 2m3 volume has prepared. After that, two side of the can, pierce some vents for free air flow. Then, waste is shredded into small pieces and added into the container with food at the bottom layer, grass and newspaper, respectively. Each layers should be approximately 15 centimeter in thickness.
At the following stage, two substances include nitrogen and hot water have added to begin decomposition process. The heat from hot water makes chemical reaction, breaks down organic matter and then the gas is escaped from 4 vents, which is punctured in the previous stage. Finally, after 6 month, the waste is turned into fertiliser and the farmers can use for gardening.