Sanitary landfill is considered as the best method in trash disposal that are often used by many countries currently. Beside its environmentally friendly, the gas that is produced by this method can also be used as an energy sources. However, comparing with other methods, this method is quite expensive and requires proper planning, design, and operation.
Similar as open dumping, in sanitary landfill, the solid trashes have also been gathered in one place. The difference lies in the process after that. If in the open dumping the trashes will be separated to be destroyed or recycled, in sanitary landfill the trash will be buried and compressed with heavy-earth-moving equipment, then covered by soil into several layers. The purpose why it is covered by soil into several layers is to prevent the dirty water of trash seeps and contaminate the groundwater. After a few years, the solid trashes which have been buried will be together with soil and become hard. Then, a new area can be open above it.
As the best method in trash disposal currently, it is expected for every country, especially development countries to use this method rather than open dumping that has many disadvantages.
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