When the landfill works to the design elevation or the landfill stops using because it no longer accepts garbage, it needs to be closed. The landfill closure project includes surface water runoff control, drainage, seepage prevention, leachate collection and treatment, landfill gas collection and treatment, pile stability, vegetation type selection and coverage, etc. Specific requirements shall be implemented in accordance with the Technical Specification for Closure of Domestic Waste Sanitary Landfills (CJJ 1 12-2007).

After the completion and acceptance of the landfill closure project, it is generally necessary to regularly check the maintenance facilities, track and monitor the groundwater, leachate, landfill gas, atmosphere, landfill settlement and noise, and maintain the normal operation of leachate collection and treatment and landfill gas collection and treatment. Landfills are prohibited from being used as construction land for permanent buildings before being appraised by professional and technical departments.

After the landfill is closed, it usually needs supervision and maintenance 10 years or more. Closed landfills are generally used as park green spaces, including golf courses and sports fields. [