Stale garbage refers to remaining non-degradable garbage that has been in landfills for long periods of time and has not broken down. It is usually composed of plastics and metals.
Landfill waste treatment system primarily consists of equipment such as rotary screens, sorting devices, and magnetic separators. Upon arrival, the waste first passes through the rotary screen, which separates the material into coarse oversized fractions and finer undersized fractions. The undersized material is humus soil, while the oversized fraction undergoes air separation to divide it into heavy and light materials. The light fraction mainly consists of waste plastics, whereas the heavy fraction includes humus soil and construction debris. Iron metals are then removed from the humus soil and construction debris using magnetic separators.
The processed material from the landfill waste treatment system is classified into four main categories:
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