Stale garbage is sent to the chain plate feeder by forklift, and then the required materials are evenly processed by the uniform feeder. Whether the garbage can be screened at a high rate, uniform feeding is crucial. The garbage is transported to the drum screen by the feeding conveyor. Before being transported to the drum screen, manual sorting should be set up, and large building inert materials such as stones in the garbage should be sorted.

The garbage with large objects removed is screened by the drum screen and divided into oversize and undersize. The undersize is mainly humus, mixed with impurities such as metals. The undersize is sorted and recycled by the magnetic separator for metal recovery, and the humus is treated as organic soil for landscaping.

The screened material is divided into heavy and light materials by the wind separator. The heavy materials are mainly recycled aggregates, mixed metals and a small amount of plastics and other impurities. The heavy materials are separated by manual separation, mixed plastics and other combustible materials, and then separated by magnetic separators, metals, and aggregates can be used in the building materials industry. Light materials are mainly plastics and other combustible materials, as well as large materials. Heavy materials are selected from combustible materials and packaged together into combustible compression packages, which are transported to power plants for incineration and power generation.

Stale garbage refers to the product of long-term natural evolution after landfill. After years of microbial decomposition and fermentation, it usually has a large amount of water and a very low organic content. If it is to be dug out and incinerated, it needs to be screened, and the separated combustibles are used for garbage incineration, and the rest are composted, landfilled, and leachate treated according to specific circumstances.