1. The initial phase-out stage: the domestic waste treatment project is to recover and recycle domestic waste. The most effective way is to implement classified collection of domestic waste. This is a consensus formed in the practice of developed countries. Sorting is a method of garbage disposal, and its purpose is to separate materials that can be recycled or are not conducive to the subsequent processing and disposal process requirements in the garbage. Due to the complexity of municipal solid waste, sorting is one of the most important operations in the resource utilization of waste. Mainly include: screening, gravity sorting, wind sorting, magnetic sorting, electric sorting, flotation, etc.

2. Biological treatment system: mainly includes aerobic composting and anaerobic digestion. Composting refers to the biochemical process of using microorganisms that are widely present in nature to promote the conversion of biodegradable organic matter into stable humus through artificial adjustment and control. Anaerobic digestion is the use of anaerobic microorganisms that grow in sewage, sludge and garbage under anaerobic or anaerobic conditions to hydrolyze and liquefy organic matter such as carbohydrates, fats, and proteins under anaerobic conditions. It is gasified and decomposed into stable substances, and at the same time it kills germs, parasite eggs, etc., to achieve the biochemical sequence reaction process of garbage "three transformations".

3. Waste composite material is a new type of material made of two or more solid wastes as raw materials, and a composite material made entirely of solid wastes as raw materials. This type of composite material includes many varieties. According to the different properties of the matrix, it can be classified into three types: polymer-based, silicate-based, and metal-based. The cost is much lower than the disposable resources obtained through mining, selection and smelting. It not only solves the environmental pollution problem caused by solid waste, but also saves various precious disposable resources. It has obvious environmental, social and economic benefits. The three benefits are rare materials with environmental coordination.