At present, the construction of "no-waste cities" is steadily advancing in various cities, and the industry has been moved by the wind. Not only environmental protection enterprises such as solid waste treatment and utilization have been deployed, but many "crossovers" have also begun to seek various forms of cooperation. Look for breakthroughs in facilities construction, operation management, and intelligent hardware.

"Waste-free city" is an urban management and governance model with the goal of reducing the amount of solid waste, recycling it, and making it harmless. In the long run, we hope that it will become a model of urban green development, a new economic system and social development model, which will fundamentally solve the bottleneck of natural resources and the occupation of scarce land resources by waste disposal. Whether it is from the improvement of standardization and standardization, or the expansion of market scale, the construction of "no waste city" is a favorable policy for the industry and enterprises, and the solid waste treatment market will be cultivated in many aspects. Solid waste can be roughly divided into three categories: domestic waste, general industrial solid waste and hazardous waste. In addition, there are agricultural solid waste, construction waste and spoil.

Causes of solid waste:

(1) Industrial solid waste: Industrial solid waste is produced in the process of industrial production and processing, and is discharged into the environment of various waste residues, sludge, dust, etc. If industrial solid waste is not safely handled and disposed of in strict accordance with the requirements of environmental protection standards, it will cause serious pollution to land resources and water resources.

(2) Hazardous solid waste: Hazardous solid waste specifically refers to hazardous waste, which is flammable, corrosive, reactive, infectious, toxic, radioactive, etc., and produced in various production enterprises with hazardous waste products. Correspondent: Qiu Yubin, from the characteristics of hazardous waste, it has potential huge harm to human health and environmental protection. Causes or contributes to increased mortality, or increased morbidity of serious disease, or, when not managed properly, can cause significant acuteness to human health or the environment. Immediate, or potentially harmful, etc.

Such as sludge, medical waste, domestic waste, aviation waste, laboratory waste, etc., all belong to solid waste.

Solid waste hazards:

(1) Polluted water body: the way to enter the water body: garbage and waste residue enter the ground water body with rainwater runoff; seepage water in the garbage and waste residue enters the groundwater body through the soil; In surface water bodies, some cities dump garbage and waste directly into lakes, rivers or oceans, causing more serious pollution and a threat to human health.

(2) Polluted atmosphere: Entry route: some organic matter produces stench during the process of microbial decomposition; fine-grained waste, harmful gases and dust generated in the process of transportation and disposal of waste residue can be scattered with the wind; industrial waste coal gangue When the sulfur content reaches 1.5%, it will spontaneously ignite, and if it reaches more than 3%, it will ignite and release a large amount of sulfur dioxide.

(3) Land occupation: When solid waste is not used, it needs to occupy land for stacking. The larger the accumulation, the more space it occupies. It is estimated that for every 10,000 tons of waste accumulated, it takes about 1 mu of land.

(4) Contaminated soil: Toxic chemicals in industrial waste residue and sludge, pathogenic bacteria in hospital and slaughterhouse mine waste are brought into the soil due to the stacking of waste, causing the soil to be polluted; ), which not only reduces soil fertility, but also enriches the crops with toxic substances, which then affect people's health through food.

(5) Transmission of diseases: Many solid wastes and garbage contain toxic and harmful substances and pathogens, which are transmitted not only through the medium of water and gas, but also through living things.

Treatment of solid waste:

1. Waste recycling: including classified collection, sorting and recycling.

2. Waste conversion and utilization: that is, through certain technologies, certain components in waste are used to produce new forms of substances. For example, the microbial decomposition of garbage can be used to produce compostable organic matter to produce fertilizer; the cracking of engraved plastic is used to produce gasoline or diesel.

3. Waste-to-energy: that is, through chemical or biological conversion, the energy contained in waste is released and recycled. Such as waste incineration power generation or landfill gas power generation.

As the national environmental protection law enforcement becomes more and more severe, the three-waste enterprises are paid close attention to, and many enterprises have been punished. All localities have carried out joint law enforcement actions against illegal disposal of solid waste, in order to regulate urban and rural domestic waste, construction waste (including construction waste) Disposal and management of solid waste such as dregs, residual sludge), industrial solid waste, etc., to effectively safeguard the safety of the ecological environment and the environmental rights and interests of the public Solid waste behavior joint law enforcement special concentrated action. Relevant departments and towns (streets) will set up cards for on-duty inspections in areas with high incidence of random dumping, and severely crack down on illegal disposal of solid waste.