Explore The Main Difficulties of Domestic Waste Sorting

With the rapid development of urban construction. The increasing generation of municipal solid waste will pollute soil, water and air, and bring a series of problems to urban environmental protection. How to properly dispose of municipal solid waste has become an urgent problem for governments at all levels.
 
At present, domestic waste is generally disposed of in three ways: sanitary landfill, incineration for power generation, and composting.
Sanitary landfill is a simple and low-cost domestic waste treatment method. The investment is generally tens of millions of yuan. cause secondary pollution.
Incineration power generation is an effective treatment method for reducing and recycling domestic waste, and it is also a simple method for large and medium-sized cities to dispose of domestic waste. The investment is generally hundreds of millions of yuan. Its disadvantages are high operating costs: residue and fly ash treatment costs are high; organic matter with high calorific value and inorganic combustion without calorific value: the electricity price obtained by general incineration power plants does not meet the operating cost, but it is also easy to cause secondary pollution.
Composting technology is suitable for dealing with degradable waste collected by category. Most cities in my country have not yet met the conditions for classified collection and mechanical classification of domestic waste. Generally speaking, mixed garbage is piled directly. Although the harmful substances in composting products exceed the standard, the application is limited.
To sum up, the above three treatment methods, no matter in terms of household waste reduction, harmless treatment, or resource efficiency, are not good treatment methods for household waste, and the investment scale and operating costs have exceeded China The financial payment capacity of small and medium-sized cities. After repeated research on the history and current situation of household waste treatment, in order to achieve household waste reduction, harmlessness and resources, we must overcome the difficulties of mechanical sorting of domestic waste, develop household waste sorting equipment, and realize the resource utilization of household waste treatment.
Comprehensive research and development experience and lessons, found that the development of household waste sorting equipment must overcome the following technical difficulties:
① The characteristics identification of domestic waste is matched with the sorting technology.
② The separation of harmful substances (heavy metals, glass slag, etc.) in domestic waste meets the standards.
③ Domestic waste sorting equipment integration technology.
④ Overcome and control the secondary pollution in the process of domestic waste disposal.
 
In order to overcome the problems in the development of household waste sorting equipment, our company's New York staff conducted in-depth research on various technical difficulties. First, analyze the characteristics of domestic waste, clarify the principles of classification, and master the composition rules, then analyze the non-basic characteristics of domestic waste, locate the individual accidental phenomena and water content of domestic waste, and grasp the law of changing costs, and the third is to use various technologies to integrate , to classify the harmful substances in domestic waste, so that the selected products meet international standards and can be widely used. Fourth, under the technical conditions of selecting domestic waste or a single component, focus on the integration technology of equipment. Fifth, use domestic waste The secondary pollution factors in the classification process are the main points of the research. Therefore, the equipment developed should not only realize the recycling of domestic waste, but also the investment and operating costs of its products should conform to the national conditions of our country. The technical requirements for mechanical classification or single component of domestic waste classification are proposed, and the simplicity and harmlessness of domestic waste classification are realized.