A sharp weapon for the harmless treatment of urban comprehensive garbage-full utilization of garbage, you can have it
After secondary fermentation, the garbage is made into organic fertilizer. The picture shows workers bagging and sealing organic fertilizers on the production line. Photo by Xu Yuezhi
A few days ago, the "Urban Comprehensive Garbage Harmless and Resource-based Treatment System" was officially put into operation in Linyi County, Shanxi Province. The system’s harmless and resource-based treatment of comprehensive garbage can not only turn urban garbage into treasure, but also become new available resources, and at the same time, it will not cause adverse effects on the urban environment.
At the scene of Linyi County Urban Comprehensive Garbage Harmless and Resource-based Treatment Center, the reporter saw that this fully automatic numerical control system with a daily garbage treatment capacity of 300 tons is easy to operate and highly automated.
According to reports, the system can sort garbage without waste water, waste gas and waste residue, and the sorting rate can reach more than 99.5%. After that, the sorted garbage can be turned into reusable resources, and the resource utilization rate can reach more than 96%.
"After the garbage enters the factory and is crushed, it is sent to the fermentation bin, and the super biological bacteria are sprayed in the fermentation bin for anaerobic fermentation. During the fermentation process, the garbage produces biogas. After desulfurization, dehydration, dust removal and pressure stabilization, the biogas meets the requirements of biogas generator set for biogas flow and quality, and then the biogas is delivered to the generator set for power generation." The staff of the center told the reporter, "The garbage after secondary fermentation is rich in a large number of nutrients needed for crop growth. The nutrient soil obtained after sorting and the biogas residue produced by anaerobic digestion of garbage percolate can be ground and granulated after adding appropriate nutrients. Organic fertilizer can be produced, which meets the relevant requirements of national agricultural fertilizer production standards and is used for landscaping."
The comprehensive separator is the core equipment of the system. According to the characteristics of garbage, it can screen garbage into several categories, including organic soil, organic fertilizer, waste plastics, construction garbage, waste metal, etc., by using technologies such as wind power, gravity, magnetism, shape and speed, combined with technological processes such as mechanical selection, wind separation, magnetic separation, screening, automatic shearing and crushing.
"Garbage is a misplaced resource, and how much garbage is produced when how many resources are consumed." Yuan Li, chairman of Jiangsu Xuefeng Environmental Protection Technology Co., Ltd. believes that, in turn, how much garbage should be transformed into how many resources.
It is understood that this set of urban comprehensive garbage harmless and resource-based treatment system has invested a total of 130 million yuan, and the annual economic benefit is nearly 40 million yuan. Tested by relevant departments, the comprehensive garbage disposal center in Linyi, Shanxi Province has reached the requirements of relevant national environmental protection technical specifications, and has become an example of systematic and market-oriented operation.
At present, there are three kinds of garbage disposal methods in the world: landfill, incineration for power generation and harmless and resource-based treatment. Among them, landfill not only occupies a lot of land resources, but also easily pollutes soil and groundwater resources, and can not produce economic benefits; Incineration power generation has a large investment and high operating cost. If it is not handled properly, the smoke will cause serious pollution to the atmospheric environment and be harmful to human body. Experts pointed out that the commissioning of the system has ended the history of landfill and incineration of urban comprehensive garbage. The harmless and resource-based treatment of comprehensive garbage can not only improve the urban environment and improve the quality of citizens’ living environment, but also realize the reuse of resources and save resources and energy. (Economic Daily-China Economic Net reporter Xu Yuezhi)