1. Composting method
The composting process consists of subjecting the organic matter contained in the waste to biochemical reactions under the action of microorganisms, and finally forming a substance similar to compost.
2. Composting method
The composting process consists of subjecting the organic matter contained in the waste to biochemical reactions under the action of microorganisms, and finally forming a substance similar to soil humus , which is used as fertilizer or to improve the soil.
3. Pyrolysis method
The pyrolysis method is a technology of high temperature heating and decomposition of organic matter under anaerobic or anoxic conditions. It uses thermal energy to combine and break down high molecular weight organic materials. matter. Process of conversion into small molecules of combustible gases (hydrogen, CH 4, CO, etc.), fuels liquids (methanol, acetone, tar, etc.) and coke.
4. Incineration method
Urban waste incineration can achieve the goals of thermal energy recovery, volume reduction, weight loss, high temperature sterilization, etc., and has advantages obvious environmental benefits. protection and use of resources.
Detailed information:
Waste disposal in ancient times:
According to classical records, as early as the pre-Qin period , the city was already quite large. The population began to become denser and the leaders of the time enacted fairly strict laws.
In order to solve the waste problem in the Tang Dynasty, the state issued corresponding regulations, which were no less strict than those in the pre-Qin Dynasty. According to "Tang Lv Shu Yi", people who throw waste in the streets will be punished with sixty bansictions.
If law enforcement officers tolerate citizens' littering behavior, they will also be punished. During the Tang Dynasty, there were also people who took up garbage recycling and excrement processing as a profession, and some people became rich through it.
During the Song Dynasty, to manage the city's environmental sanitation, a special agency was established: the Street Department. There are full-time sanitation workers within the Streets Department. According to “Meng Liang Lu,” their tasks include sweeping the streets, diverting stagnant water, and cleaning up the appearance of the city.
In big cities like Kaifeng and Lin'an, hundreds of sanitation workers clean the streets and remove waste every morning.
Reference source: Baidu Encyclopedia-Domestic Waste Disposal