Composting process is to make the organic matter in garbage undergo biochemical reaction under the action of microorganisms, and finally form a kind of decomposed substance.
2. Composting method
Composting process is to make the organic matter in garbage undergo biochemical reaction under the action of microorganisms, and finally form a substance similar to humus soil, which can be used as fertilizer or soil improvement.
3. Pyrolysis
Pyrolysis is a high-temperature thermal deCOmposition technology of organic matter under anaerobic or anoxic conditions, which uses thermal energy to break polymers physically and chemically, and converts large molecular weight organic matter into small molecular combustible gases (hydrogen, CH 4, co, etc. ), liquid fuels (methanol, acetone, tar, etc. ) and coke.
4, incineration method
Municipal solid waste incineration can achieve the purposes of heat energy recovery, volume reduction, weight reduction and high temperature sterilization, and has obvious advantages in environmental protection and resource utilization.
Extended data:
Ancient garbage disposal:
According to ancient books, as early as the pre-Qin period, the city was already quite large and the population began to be dense. At that time, the rulers made quite strict laws and regulations.
In order to deal with the garbage problem in the Tang Dynasty, the state promulgated corresponding laws and regulations, which were as strict as those in the pre-Qin period. According to "Discussion on Tang Law", people who litter in the street will be punished with 60 boards.
If law enforcers condone littering, they should also be punished together. In the Tang dynasty, there were people who took recycling garbage and treating feces as their profession, and some people made a fortune by it.
In the Song Dynasty, in order to manage the city's environmental sanitation, a special institution, Street Department, was established. There are full-time sanitation workers under the street department. According to Meng Lianglu's account, their duties include sweeping the streets, diverting stagnant water and rectifying the city.
In big cities like Kaifeng and Lin 'an, hundreds of sanitation workers clean streets and dispose of garbage every morning.
Reference source: Baidu Encyclopedia-Domestic Waste Disposal