How is the municipal solid waste disposed of now?

Incineration, of course, is the high-temperature aerobic calcination of organic waste into inert gaseous substances and inorganic non-combustibles. The heat burned can be used to generate electricity. The flue gas is purified and discharged, and the remaining residue can be landfilled or used for other purposes.

The more common is landfilling, which is to compress the treated garbage and transport it to a designated landfill for deep burial, and then backfill the soil to allow microorganisms to consume and decompose the garbage over time. This method is generally suitable for ordinary household garbage, such as vegetable leaves, leftovers and other decomposable garbage. Landfills are a scarce resource because they need to be kept away from water sources, growing areas, residential areas, and so on.

The composting method is to use the microorganisms in the garbage to make the organic components undergo a chemical reaction to produce the effect of fertilizer and improve the soil. In rural areas, composting is mostly used to dispose of garbage. Waste is treated with sludge or composted with waste and manure can reduce environmental pollution and improve fertilizer efficiency.

Centralized treatment, some places are landfilled, some places are incinerated for power generation, and some of them can be used by waste pickers.

Bury, pull to the designated place, and bury it uniformly. Incineration, pulled to a uniform site, burned, but in recent years this method has been banned by the majority. Piled up, pulled to the designated place, piled up and put away, no one cared.

Waste utilization, separating reusable ones, processing them for secondary use. At present, the most used is burial.

There is a special garbage incineration plant, which can process a very large amount in a day. Later, it was discovered that such incineration was also a usable resource, and a plant was developed in Germany to generate electricity using the energy used by waste incineration. Now it is nothing new in the country either.

Household waste is varied. There are many renewable resources (metals, plastics, paper, etc.), but there are also many sources of pollution (batteries, etc.). For final disposal, the garbage is sorted at the garbage dump.

Once sorted, the garbage is incinerated.

There are three types of landfill methods: sanitary landfill, compressed landfill, and crushed landfill. Landfills are strictly forbidden to contain toxic and harmful components, which will cause secondary pollution. The moisture content of the landfill is less than 20% to 30%, the inorganic component is more than 60%, and the density is greater than 0

5t/m3。Coal mine subsidence areas and abandoned mine shafts can be used as landfills.

The sanitation department will have garbage removal trucks to place garbage at various points on a regular basis, and some cities have garbage transfer stations, and the garbage removal vehicles will transport the garbage back to the transfer station and then transport it away.

Our domestic garbage was taken away by sanitation trucks and transported to a garbage collection site outside the city. The garbage dump is very large, and it is systematically disposed of.

We have high-tech processing here, burying the exposed garbage with soil, and the surface is not visible.

Municipal waste disposal consists of three processes:

collection and conveying;

Pretreatment; Final Processing.

Pretreatment refers to compression, crushing, and sorting processes for shipment or to accommodate certain final disposal requirements. The unusable part of the waste must be finally disposed of, which is the focus of comprehensive treatment and development applications.

Here's how:

Landfill. There are three methods: sanitary landfill, compressed landfill, and crushing landfill.

Incinerate. It has the effect of reduction, harmlessness, and can be used for thermal energy. In recent years, on this basis, high temperature and medium temperature decomposition methods have been developed. The high-temperature method (1650 1800) is the most effective way to reduce the volume of waste.

Biotransformation. Usually the composting method is used to convert organic matter into fertilizer, which is economical, simple and practical, and is an important method of garbage disposal. However, some organic components in the garbage that are difficult to degrade or cannot be degraded limit the application of this method.

If there is sludge from the sewage treatment plant in the garbage, use it as fertilizer for the farmland. Combining waste incineration with energy development and utilization is an important development direction at present.

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1. Composting method.

The composting process is to make the organic matter in the garbage, under the action of microorganisms, undergo a biochemical reaction, and finally form a similar rot.

2. Composting method.

The composting process is to make the organic matter in the garbage, under the action of microorganisms, carry out biochemical reactions, and finally form a substance similar to humus soil, which can be used as fertilizer or soil improvement.

3. Pyrolysis method.

Pyrolysis is a high-temperature pyrolysis technology of organic matter under anaerobic or anoxic conditions, which uses heat energy to break the polymer compound, and converts large molecular weight organic matter into small molecule combustible gas (hydrogen, CH4, CO, etc.), liquid fuel (methanol, acetone, tar, etc.) and coke.

4. Incineration method.

Municipal waste incineration can achieve heat energy return to the harvest, volume reduction, weight reduction, high temperature sterilization and other burial purposes, which has obvious advantages in environmental protection and resource utilization.

Hygienic landfill method: the garbage is compacted and filled in a certain space, and the purpose of storing garbage is gradually achieved by covering it. Composting Treatment:

Under the action of microorganisms, the organic matter in the waste undergoes a series of biochemical reactions to gradually form a substance similar to humus soil, which can be used as fertilizer or improved soil. Incineration treatment: The main characteristics of this treatment method are good capacity reduction, relatively high degree of resource utilization and relatively large treatment capacity.

1. Sanitary landfill method: the garbage is compacted and filled in a certain space, and the purpose of storing garbage is gradually achieved by covering it.

2. Composting treatment: Under the action of microorganisms, the organic matter in the waste gradually forms a substance similar to humus soil after a series of biochemical reactions, which can be used as fertilizer or improved soil.

3. Incineration treatment: The main characteristics of this treatment method are good capacity reduction, relatively high degree of resource utilization and relatively large treatment capacity.