How Does a Modern Landfill Work

In many people’s minds, landfills are dirty and smelly, sewage is flowing, and flies are flying around. In fact, this is a false impression. A true sanitary landfill has a set of strict standards, starting with garbage entering the site. From landfill to comprehensive use, every process is not simple.

There are more than 400 million urban residents in my country, and more than 150 million tons of live waste are generated. At present, the most used treatment methods are composting, incineration, and landfilling. The first two methods are used in my country, but they pollute the environment very; there are also many cities and towns in my country that use landfill methods to dispose of domestic waste, but due to the limitations of funds and technical means, most landfills only Simple landfill treatment does not have the necessary environmental protection facilities, so it still has a very bad impact on the environment. With the increasing awareness of human environmental protection, the call for the construction of sanitary landfills for domestic waste is also increasing. Modern sanitary landfills for domestic waste include composite liner systems, leachate collection and treatment systems, gas collection systems and capping systems, etc., which can isolate the garbage body and the surrounding environment and make it affect the environment. drop to lowest.

1.Domestic garbage that cannot be recycled or recycled when the garbage enters the site will be transported to the landfill by garbage trucks and weighed by the computer after inspection.

2.Landfill construction

Before this, the construction of the landfill should be prepared in advance. From the site selection of the landfill to the industrial design, it was decided after careful consideration. The base and surrounding areas of the landfill area will be reinforced with an impermeable clay layer, and an impermeable film will be laid to prevent the waste from leaking. This impermeable membrane is very strong and will not be damaged for decades, so there is no need to worry about the pollution of soil and groundwater by garbage.

3. Flattening and rolling of garbage

After the garbage is poured into the landfill pit, the density of the garbage will increase after repeated flattening and compaction. The leachate produced by the garbage will be introduced through the pipeline to a special place for treatment.

4. Complete the closure

After each landfill unit is completely filled, we will completely cover it with a soil layer, plant trees to integrate it with the surrounding environment and check the impact of the landfill area on the environment for a long time.

5. Landfill gas collection

In the sealed landfill area, because the oxygen-deficient organic waste begins to ferment, a large amount of mixed gas (methane, carbon dioxide, nitrogen, etc.) is produced. These gases are transported to the power plant through vertical gas wells and horizontal gas wells crisscrossing the trash layer.

6. Landfill gas power generation.

After the gas is purified, it is supplied to the internal combustion engine through combustion. Part of the power generated by the internal combustion engine is used for its own use in the factory area, and the other part is transmitted to the national power grid. The waste heat generated by the combustion can also be transferred to the nearby district heating network or industrial and agricultural equipment by the heat exchanger.

So far, is the entire operation process of the waste sanitary landfill.

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