60 million tons a month, how does human excrement become clear water?Let's start with flushing

Have you ever thought about such a question: How much excrement do a person have to have? How much is the excrement of people in the country? How do so many excrements be treated?

Generally speaking, the amount of excretion of a person a day is more than 3 pounds. As of the end of 2021, the total population of China is about 1.4 billion, which means that every day the country will produce no less than 4.2 billion kg of excretion, 10 days for 10 days It is 42 billion kg, and a month is 126 billion kg, that is, 63 billion kg, that is, 63 million tons. This is really a rich number. It produces more than 60 million tons of excrement in a month. If such a huge amount of excretion is not properly treated, the consequences are unimaginable. Maybe you feel that this is not a big deal. Biological will be excreted. Isn't this the case for billions of years?

The excrement of creatures can be perfectly digested in nature because various creatures can maintain a reasonable number range.

And the number of humans is obviously too much. The number of humans can be unscrupulous to rely on the blessing of wisdom and modern technology. Therefore, it is necessary to digest a huge amount of human excretion. That's it. Before the 1980s, the treatment of excrement was relatively primitive, because most cities were still using dry toilets at that time. The aquacile toilet is a relatively simple toilet. It consists of two parts, a pit and a storage tank under the pit. This kind of dry toilet must rely on manually to clean up, not only consumes manpower, but more importantly it will bring a certain danger to people's health.

Because the primitive dry toilet treatment method can easily lead to the spread of excrement in the process of cleaning and transportation, which brings bacteria to everywhere, causing an epidemic disease.

However, all this has become history. Since the 1980s, my country has developed rapidly, and the sewage treatment system of the city has become more and more complete. Everything has become different. Turning to clear water. How did you do it? This will start with water flushing. When we excrete, we only need to press it lightly, and the toilet will bring our excrement into the septic tank downstairs. Generally speaking, a septic tank should be composed of at least three layers, namely: first -level anaerobic chamber and secondary anaerobic chamber first -level clarification room. In the anaerobic chamber, the dirt will be digested and hydrolyzed, the solid impurities will be descended, and liquid matter will enter the clarification room.

One of the main functions of the septic tank is to achieve solid solid solid solid.

The solid matter will be continuously accumulated in the septic tanks leftstairs, waiting for subsequent treatment, and the final result of the treatment is nothing more than two: it becomes fertilizer or directly landfills. The liquid material separated from the septic tank will directly flow into the sewage treatment plant through the pipeline, and the first job to be carried out by the sewage treatment plant is to separate the chemical composition in the sewage. The liquid that flows into the sewage treatment plant is not only our excrement, but also a variety of clean and washing agents we use daily. These are separate treatment. The method of separation is usually using active sludge rich in microorganisms. The microorganisms in these sludge will decompose the impurities in the water.

After the sewage treatment plant is treated, these water can be discharged into the water source, but before discharge, there is an important step. Standards can be discharged.

The bacteria contained in the water and various harmful substances contained in the test standards are relatively small, and naturally they are completely capable of further filtering and digesting them. Natural purification capabilities are very powerful. These emissions of these standard water will never affect the water quality of the water source. After the natural precipitation and purification, these emission water can soon become the water source for secondary use. After that, the water in the water source will be extracted by the water plant. After a series of purification and disinfection treatment, it will be re -become our living water.

Knowing this process, maybe you will feel a little awkward, but it's not a big deal.

In nature, the excrement of animals itself will enter the water source, and there are a lot of aquatic creatures in the water. If you have raised fish, you will know that if you do n’t open the filtering system for three days, the fish at the bottom of the tank can make your dense phobia attack, and the sewage that detects the standards is actually cleaner than the excreta of these animals. Moreover, after the natural purification, the tap water plant will also purify and disinfection again, so that it will completely become a recycled purpinwered water purification. When we wait for our house, these water has no traces of previous traces. It is because of the modern technology blessing that we can have such a comfortable living environment. For us, flushing is just gently pressing the button, but there is a strong urban circulation system behind this.

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