Do you think the pool water is clean? Why is the water in the pool so clean?

It's clean. The basic swimming pool is changed every day, and it will be sterilized and disinfected to protect the health of swimmers, after all, the water is not clean and easy to get sick.

It's not clean, so many people take a shower together, it feels hard to be clean.

The water in the pool is not clean, there are a lot of bacteria, and it should be disinfected every day, because the pool is also a public place, anyone can swim, so there are a lot of bacteria, and you must take a bath after swimming, I swim in the pool all year round so it is very clear.

The water of the swimming pool is not clean, according to the survey, the water of the general swimming pool contains 40% of urea, it can be seen that the degree of hygiene is low, if your physical condition is not very good, it is best not to go, bacteria are most likely to invade.

Although the water in the swimming pool is disinfected, it will be polluted because of the large number of swimmers, and the water in rivers and lakes is even worse, and there are often many bacteria.

It's not clean at all! Maybe there are kids peeing! Every time, someone spat in the water. Anyone who should have swam knows it. So it's too unclean, unless they disinfect it.

At present, major swimming pools are generally equipped with water treatment equipment or conventional drugs for water disinfection, filtration, and clarification. However, there are also some swimming pools whose water quality is not up to standard, so it will not be suitable for swimming.

It's definitely not clean, so many people swim in it, just because of this, you have to drink a few sips of water to learn to swim, it's dirty, so I didn't learn to swim.

Generally, the pool with a good reputation and a better environment should have clean water, after all, there are standards and will be disinfected or something. The one that is almost the one may not be clean.

I think it's dirty, and maybe some regular and diligent swimming pools would be better, but to be honest, most people don't take a shower before going swimming, so you can imagine.

The swimming pool always feels clean because there are a lot of people, and I have heard that there are people peeing inside. And maybe someone has athlete's foot, it's terrible.

Clean fart! Thinking about it with your toes is not clean, and it makes you disgusting to think about it!

The water of the swimming pool is clean and clear all depends on the work of the swimming pool water treatment system, which mainly includes the steps of swimming pool filtration, disinfection, and constant temperature.

The filtration system of the swimming pool is the first line of defense to maintain the clear water quality of the swimming pool, and the filtration system is also divided into coarse filtration and fine filtration. Coarse filtration is the removal of particles, hair, fibers, and various physical impurities to reduce the turbidity of water. When the water passes through coarse filtration, it will enter the fine filtration process, which can remove the fine suspended solids in the water and some microorganisms trapped outside the filter layer to reduce the turbidity of the water.

The commonly used equipment for fine filtration is sand tank filtration, and different sizes of swimming pools require different specifications of sand tanks.

The disinfection system of the swimming pool, when the water is finely filtered, the water will pass through the sterilization and disinfection equipment to destroy all kinds of bacteria and viruses in the water, and finally the water will flow back into the pool. Common disinfection and sterilization equipment is ultraviolet sterilization sterilizer, copper and silver ion generator, Xingxun sullen ozone generator, chlorine-free filter disinfection machine, etc. Many managers of swimming pools will also use pesticides in combination with disinfection and sterilization equipment to make the disinfection and sterilization function more efficient.

The constant temperature system of the swimming pool, many people think that the constant temperature system of the swimming pool is dispensable, in fact, it is very important for the swimming pool to have a constant temperature system. In particular, indoor swimming pools do not have sunlight, and even in summer, the water temperature is lower than that of outdoor swimming pools, and the body is prone to hypothermia after being in the water for a long time. If you swim in the constant temperature water, you don't have to worry about hypothermia, the constant temperature system can also improve the frequency of use of the swimming pool, if it is a commercial swimming pool, the constant temperature curved temperature swimming pool can be open all year round.

Now the common swimming pool thermostatic equipment is the air source heat pump unit, which is more efficient, energy-saving and safer for heating.

According to the "Hygienic Code for Swimming Places" and other relevant regulations, swimming pools must be replaced with new water every day, and the replacement rate is usually between 5% and 10%. However, some pools replace no more than 1% of the entire pool of water per week.

In order to keep the water clear, some swimming and swimming halls use a large number of polyaluminum chloride precipitates to adsorb suspended solids in the water. It looks clear to the naked eye, but in fact, the water is rich in a large amount of aluminum ions, which can cause damage to the human body, especially the eyes.

1. This is because copper sulfate, sodium hypochlorite and alum are used at the right time, so the water quality is relatively clear, and at the same time, the water is blue.

Copper sulfate is mainly used to kill algae, to remove the algae in the swimming pool, sodium hypochlorite is mainly used for disinfection, alum mainly plays a role in precipitation, and two methods are mainly used to keep the water clean, the first is to use the drug pump to automatically dosing, and then to carry out manual sprinkling, if there is sediment, timely underwater dust removal until the water quality reaches the standard.

The blue color of the water in the swimming pool is due to the addition of chemicals to the water, and the addition of chemicals is also for disinfection and sterilization.

2. First of all, the water in the swimming pool must be clear to be blue

Choice of absorption is the main reason why objects take on color. In a certain wavelength range, if a substance absorbs the same amount (referring to energy) of light passing through its various cavity wavelengths, and the absorption amount is very small, the substance is said to be general absorption; If a substance absorbs a certain wavelength of light energy significantly, it is said that the substance has selective absorption. When light hits the surface of the water, part of the light is reflected back and the other part is refracted into the water.

The light that enters the water is absorbed by the water during its propagation. The absorption of light by water is related to the wavelength of the light, i.e., water has selective absorption. Water absorbs light with longer wavelengths significantly, but not with shorter wavelengths.

Red, orange, and yellow light are all absorbed at different depths and increase the temperature of the water. To a certain depth the green light is also absorbed. Blue and violet light, which have shorter wavelengths, scatter or reflect back on water molecules or other particles when they encounter them.

Therefore, when the water is clear and clear, the blue light and purple light absorbed by the water to round beams in our eyes will be reflected and scattered into our eyes, and the water we see will appear blue.

In the hot summer, citizens like to go to the swimming pool to cool off. Next, let's take a look at whether the water in the pool is clean.

01 Disinfectant water.

Inspectors once found that the water in the swimming pool contained disinfectant water, but later found that it was actually residual chlorine, which may be harmful to human health if the residual chlorine content is too high.

02 Infectious diseases.

Due to the mixed number of people in the swimming pool, some infectious diseases can be transmitted through the water, so even if the swimming water looks clean, there are hidden dangers.

03 Urea.

Some children, even adults, may urinate directly in the pool while swimming, so the urea content is very high, which may corrode people's forehead skin.

04 Bacteria.

Not all swimmers are disinfected before swimming, so they can carry bacteria into the pool, and if people accidentally drink water when they are useful, it can cause symptoms such as vomiting and diarrhea.