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Effective agents for disinfecting swimming pools
1) Increasing pH reduces disinfecting power, so chlorination is useless at pH above 7.6 and bromine at pH above 8.
2) If stabilizers are used, the dose of chlorine should be increased.
3) Swimming pools must be equipped with a filtration system to produce clean water. The disinfection process is easier for filtered water and fewer by-products are produced.
What is chlorination and why is chlorine used in swimming pools?
Injection pump: This process is considered one of the most important methods of water disinfection and the removal of pathogenic microorganisms in swimming pools. Although using this method of disinfection also causes problems, including chlorine-resistant microorganisms such as Cryptosporidium parvum and Giardia lamblia and the formation of disinfection by-products (DBP), which can be dangerous. These substances can cause breathing problems through chlorine in covered swimming pools where there is no proper ventilation.
According to dieselnet.com, previous studies have reported more than 100 of these disinfection byproducts in a sample of pool water. Among the carbonaceous DBPs, there are tri-methanes or THMs, haloacetic acids or HAAs and trihaloacetaldehydes or THA, and among the nitrogenous DBPs there are halo-acetonitriles or HANs and chloramines or CAMs.
The composition and distribution of each of these disinfection by-products depends on various factors such as: water source, bromine ion concentration, chlorine dose, temperature, free residual chlorine or FRC, total organic carbon or TOC, PH, and total nitrogen or TN. he got it. Among these factors, the most important is the level of residual free Cl. It is recommended that for indoor pools, the amount of FRC is between 0.8 and 2 mg/L, and for outdoor pools, this amount is between 0.8 and 3 mg/L.
The physical properties of chlorine
1) Chlorine is a yellowish-green gas that dissolves in water in a very small amount.
2) The odor threshold for this substance is 0.31 ppm.
How is swimming pool water treated with chlorine?
Various chlorine-containing compounds are used to disinfect swimming pools, including chlorine gas, sodium hypochlorite, calcium hypochlorite, lithium hypochlorite, and chlorine isocyanurate. When any of these compounds enters the water, hypochlorous acid, which is an active disinfectant agent, is released. Pool chlorine comes in the form of tablets, granules or powder. Depending on the type (powder, tablets, etc.), the chlorination method will also be different. The powder form has to be manually added to the water, which takes almost as long.
Grains are usually easier to use and different methods can be used for this. The floating basket in which the tablets are placed and comes into contact with water can be used, although it is not strongly recommended. The best way is to put the tablets in a basket at the entrance to the pool. Using automatic whitening agents is the fastest and best possible method, which of course has a higher cost than other methods.
Why does swimming pools smell of chlorine sometimes?
Naturally, sanitary and regular swimming pools should not smell of chemicals and chlorine. Usually, swimming pools face this problem, but if the amount of consumables is controlled, this will not happen. The odor from disinfecting swimming pools is not caused by chlorine alone, but by chloramine compounds.
Chloramines are formed when chlorine combines with amine compounds released into water through saliva and sweat. Chlorine shock or superchlorination is the only method that destroys the bond between these two materials.
What is the chlorine limit for swimming pools?
Depending on the cases mentioned, factors such as pH, characteristics of the water present, presence or absence of stabilizers, etc. affect the amount of chlorine used in the pool. Therefore, the exact amount to add to the water should be calculated after checking the water test results and in consultation with an expert. The addition of these disinfectants leads to the formation of free chlorine in the water, which is extremely dangerous in high doses. They should be measured weekly using special kits.
According to the US Environmental Protection Agency (EPA) report, the effects of this substance on the body in different doses are as follows:
Poisoning with this substance includes mild irritation of mucous membranes at 1 to 3 ppm, chest pain, cough and vomiting at 30 ppm and inflammation of lung tissue or pneumonia and serious lung problems at doses between 46 and 60 ppm.
What are the most important ways to disinfect swimming pools?
The following table shows the most important and popular methods of disinfecting swimming pools:
Other ways to disinfect swimming pools
This method is a secondary method of disinfection and is very useful for controlling Cryptosporidium parvum and Giardia lambia microorganisms. This method is very economical compared to chlorine to improve the quality of the water and the pool.
Due to the high oxidation potential of ozone, this substance is used for disinfection. The presence of free radicals and residual disinfectants in swimming pool water and their evaporation over time into the air is harmful. Due to the high dose of ozone needed for disinfection, this process is generally accompanied by a process of ozone removal and then chlorination before the water enters the pool.
What are the advantages and disadvantages of different methods of disinfecting swimming pools?
What dose of carcinogenic by-products produced by disinfectants?
The beauty of your home swimming pool depends largely on the cleanliness of its water. How well you take care of your pool has a huge impact on its appearance. Apart from this, it is very important that your swimming pool water is disinfected. For this purpose, you can ask Claire for help. Chlorination is a well-known method of water disinfection. This disinfectant is used to eliminate contamination due to its high stability in water. Of course, it cannot be denied that chlorine, like many other disinfectants, has drawbacks. However, the great effect of this substance in disinfecting water has caused its widespread use.
If you also want to clean your pool from contamination and give it a clean and clear look, you should consider using chlorine. In this article, we’ll walk you through what you need to know about chlorinating home pools. be with
Chlorine is an important chemical element used as a water disinfectant. This substance is used to kill bacteria and other microbes in the water. Among the chemical disinfectants, chlorine and its derivatives are the most commonly used in the purification of swimming pool water. Of course, it should be borne in mind that chlorinators cannot replace filter units and are used only for final water purification. Chlorine is the most desirable substance used to disinfect swimming pool water. The quality of this cleanser is perfect. Chlorine kills bacteria in pool water and also provides the suspended particles needed to deal with pollution from swimming.
Chlorine is accepted as a disinfectant and has a wide range of uses. Today, to prevent a deficiency or excess of chlorine in water, methods are used that automatically and timely carry out chlorination.
The more bacteria and organic matter entering the water, the more chlorine will be needed for disinfection. Therefore, if a lot of people use the pool, it’s a good idea to think about more chlorine. Of course, some chlorination systems can automatically assess the required amount of chlorine and perform the chlorination process.
Experience has shown that if the pool is placed outdoors, the sunlight will quickly wash away the residual chlorine. In this case, higher capacity chlorinators should be used to adjust the amount of chlorine in the water.
Various chlorination methods are used, each with unique properties. It is best to know and compare these methods before chlorinating your pool water to get the best results.
The first method is to use linear chlorine pill or dosing pumps. This method is used to inject chlorine in a fixed amount. During this method, a constant amount of chlorine is always introduced into the water and dissolved in it. In fact, there is no correlation between the amount of chlorine introduced and the level of contamination.
The second way to chlorinate a home pool is to use gas chlorinators. This method has lost its use and has become much less used. Chlorine gas has a high purity, so it is added to the water when no one is using the pool. Due to the high purity of this chlorine, discomfort such as burning eyes may occur after swimming.
The third method is to use automatic systems for chlorine and acid injection, metering and control. In this method, special sensors are used that measure the water quality parameters and according to these parameters, they order the introduction of chlorine into the water. In fact, it can be said that these same pumps determine the right time to inject chlorine.
