When the PH value is high and low, the treatment method is well known. In order to achieve the disinfection effect in the swimming pool water treatment process, various disinfectants and disinfection equipment are used. These limits are obtained under the premise of water quality microbiological safety. Good maintenance of people's physical health, in line with human sensory requirements. Since the bactericidal action of most disinfectants depends on the pH, it is necessary to maintain the pH within the optimal range of a disinfectant in swimming pool water treatment. The national standard swimming pool has a pH of between 6.5 and 8.5, but the optimum pH for the human body is 7.2--7.6.
When the pH of the water is greater than 8.0, what happens in this case? At this time, most of the water in the pool is hypochlorite OCl-, and hypochlorite HOCl (residual chlorine) only accounts for a small part, which will undoubtedly greatly reduce the activity of the disinfectant in water, thereby affecting algae and sterilization. The effect will eventually lead to the flooding of green algae in the pool water, which will result in repeated bans; it will also cause you to detect low or even undetectable residual chlorine, so this is not a problem of the quality of the disinfectant, but the result of improper pH control. The high PH value of the swimming pool indicates that the water is alkaline, and the principle of the treatment method is very simple, that is, the acid-base neutralization principle is utilized.
First, the acidic substance hydrochloric acid can be added to the swimming pool water to be acidic. Generally, the pH value of the tested water is as high as 8.2, and the appropriate amount of hydrochloric acid can be placed. The dosage should be placed according to the actual test. Example: PH value = 8.2, 5-10 kg can be put into every 1000M3 water to restore the best situation. (Saline and alkali have strong corrosive properties and should be automatically administered using a drug delivery pump)
Second, you can add water to dilute the alkalinity in the water. In most cases, the water in the swimming pool will be acidic. Besides, some of the sweat on the swimmer itself is also acidic.
When the pH of the water is less than 7.0, what happens in this case? At this time, most of the pool water is hypochlorite HOCl (residual chlorine), while hypochlorite OCl- only accounts for a small part, that is It is said that the disinfectant has a high activity in water, and a large part of the disinfectant you put in is wasted, so your residual chlorine will soon be low. The key to solving the problem is to adjust the pH to the most suitable value for the disinfectant: PH=7.5. After the disinfectant is put into the water, about half of it will be hydrolyzed into residual chlorine to play a disinfecting role. When the residual chlorine drops, the secondary chlorine The acidate combines with the hydrogen ions in the water to form OCl-+H+?HOCl, which allows the disinfectant to be used for a longer period of time. Therefore, the pH of our swimming pool water should be kept at 7.5 as much as possible to ensure disinfection and maximum cost savings. The swimming pool generally uses sodium hydroxide or sodium carbonate to increase the pH of the pool water.
First, the use of sodium hydroxide for each 1.0 degree increase is applied at a dose of 10 grams per cubic meter of water. (For example: 1000 cubic meters to increase the PH to 1 need to add 10 kg of sodium hydroxide);
Second, using sodium carbonate for every 1.0 degree increase, it is administered at a dose of 15 grams per cubic meter of water. (For example: 1000 cubic meters to increase the PH to 1 requires the addition of 15 kg of sodium carbonate).
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