Reasons and treatment methods of bacteria in swimming pool water always exceeding the standard

How much bacteria are in the pool water or are there excessive bacteria? It is impossible to see and determine with the naked ey.
Similarly, there are all kinds of bacteria in the air we breathe that we cannot see with the naked ey.
For small substances, conclusions can only be drawn if they can be seen under a microscope or detected with special instrument.
But how many bacteria are there in swimming pool water? It also requires a professional water quality tester to determine i.
 The total number of bacteria in the swimming pool water should be less than or equal to 1000/mL in the sanitary standards for swimming pools, which means that exceeding this range will cause discomfort to swimmers, skin allergies, itching, rashes, urinary tract infections and other problem.
Because the instruments on the market to detect bacteria in swimming pool water are expensiv.
Most swimming pools do not directly detect the total number of bacteria, but detect the residual chlorine in the swimming pool water every day to ensure that the swimming pool water has the ability to disinfect, inhibit the bacteria in the water, and prevent cross infectio.
 The total number of bacteria is an important indicator to measure the operation quality of the pool water circulation purification treatment system, and it is also an effective method to understand whether the pool water disinfection is thoroug.
There are many pathogenic microorganisms transmitted through water, and various pathogenic microorganisms cannot be directly determine.
For this reason, the density of pathogenic microorganisms or the possibility of pathogenic bacteria in the water can be indirectly reflected through the two indicators of total bacteria and Escherichia col.
 Coliforms are more resistant than other enteric pathogens in clean water, so it is thought that when the coliforms are killed, other pathogens are also kille.
Therefore, coliform bacteria are used as indicators of water pollutio.
Coliforms are present in the human gu.
If the level of coliform bacteria in the pool water is high, it means that the pool water has been contaminated with human feces, indicating that the pool water may have been contaminated with intestinal bacteri.
 If the total number of bacteria and coliform bacteria in the water can be controlled within the standard range when the pool water disinfection is in place, then the bacteria exceeding the standard is mainly divided into two part.
The residual chlorine value is too lo.
cause bacteria to multipl.
If the residual chlorine is too low, the residual chlorine value can be increased by directly adding the dosage of medicin.
However, this phenomenon has also occurre.
After adding a lot of chlorine disinfectant, the residual chlorine in the detected water still does not increas.
Don't worry about the subsequent treatment method.
The residual chlorine value is too hig.
But the bacteria in the water still exceeds the standar.
The residual chlorine is high, why is the bacteria still exceeding the standard? First of all, it is necessary to know what causes the bacteria to still exceed the standard in the case of high residual chlorin.
 1) High pH value - affects the content of hypochlorous acid and hypochlorite, thereby affecting the diffusion and adsorption process of chlorine disinfectant, and the sterilization effect is weakene.
2) The content of combined residual chlorine is too high - the organic matter, urea, et.
in the water produce chloramine, which will reduce the disinfection and sterilization of chlorine, and chloramine is what we call combined residual chlorine/combined residual chlorin.
Combination Residual chlorine can diffuse and adsorb to the surface of bacteria, but its bactericidal power is wea.
 3) High cyanuric acid - as long as the chlorine-containing disinfectant with trichloroisocyanuric acid or dichloroisocyanuric acid as the main component is used, it will contain cyanuric acid after hydrolysis, and cyanuric acid is used as a stabilizer, which can control hypochlorous acid Only a certain amount is generated at a time, so that the chlorine in the agent is gradually release.
Even under sunlight, only a small part of hypochlorous acid is lost each tim.

 However, it will continue to accumulate in the pool wate.
If the cyanuric acid is too low, the chlorine disinfectant will be quickly volatilized and consumed, but if the cyanuric acid is too high, the slow-release effect of chlorine will be lost, and the gap between free residual chlorine and cyanuric acid will be los.
Loss of balance will lead to a decrease in the disinfection and oxidation capacity of free residual chlorine, resulting in the growth of bacteria and algae, and the water is white and turbi.
Even lead to chlorine can not play a role in disinfectio.
 4) Low temperature - temperature will affect the diffusion rate of chlorine disinfectant, thereby affecting the bactericidal performance of chlorine disinfectan.
The lower the temperature, the slower the diffusion speed of the disinfectant, and the worse the sterilization effec.
Generally, it has a greater impact on indoor heated swimming pools and bathing place.
 5) High total dissolved solids (TDS) - total dissolved solids refers to the total amount of all solutes in the water, and the higher the TDS value, the more dissolved solids the water contain.
For a pool that has not been replenished for a long time, TDS increases with time Accumulation, the pollutants brought in by swimmers and the added chemicals gradually accumulate in the pool water, which will lead to high TDS, which will affect the diffusion and adsorption process of chlorine disinfectants, thereby affecting the sterilization effect of chlorine disinfectant.
Commonly, in Dead Sea pools, due to high salinity and high TDS in water, the bactericidal effect of chlorine is limited, which leads to problems such as algae growth and muddy wate.
The water principle of the swimming pool is also simila.
For these reasons, we provide corresponding treatment methods as follows:  Residual chlorine is too low  Treatment method: oxidative shock, chlorine-free shock treatment agent dosage of 5-10 grams per cubic wate.
If the water body is dirty, the dosage of 10-20 grams per cubic meter of water should be dissolved first and then sprinkled evenly into the pool wate.
After the product dissolves in water, a large amount of new ecological oxygen is generated, which can oxidize the chloride ions in the water into hypochlorous acid, eliminating the need for Combined residual chlorine/combined chlorine in water, and at the same time improve the sterilization and disinfection ability of chlorine in water, chlorine disinfectant can be added later to maintain pH 4-6, and residual chlorine is between 3-5mg/.

 High pH content  Treatment method: pH reducing agent, add 10-15 grams of water per cubic meter for each reduction of 0, and so on, if the pH value is low, pH increasing agent can be use.
until the specified range is reache.
 Treatment method for excessive combined residual chlorine content: no chlorine shock treatment agent, increase the free residual chlorine to 0ppm, strengthen the oxidative shock treatment, remove the combined residual chlorine, and improve the redox capacity of the pool wate.
 High cyanuric acid treatment method: At present, there is no special chemical treatment for cyanuric acid, and it can be decomposed by changing water or ultraviolet ray.
Do the impact treatmen.
Low temperature Treatment method: The temperature of the swimming pool water should be maintained at 26-30.
 Total dissolved solids (TDS)  high treatment method: replenish new water or change part of the water, and control the TDS within the raw water TDS+1000pp.