1. The disinfection method used must have a strong bactericidal effect, that is, kill 99% of microorganisms within 30 seconds.
2, the sterilization effect should have a reasonable duration, so that the pollutants brought into the pool by the swimmer can be effectively controlled;
3. There should be no secondary pollution at the same time of disinfection, that is, new damage to the human body or the environment;
4, management and operation is convenient, the dosage must be easy to control;
5. Equipment investment and operating expenses must be reasonably economical;
6, does not cause water and environmental pollution, does not change the water quality of the pool;
7. No irritation or irritation to the human body;
8. No corrosion or corrosion to building structures, equipment and pipelines;
9, safe, non-toxic, no residue.
10. The select disinfectant must meet the relevant national standards, and the water quality can reach the standard after use.
Comparison of advantages and disadvantages of chlorine disinfectant
At present, China should have the best chlorine disinfectants: liquid chlorine, bleaching powder, sodium hypochlorite, bleaching powder, trichloroisocyanuric acid (aka: strong chlorine or TCCA); then, let us analyze, Which of these chlorine-containing disinfectants is more suitable for swimming pool disinfection?
The price is low, but because of the high corrosiveness, the equipment has to be updated frequently, the cost is large, and the leakage of personal injury accidents is a common occurrence.
The chlorine content is very low, and the amount of chlorine in the national standard is required to be large. It is difficult to save heat, light and humidity. More slag. It is necessary to keep feeding to maintain the chlorine content required by the national standard, but it will increase the turbidity; the advantage is that the pH value is not easy to fall.
The chlorine content of the water agent is ≤10. 80 kg is placed every day. Within four hours, chlorine can be volatilized into the air as a gas with a residual chlorine of zero. If it is indoors, it is eroded to building. Thereby increasing the number of overhauls. The pH rises very quickly and is regulated with a strong acid.
It is a commonly used disinfectant. Use no less than 15-25 kg per day. Afraid of light, heat, and humidity. The effective chlorine volatilization during storage is reduced by about one percentage point per month. At 12 o'clock in the evening, it will be placed at 1.0 PPM until the morning is only 0.6 PPM, and at 0.3 noon in the afternoon, the residual chlorine is 0. At this time, the time when the amount of tourists is high should be replenished. If there is no circulating equipment pool [Kindergarten Pool], the turbidity of the feed water will be higher. The advantage is that the matrix of the bleaching powder is lime, and the pH value drops slowly.
Trichloroisocyanuric acid is in the form of its six-cyclic chain structure. After dissolving in water, it can keep the residual chlorine amount at about 0.5PPM [prerequisite pH should be around 7.0-7.2]. Use 3 kg per day. At the same time, an equivalent amount of three kilograms of sodium hydroxide should be added to ensure that the pH does not decrease. This will ensure enough residual chlorine to kill bacteria in the pool. It was found that algae was released to 2.0 PPM to eliminate algae. And there is no excitement on the human eye.
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