Bromochlorohydantoin tablets are a new type of sterilizing and disinfecting water treatment agent, which is widely used in the disinfection treatment of industrial water treatment systems, indoor and outdoor swimming (bath) pools, sanitation systems and aquaculture water environments. There have been many reports on the sterilization efficiency of its laboratory, but there are few reports on the sterilization efficiency of swimming pool water. To this end, the researchers conducted related studies on the killing efficiency and influencing factors of bromochlorohydantoin disinfectant tablets on microorganisms in water, and conducted experiments on its harm. The report results are as follows:

1. Neutralizer test results:

Tryptone saline containing 5g/L sodium thiosulfate can effectively neutralize the killing effect of bromochlorohydantoin tablets with a useful halogen content of 20mg/L on Escherichia coli, and the neutralizer and neutralization products on the tested bacteria and culture The base has no effect.

2. Laboratory killing test results:

Under the condition of 20℃~21℃, the useful halogen content of bromochlorohydantoin disinfectant tablets is 2mgL for 2.5min, and the useful halogen content is 1mg/L for 10min, both of which can reduce the number of viable coliform bacteria to 0cfu/100ml.

3. Test results of factors affecting bacteria elimination:

(1) The influence of water temperature: When the temperature of the water sample is 5℃, it will have an effect on the useful halogen content of 1mg/L bromochlorohydantoin disinfection tablet solution to kill E. coli in the water. The action time is increased to 20min, which can reach the qualified level. Standard: When the temperature of the water sample is 30°C, it has no effect on the amount of bromochlorohydantoin disinfectant tablets used to kill E. coli in the water.

(2) The influence of organic matter: When the color of the water sample is 10 degrees, the disinfectant containing 1 mg/L halogen has no effect on the killing of E. coli in the water; when the color of the water sample is 15 degrees, use bromine and chlorine The amount of hydantoin tablets has a killing effect on E. coli in the water, and the action time is increased to 30 minutes, which meets the qualified standard.

4. The pH value of the water sample: when the pH value of the water sample is 6.5 and 7.0, it has no effect on the use of 1mgL of the bromochlorohydantoin disinfectant tablet solution to kill E. coli in the water; when the pH value of the water sample is 8.5 , Has an impact on the amount of bromochlorohydantoin disinfectant tablets that kill E. coli in the water. The action time was increased to 20 minutes, and it reached the qualification standard.

In summary, bromochlorohydantoin disinfectant tablets have a useful halogen content of 1mg/L for 10 minutes, and 2mg/L for 2.5 minutes can reduce E. coli in water to 100cfu/ml; water temperature is low, GC 5℃, pH>7.0, color Degree> 10 degrees, has some influence on the sterilization efficiency of bromochlorohydantoin disinfectant tablets with useful halogen content of 1.0mgL, and the increase of the action time can meet the qualified requirements. Containing 1.5mg/L of halogen content for 30 minutes, the swimming pool water can reach the qualified standard. For mice LD>5000mg/kg, the score for skin stimulation is 0. Therefore, bromochlorohydantoin tablets have a good antibacterial efficiency for microorganisms in water. The bromine disinfection system's own bromine pool characteristics and bromochlorine sterilization at the same time make it show excellent antibacterial efficiency, and the applicable concentration is low. It has little damage and does not produce tumor-causing substances. It is a good disinfectant for swimming pool water.