With the advent of summer, swimming pools are also getting hotter. To prevent the occurrence of public health hazards in swimming pools, the health department will also strengthen the hygiene supervision of swimming pools. According to the requirements, swimming pools must start circulating water purification and disinfection equipment every day.
First, disinfection of swimming places
1. Clean, scrub, or flush the outside of the pool, the poolside walkway, and the sanitary facilities once after each shift. When it is found to be contaminated, it can be sprayed or wiped with chlorine-containing disinfectant at a concentration of 250-500 mg/L, and then wiped with clean water. The emergency room should be cleaned and disinfected regularly.
2. The shower room should be brushed frequently, and the ground can be periodically disinfected with chlorine-containing disinfectant at a concentration of 500mg/L.
3. The locker should be cleaned and disinfected after the daily opening. It can be sprayed or wiped with chlorine-containing disinfectant at a concentration of 250-500mg/L, and then wiped with clean water.
4. The public toilets (toilet) and rubbish bins (barrels) should be cleaned daily and regularly disinfected with chlorine-containing disinfectant at a concentration of 500mg/L.
5. The centralized air conditioning system shall be regularly cleaned and disinfected in strict accordance with the requirements of the "Administrative Measures for Centralized Air Conditioning and Ventilation System in Public Places". Other drinking water, disinfection, rescue and other facilities and equipment should be regularly cleaned and disinfected.
Second, swimming pool water
Circular water purification and disinfection equipment
Swimming pools must be equipped with circulating purified water and disinfection equipment, and they can meet the requirements for water quality treatment. The water purification and disinfection equipment for swimming pools should be kept intact and complete. A regular inspection and maintenance system should be established, and regular inspections, maintenance and repairs should be made and records made. If problems are discovered and repaired in time, a complete set of emergency measures shall be taken to ensure that all types of facilities and equipment are in normal operation and remain in good condition.
The selection of circulating water and disinfection equipment should meet the following requirements:
1. Simple, safe, reliable, simple operation and maintenance
2. The metering device is accurate and flexible
3. Dosing system can be automatically controlled and safe and reliable
4. At least one set of chlorinator should be set aside for use. The chlorinator should have stable and uninterrupted water supply. The operation and stoppage of the chlorinator should be interlocked with the running and stopping of the circulating pump.
Swimming pool water disinfection
The choice of disinfectant should meet the following requirements:
1. Strong sterilizing ability and continuous bactericidal function
2. Does not cause water and environmental pollution, does not change the quality of pool water
3. No irritation or irritation to the human body
4. Little corrosion to building structures, equipment and pipes
Swimming pool water should be disinfected with chlorine-containing disinfectants. At present, chlorine-containing disinfectants used in our swimming pools include liquid chlorine, bleaching powder, bleaching water, and strong chlorine (TCCA). Drifting powder is gradually eliminated due to the presence of residues that block pipes and affect water quality. Chlorine in bleaching water is extremely unstable, and its available chlorine will gradually decrease with the influence of environment, temperature, humidity, light and storage time and other factors. The use of liquid chlorine disinfection should prevent leakage measures, including the water treatment room should be away from the swimming pool and closed, the room has an emergency alarm device, etc.; liquid chlorine should adopt vacuum type automatic dosing method, and should be set up chlorine and pool water fully mixed contacts Device; strong chlorohydrin (TCCA), due to its conjugated group, gradually decomposes in the water to release hypochlorous acid, and the remaining cyanurate stabilizes available chlorine in the water. It is also non-toxic and stable. In recent years, a large number of swimming pools in China use TCCA as a disinfectant for swimming pool water.
Ozone, ultraviolet light or other methods of disinfection may be used where conditions and needs apply. When using ozone or ultraviolet disinfection, chlorine disinfection should also be added to maintain the continuity of disinfection.
The amount of chlorine added in the swimming pool water (including the new water continuously supplied by the children's swimming pool) is determined by the amount of free residual chlorine in the pool water of 0.3-0.5 mg/L. The amount of chlorine added to the foot bath disinfection pool is the amount of free chlorine in the pool water. -10mg/L calculation confirmed that dosing time is best performed 1-2 hours before opening. When the swimming pool is open, it is necessary to regularly measure the residual chlorine in the swimming pool water and make a record. If there are conditions, when the indoor swimming pool is open, the residual chlorine is measured every 2 hours; when the outdoor swimming pool is open, the residual chlorine is measured every hour.
Prevent algae
In order to prevent artificial swimming pools from growing algae, 0.25-0.5mg/L copper sulphate (delivered at 2-3kg per 1000m3 of water) is added to the pool water, and the maximum dosage of algae should not exceed 1.0mg/L. -2 is better.
Third, the disinfection of public supplies
1. The public equipment (including slippers, tea sets, etc.) used by the swimmers for swimmers should be disinfected on a one-off basis.
2. Cleaning and disinfecting of slippers: A special slippers decontamination room or area should be set.
Set up two decontamination tanks or decontamination buckets, equipped with rubber gloves, disinfectants, and water sources.
Cleaning: First wash the slippers with water or detergent.
Over water: Rinse slippers with clear water in a sink or over bucket.
Disinfection: In the drug pool or drug barrel, the slippers should be completely immersed in the liquid. The concentration and soaking time of the liquid must be strictly controlled according to the instructions for use of the drug. When chlorine-based disinfectants are used, the insoluble solution should have an effective chlorine content of 250-500 mg/L and a soaking time of not less than 30 minutes.