Domestic drinking water refers to drinking water and domestic water for human life. my countrys current "Hygienic Standards for Drinking Water" stipulates strict hygiene requirements for the quality of drinking water, namely: ①Good sensory properties: transparent, colorless, no odor and odor, and no visible objects; ②Epidemiology Safety: does not contain pathogenic microorganisms and parasite eggs; ③The chemical composition is harmless to humans: the chemical substances contained in the water do not cause acute poisoning, chronic poisoning or long-term harm to the human body.
2. Why does tap water smell of chlorine?
Disinfection of tap water with liquid chlorine is a common disinfection method at home and abroad. In order to maintain the disinfection effect of tap water and avoid microbial contamination during the transportation of pipe networks to users, the residual chlorine content in tap water must be above 0.05mg/L, so tap water will have a chlorine smell.
3. What are the methods of disinfecting drinking water?
The current drinking water disinfection methods in my country mainly include chlorination disinfection, chlorine dioxide disinfection, chloramine disinfection, ultraviolet disinfection and ozone disinfection.
4. Why does tap water appear milky white?
When tap water is transported in high-pressure sealed pipes, the air in the pipes will dissolve into the water due to the high pressure. When the tap water flows out from the faucet, the air in the water will be released as the pressure returns to normal, thus forming Countless tiny bubbles give the water a milky white appearance. After being left for a while, it will become clarified and will not affect drinking water hygiene.
5. Why does scale appear in the kettle?
The water used in daily life has a certain hardness. For example, if the water has a high hardness, when it is heated, the insoluble salt components of calcium ions and magnesium ions (such as calcium carbonate and magnesium carbonate, etc.) will be removed from the water. Precipitates and adheres to the inner surface of the kettle to form scale.
