I. Different drinking water quality standards and three basic hygiene requirements 1. In order to prevent the occurrence and spread of water-borne infectious diseases, drinking water is required to contain no pathogenic microorganisms. 2. Chemicals and radioactive substances contained in water shall not be harmful to human health. It is required that chemicals and radioactive substances in water will not cause acute and chronic poisoning and potential long-term harm (carcinogenesis, teratogenicity and mutagenicity). 3. The sensory characteristics of water are people's intuitive feelings about drinking water and an important basis for evaluating water quality. Domestic drinking water must ensure good senses and be enjoyed by people. Direct drinking water contains 1. No pollution, 2. Not degenerate (full of vitality), 3. Second, the Ministry of Health announced seven standards for direct drinking water: 1, which does not contain substances that are toxic, harmful and smelly to human body; 2. The hardness of water is moderate (calculated by calcium carbonate: 50-200mg/L); 3. The proportion of minerals and trace elements in water is similar to that in human body fluids (including calcium content >: = 8 mg/L). Moderately alkaline or weakly alkaline (PH 7.0-8.0) pH color code cards can be used to determine the pH of water. 5. The content of dissolved oxygen and carbon dioxide in water is moderate (dissolved oxygen in water >; =6mg/L, and the carbon dioxide content is 10-30mg/L)6. Small molecular water (this is one of the indicators of water activity, 5-6 small molecular water).
7, the physiological function of water is strong (including permeability, solubility, metabolism, etc. )
The stainless steel direct drinking machine is directly connected with municipal tap water. Through the built-in filtration system and high-temperature disinfection of the stainless steel direct drinking machine, the filtered water meets the national standards. Direct drinking water can be drunk directly, which is the best choice for hospitals, schools, factories and other crowded places.