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Anonymous users2024-02-07Domestic water is the most widely used in home life. Depending on the steps of life, we can adopt different methods of water use. 1. Laundry.
Modern homes mostly use washing machines to wash clothes. For light, thin, and easy-to-wash clothes, please try to wash them by hand, which can save a lot of water; The waste water generated in the process of washing clothes should not be poured out in vain, it can be stored, the dirty water is used to flush the toilet, and finally the clean water used to wash clothes can be used to mop the floor. In addition, ordinary laundry detergent contains phosphorus, and phosphorus in the sewage treatment process, can not be removed, will be discharged into the river with sewage, some rivers in our province part of the total phosphorus exceeds the standard (such as the upper reaches of the Sun River in Xinglong Overseas Chinese Tourist Resort), it is due to the phosphorus in the washing products.
Excessive phosphorus content in water bodies can easily lead to eutrophication of water bodies. Use bleach sparingly, as bleach contains chlorine. 2. Clean the kitchenware.
Kitchen utensils such as dishes and chopsticks usually absorb a large amount of edible oil and various condiments, and the oil stains on the kitchenware can be wiped dry with old paper before cleaning, and the paper stained with oil can be disposed of as fixed garbage. This is done by converting oil pollution into solid waste, which can be treated by incineration, landfill, etc., to reduce the discharge of oil pollution to the river, to reduce the use of washing liquid, and to reduce water consumption. The quality of drinking water is high, and after being absorbed by the human body, it is discharged through perspiration, urine, etc.
In this link, we need to pay attention to how to ensure the health and hygiene of drinking water and not cause harm to health. The Ministry of Health of the People's Republic of China has formulated the "Sanitary Standards for Drinking Water", which contains four aspects: sensory properties and general chemical indicators, toxicological indicators, bacteriological indicators and radioactivity indicators. The 7 standards of clean drinking water do not contain ——— substances that are toxic and harmful to the human body, such as heavy metals, impurities and bacteria, radioactive substances and fluorescent substances, etc., which should be controlled within the indicators stipulated by the state; The hardness of the water is moderate; Contains the right amount of minerals necessary for the human body; pH should be neutral or weakly alkaline; The molecules of water should be small, which is convenient for improving the biological efficiency and physiological function of water; The content of water-soluble carbon oxide is moderate; It can effectively remove acidic metabolites from the body.
Judging by sensory standards, it means that drinking water should be colorless, tasteless, odorless, and free of visible sediments, aquatic organisms and other disgusting substances.
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