As we all know, fresh water accounts for only 2.53% on the earth, and all kinds of sewage will be produced in life. What gas can be used to disinfect water?
0 1 tap water is generally disinfected with chlorine, and about 0.002g chlorine is introduced into 1L water. The principle of disinfection is to react with water to produce hypochlorous acid, which has strong oxidation performance to kill bacteria in water. The reason why hypochlorous acid is not directly used for disinfection of tap water is that hypochlorous acid is easy to decompose, difficult to store, high in cost and toxic. Chlorine disinfection can balance the dissolution, decomposition and synthesis of hypochlorous acid in water, with appropriate concentration and less residual toxicity in water.
Chlorine, the chemical formula is Cl? . Under normal temperature and pressure, it is a yellow-green toxic gas with a strong pungent smell. Asphyxiating, denser than air, soluble in water and alkali solution, soluble in organic solvents (such as carbon disulfide and carbon tetrachloride), easily compressible and liquefied into yellow-green oily liquid chlorine. It is one of the main products in chlor-alkali industry and can be used as a strong oxidant.
China patent discloses the method of treating beer wastewater with chlorine. Chlorine is a commonly used disinfectant in water supply companies, with low price, low dosage, reliable disinfection and mature technology. Chlorine can also deodorize and remove microorganisms, and the removal rate of biological oxygen consumption and chemical oxygen consumption is also high, which can ensure the stability of recycled water quality, so it is more suitable for brewery sewage treatment.
When hydrogen with a volume fraction greater than 5% is mixed with chlorine, there may be a danger of explosion. Chlorine gas is toxic, which mainly invades the human body through the respiratory tract and dissolves in the moisture contained in the mucosa, causing damage to the upper respiratory mucosa. Chlorine gas can react with organic and inorganic substances to produce various chlorides. Mainly used in the production of plastics (such as PVP), synthetic fibers, dyes, pesticides, disinfectants, bleaching solvents and various chlorides.