On January 30, the General Office of the Ministry of Ecology and Environment of China issued the 'Notice on Doing a Good Job in Responding to the Emergency Detection of the Ecological Environment in the Pneumonia Epidemic of Novel Coronavirus Infection'. Monitoring of two epidemic prevention and control characteristic indicators of biotoxicity On February 2, the 'Notice on the Supervision of Medical Sewage and Urban Sewage in the Pneumonia Epidemic of New Coronavirus Infection' issued on February 2 also pointed out that
residual chlorine and other disinfectants and Concentration control of relevant parameters such as the number of fecal coliform bacteria. For the detection of residual chlorine pointed out in the notice, Lianhua Technology provides you with the following detection plan, hoping to provide effective help for the control of water quality characteristic pollutants during the epidemic. Why use a residual chlorine meter to detect residual chlorine? Residual chlorine refers to that after chlorine is put into water, in addition to consuming part of the chlorine with bacteria, microorganisms, organic matter, inorganic substances, etc. in the water, there is still a part of chlorine left. This part of chlorine is called residual chlorine, also known as free chlorine. . The total residual chlorine is the sum of combined residual chlorine and free residual chlorine. Combined residual chlorine (refers to the compound of chlorine and ammonia in water, including NH2Cl, NHCl2 and NHCl3); free residual chlorine (refers to OC1+, HOCl, Cl2, etc. in water). The residual chlorine we usually refer to refers to free residual chlorine. At present, public places and households often use chlorine-containing disinfectants for disinfection in order to prevent and control the epidemic. On the one hand, it is necessary to ensure sufficient concentration of disinfectants to achieve the disinfection effect; on the other hand, the amount of residual chlorine in sewage discharged into urban sewage treatment plants may be high High, affecting the normal operation of the biochemical treatment unit. At the same time, too high residual chlorine may also affect surface water, groundwater and drinking water sources, and affect the ecological environment and drinking water sources. Determining the content and state of residual chlorine in water is extremely important to the disinfection effect, environmental water quality and ensuring the safety of drinking water.
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