Principles for selecting drinking water sources in rural areas:
1. Sufficient water. The amount of water in the source must meet the needs of the masses. Water supply can be estimated from hydrological or hydrogeological surveys.
2. The water quality is good. When selecting a water source, it is necessary to comprehensively evaluate the water source water quality and its changing laws. If the water quality is greatly affected by the environment, such as the large amount of sediment in the rainy water, yellow water, etc., you can choose the relevant water treatment equipment to purify and then provide centralized water supply to the villages and towns. For the selection of equipment, an integrated rural domestic drinking water treatment equipment can be selected for purification treatment.
3. Sanitary and clean environment. The sanitary conditions around the water source area are good, and there are no fixed pollution sources. Before selecting the water source, you should investigate the environmental sanitation situation around the water source in detail.
4. Easy to manage and use. Selection of water sources must also consider issues such as ease of use, easy management, low equipment investment, high efficiency, and convenient management.
Importance of disinfection of rural drinking water:
Water from the water source must be sterilized after being processed in various processes before it can be used by the masses.
1. There are many types of intestinal pathogenic microorganisms transmitted by water, and they can cause outbreaks of infectious diseases through water.
2. Untreated sewage, especially hospital sewage, is discharged into the water body, bringing a large amount of intestinal pathogenic microorganisms into the source water. Therefore, drinking water must not only be disinfected, but also thoroughly disinfected to ensure the health of the user.
Method for disinfection of rural drinking water:
1. Sterilize by boiling. This is a method that lasts for thousands of years in China. Boiling disinfection has played an effective role in preventing intestinal infectious diseases.
2. Ultraviolet disinfection. Ultraviolet disinfection can use water surface irradiation method and water irradiation method, but for severely polluted water quality, the use of ultraviolet disinfection alone is not effective.
3. Chlorine disinfection. Chlorination disinfection is one of the most common and effective methods of chemist disinfection. There are three kinds of chlorine agents for drinking water disinfection: liquid chlorine, inorganic chlorine and organic chlorine agents. Bleaching powder, bleaching powder, and sodium hypochlorite belong to inorganic chlorine preparations; Ketamine, Chrysanthemum (dichloroamine p-hydroxybenzenesulfonic acid), etc. belong to organic chlorine preparations; sodium hypochlorite is commonly used in rural drinking water treatment.
4. Ozone disinfection. This method requires on-site manufacturing and is generally used less in rural drinking water treatment.