Licensed books on medicine
<< Previous || Next >> |
Special methods for improving water quality
The traditional technology of water treatment in water supply systems has a limited barrier effect on many chemicals. Groundwater is very often highly mineralized and needs special treatment. Let's consider some of them. Deodorization - elimination of odors. Achieved by aeration, treatment with oxidizing agents (ozonation, large doses of chlorine, potassium permanganate), filtration through activated carbon. Iron removal is carried out by spraying water for aeration in special devices - cooling towers. In this case, ferrous iron is oxidized to iron oxide hydrate, which is deposited in the sump and is retained on the filter. Water softening is achieved by filtration through ion-exchange filters loaded either with cation exchangers (exchange of cations) or anion exchangers (exchange of anions). There is an exchange of Ca and Mg ions for ions No. or H +. Desalination. Sequential filtration of water, first through cation exchange resin, and then through anion exchange resin, allows water to be freed from all salts dissolved in it.
The thermal desalination method is distillation, evaporation followed by condensation. Freezing Electrodialysis - desalination using selective membranes. Decontamination. A 70-80% reduction in the content of radioactive substances in water occurs during coagulation, sedimentation and filtering of water. For deeper decontamination, water is filtered through ion-exchange resins. Water defluorination is carried out by filtration through anion exchange filters. Often activated alumina is used for this. Sometimes, to reduce the concentration of fluorine, water is diluted with another source that does not contain fluorine or contains it in negligible amounts. Fluoridation. Artificial addition of fluoride. Carried out with a fluorine content in water of less than 0.7 mg / l in order to prevent dental caries. Fluoridation of water reduces the incidence of caries by 50-70%, i.e. 2-4 times.
| << Previous || Next >> |
| = Skip to textbook content = |
Special methods for improving water quality
- Basic methods for improving water quality
Water coming from water bodies to the central water supply system is preliminarily treated at waterworks, as a result of which its quality is brought into compliance with the requirements of SanPiN 18.104.22.1684-01 “Drinking Water”. The main methods for improving the quality of drinking water are its clarification and discoloration (elimination of turbidity and color), as well as disinfection
- Methods for improving the quality of drinking water. Disinfection of drinking water at centralized water supply and in the field
There are many methods to improve water quality, and they allow you to free water from dangerous microorganisms, suspended particles, humic compounds, from excess salts, toxic and radioactive substances and odorous gases. The main goal of water purification is to protect the consumer from pathogenic organisms and impurities that can be dangerous to human health or have unpleasant properties (color, smell, taste
- Hygienic requirements for the installation and operation of water from surface water sources. Water Quality Improvement Methods
Currently, 84% of the total amount of water supplied to cities and towns is taken from surface water bodies. Reliable and uninterrupted operation of the drinking water supply system largely depends on the choice of the location of the water intake. It is important to consider hydrological, sanitary and technical and economic conditions, among which the main, determining, factor is sanitary.
- Ways to improve water quality
The main ways to improve water quality are clarification, discoloration, deodorization and disinfection. By clarification of water is understood the removal of suspended particles from it. Discoloration - removal of stained colloids or solutes. The purpose of disinfecting (or disinfecting) water is to neutralize the pathogenic bacteria and viruses contained in the water. Sometimes have
- Special water treatment methods
Special methods for improving the quality of drinking water include conditioning the mineral composition, removing flavors, odors, decontamination, etc. All types of conditioning the mineral composition of water can be divided into 2 groups: 1) removing excess salts or gases from the water (softening, desalination, deferrization, deodorization, decontamination, defrosting, etc.); 2) adding to water
- Non-drug improvement in sleep quality
For some reason, it seems to me that you are starting to get involved in my methodology of combating hypertension. Even though you are not yet very experienced, I still enjoy the thought that there is someone who liked my methodology of classes, which will certainly benefit this person - he will teach to lower blood pressure with non-medications and keep it at the optimal level for the body level.
- Prerequisites for the development of continuous quality improvement
The founder of the scientific management system of the enterprise, called Taylorism, was the president of the American Society of Mechanical Engineers (ASME) Frederick Winslow Taylor, who in 1900-1903. developed the principles of scientific enterprise management. In the work of Shop Management, he suggested using a scientific systems approach for enterprise management. Since 1903 he was engaged in propaganda
- Hygienic requirements for the quality of drinking water
The standardization of the quality of drinking water is one of the important preventive measures of a state nature. In the process of development of standardization, the criteria for water safety for public health have changed as medical and biological knowledge has accumulated, as well as technical advances to improve water quality. Initial rationing of drinking water quality
- About water quality
Water is one of the elements and differs among the totality of elements in that it enters into everything that we take [inside] —not because the water nourishes, but for the sake of the fact that it conducts nutrients and improves their consistency. We said that water does not nourish, because that which nourishes is, in potency, blood and, in a more distant potency - part of a human organ, and a simple body does not
- Hygienic requirements and standards for drinking water quality
The quality of drinking water is the basis of epidemiological safety and public health. High-quality water is an indicator of high sanitary well-being and living standards of the population, provided with centralized water supply. In developed countries, the state and health authorities pay special attention to the quality of drinking water. Drinking water must comply with SanPiN