Ultraviolet water disinfection: principle of operation, installation. Drinking water - standard acting

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2018-03-18 21:11:12

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Today, innovative technologies allow to produce high quality water purification from various contaminants on a large scale. In this population, production and technical facilities are provided with liquid high quality. In the water treatment process used different methods. They allow you to meet all the requirements of the current GOST.

One of the most successful techniques today is Ultraviolet disinfection of water. This approach is successful in fighting with certain types of contaminants, allowing the processing liquid on a large scale. The essence and effectiveness of this method, its advantages and disadvantages will be discussed later.

General characteristics

Today, Water disinfection by ultraviolet radiation is a popular technique that is used in combination with other types of cleaning. The treatment is carried out everywhere. This is the primary stage of water disinfection. It allows you to get rid of harmful microorganisms in the liquid.Ultraviolet disinfection of water

In the process of applying this reagent-free method, the water is irradiated with ultraviolet light of a particular spectrum. Is electromagnetic radiation, whose wavelength may range from 250 to 270 nm. It should be noted that the ultraviolet part of the spectrum include the rays, which are in the range from 10 to 400 nm. Modern installations, allows you to disinfect water, produce radiation with a wavelength of 260 nm. In this case, the liquid is not only cleaned, but also softened.

When using this approach and other techniques. This can be a Chlorination of water And hypochloraemia. Presents processing stage is required according to GOST when cleaning liquids.

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The Principle of operation of the method is based on the ability of ultraviolet light to penetrate cell membranes, destroying their DNA and RNA. She loses the ability to divide. The presented method allows to eliminate the negative impact on the human body of germs and bacteria that are in the water. The strength of the impact depends on the duration of exposure. There are certain standards of conduct such decontamination.

The Standards and requirements

There are certain standards and rules that apply when cleaning and research of water quality. They koordiniruyutsya service actions that carry out the decontamination of liquids. Such normative documents include guidelines MU 2.1.4.719-98, approved by the Ministry of health of the Russian Federation and the Current GOST “Water” R 56237-2014.Disinfection of water by ultraviolet radiation

The normative documents reglementary the procedure of water purification using ultraviolet.

Presents guidelines describe the characteristics of the minimum dose, which is used for drinking water. The figure is 16 MJ/cm². Studies conducted by scientists showed that when the intensity of the treatment in the water greatly reduced the number of pathogenic bacteria. The figure is 5 orders of magnitude. The number of viruses this treatment is reduced by 2-3 orders of magnitude.

Existing standard “Water” reglamentary the order of interaction of all services that provide the processing liquid. The standard specifies the basic requirements for measuring the quality and cleanup. So, according to this document, drinking water qualities must meet the sanitary and hygienic requirements. It can be used to meet drinking and domestic needs. When using such a liquid can produce products for human consumption.

Efficiency

To have Clear water it is not enough to use only ultraviolet irradiation. There is a set of procedures that is able to demonstrate the highest treatment result. Only after doing so, you can get drinking water.Pure drinking water

The Effectiveness of ultraviolet disinfection has a number of conditions. To get the highest quality of the final result, it is important to choose the right dose for fluid handling. Its effectiveness depends on the intensity and duration of treatment. Various microorganisms to a greater or lesser extent resilient to such impacts. For bacteria the radiation dose may be less. For viruses such processing has a lesser impact. It should be noted that the most resistant microorganism such treatment is Escherichia coli. Therefore, before processing to determine the presence of bacteria in the water.

Also when calculating the dose is determined by the total number of bacteria and germs that are in the liquid.

Also of great importance are the quality of the irradiated water. It may contain different amounts of impurities. Clean Clear water easier to disinfected than cloudy liquid. This is explained by the degree of passage of the water into layers. Below are the treatment was effective, the substance must be determined is less than the maximum allowable number of impurities.

Standards and guidelines provided, what amount of iron, larger particles of pollutants, as well as the category the color of the water should be liquid. If these figures are too high, treatment will be ineffective. These tiny particles as a shield, can hide some of the bacteria, viruses. So in the processing, they will not die. Energy costs will be useless. Before disinfection, the water is cleaned from impurities of iron.

Advantages

Knowing the Principle of operation UV disinfection of wastewater, it should highlight a number of advantages of the presented method. The procedure refers to the most pure approach. Is in the water does not add any chemicals additional substances. The negative impact of ultraviolet radiation on the human body can only be with prolonged exposure. This type of disinfection does not change the chemical and physical properties of the liquid. This eliminates even the indirect effects on the body.drinking Water GOST active

The advantages of the method as well as its versatility. It is effective virtually all microorganisms. Also it is quite economical method. It is used in most cases disinfection. In the presence in water of E. coli or other resistant to ultraviolet radiation microorganisms used ozonation. This approach is more expensive.

Time exposure of the liquid does not exceed a few seconds. It provides immediate effect for this impact. There is no danger of exceeding the dosage. The water can be irradiated indefinitely. Moreover, its physical and chemical qualities are not changed. The effectiveness of treatment with prolonged exposure.

The disinfection of water by ultraviolet radiation it is possible to significantly reduce the number of reagents that are applied after the irradiation. Also, this method does not require high energy costs, compared to, for example, by ozonation. So it is used everywhere.

Disadvantages

Clean water is obtained during the processing of a fluid by different methods. The lack of UV radiation is the inability to have an impact on all organisms. Some of them have a high resistance to UV light. If these bacteria or viruses in large quantities contained in water, it is treated in a different way.clear water

Also, one of the disadvantages of the method are the need to control iron levels. The liquid should contain a variety of suspended particles of pollutants. Otherwise, the treatment will be ineffective. The higher in the water particulate impurities of sufficiently large size, the worse the final outcome will be processing.

To install, running water disinfection with ultraviolet light, was able to perform the procedure with high efficiency, the method involves pre-cleaning. This allows to remove from water impurities, coarse particles of pollutants. Also after the procedure you need to carry out Chlorination of water.

The Action of ultraviolet installation is a one-off. This ensures that after disinfection in the water again, there are various bacteria and viruses. Because of their disadvantages are the method most often used in combination with other methods. However, in the absence of water other pollutants, ultraviolet light can be used as a standalone approach. Disadvantages this method can not cover his dignity.

Disinfectant device

The Installation of UV disinfection of water is no different high complexity of the design. It makes the equipment easy to operate, reduces the likelihood of breakdowns. The design of the system has the form of an elongated tube of metal. Inside it is a UV lamp. Also, all models have quartz covers. Are installed in the lamp.Disinfection of drinking water

The construction is simple. Water goes in the installation. It runs with internal...


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Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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