Ultraviolet water filter

One of the most modern and effective methods of water purification is recognized as ultraviolet treatment. The system is originally from the United States recognized by experts as more useful and safe than other methods. UV filters for water purification have a narrow effect: they are not intended to eliminate various impurities, their goal is to completely disinfect water, saving it from bacteria and other microorganisms. Let's look at what these new devices on the Russian market are, and get acquainted with the rules for their choice.

Ultraviolet filter

Ultraviolet water purification came to Russia from the USA and almost immediately gained considerable popularity. This method is universal, it is able to destroy all types of microorganisms that may be present in water, even those that the chlorination method cannot handle.

The UV cleaning method is completely harmless to humans and environmentally friendly, and the price of filters against the background of analogues is relatively low.

Among other advantages should be attributed to the low maintenance requirements, in contrast to the more usual methods of ozonation and chlorination, which saves money. Maintenance of the system is elementary, and a layman can cope with it.

Advantages and disadvantages of UV filters

Among the advantages of ultraviolet water purification systems are:

• ease and simplicity in service;
• system reliability;
• safety for user health;
• productivity in eliminating pathogenic bacteria and microorganisms;
• availability.

Despite the abundance of advantages, there are a number of disadvantages to ultraviolet filters:

1. After treatment, the water can quickly return to its initial state, that is, become contaminated again.
2. This method is not suitable for very severe contamination, so removing chemicals and cleaning lake or swamp water with a UV filter will not work.
3. Specialists do not recommend using ultraviolet radiation in large treatment systems, since the filter can’t cope with large volumes of water.

Features of work

Despite the presence of many models of ultraviolet filters on the market, in general terms, their operating principle is identical. The filter device includes a water tank in which special nozzles are located. There are also mounted UV lamps, which begin to work when water gets in. After cleaning, water exits through special tubes.

The main role in the filter is assigned to a UV lamp, which, by spreading light, kills pathogenic bacteria and other microflora. Ultraviolet rays contribute to the fact that microorganisms lose their ability to reproduce and die.

Important! With various impurities, such as heavy metals, nitrates and other harmful compounds, UV the filter does not cope, therefore, its use requires mandatory preliminary mechanical cleaning.

Among the main diseases that the filter successfully fights, the following should be highlighted:

• hepatitis;
• flu;
• Escherichia coli;
• cholera;
• typhoid fever;
• salmonella;
• bacillus dysentery.

The key to the quality of the filter is the timely replacement of lamps. Over time, they wear out, reducing the efficiency of the device. The average lamp life is about 1,500 hours, after which a mandatory replacement is required.

The features of the device of ultraviolet filters are such that users can clean their individual departments without removing the device itself. In the operation of the device, human participation is not required - an automatic control unit is responsible for turning on / off the lamp. The lamp is activated immediately, as soon as the water gets inside, most often there is an additional system of indication of possible problems. All this makes UV water filters one of the easiest to use models.

Varieties

Industrial plants are most effective in operation - they also cope with mechanical pollution thanks to special additional filters. This allows the system to work simultaneously with large volumes of liquid, and the number of lamps in the installation can reach 10 or more.

For home use, this scale is not required - a simpler model will suffice. The release of such devices has already been managed by many manufacturers, and the price of UV filters is affordable.

• The main criterion by which models are separated is performance. The higher this parameter, the faster water can pass through the device.
• Another important criterion is the ultraviolet transmittance. This depends, first of all, on the properties of the liquid itself: the more turbid the water, the higher the dose of radiation required.
• Do not forget about power. It should be noted right away: this parameter is selected individually, for a precise determination, a chemical analysis of the liquid is required.

UV filter selection

Today, a wide range of ultraviolet water filters is available on the market. In order not to make a mistake with choosing the right model, you should pay attention to the following indicators:

• types of microorganisms in water;
• water temperature;
• flow rate
• the necessary degree of disinfection.

Let's consider these parameters in more detail.

• To eliminate a specific type of microbe, a certain dose of radiation is required. It is calculated on the basis of special tables. From them, you can find out what dose can destroy all existing types of bacteria and microbes.

• Water temperature is a very important parameter. Among the whole range of UV filters, there are two types of lamps that respond differently to temperature fluctuations. A water temperature of 16–20 degrees is optimal for low-pressure lamps, and medium-pressure lamps are not affected by temperatures up to 85 degrees. If this parameter is exceeded or decreased, it will be necessary to properly control the flow of water.
• Another important indicator is the nature of the flow of water. For the correct filter selection, it is necessary to know the maximum and minimum flow level, since the filter operation adapts to its change.
• Finally, the required degree of disinfection also plays an important role. It all depends on what purpose water will be used for. For example, for drinking water, the degree of purification should be 100 percent. For water used for domestic purposes, absolutely all microbiological contaminants do not need to be removed.