The main problem of any shipwrecked person is the lack of drinking water. Seriously, paradise islands, with abundant fruits and clean springs, are more of an exception than the rule. Most often, you have to survive in much less adapted territories for life. And if you can postpone it for later, then the problem water extraction rises immediately and very sharply.

In fact, there are enough options. You can collect, you can try to dig a "well" on the sandy shore, in which the water, being passed through meters of sand, will turn out to be quite drinkable. Or you can call on your school knowledge of physics to help you and build the simplest watermaker sea ​​water .

So. For water desalination you will need:

• plastic bottle
• large light container
• small dark container
• polyethylene film

Further everything is simple. We bury a large container in the ground to the brim, in it we place a medium dark vessel filled with sea water. And we put a glass or a cut plastic bottle in it, and we try in every possible way so that salt water does not get there. We leave this whole structure in the sun, hermetically covering it with a film. It is also recommended to put a small weight directly on the film above the glass - this will allow the water to drain there. And, in fact, everything. After 8 hours, you will just have a glass of 200 milliliters, on average.

The principle of operation is simple: under the action of sunlight, the dark material heats up, the evaporation of water increases. The polyethylene film does not release water vapor to the outside, and the walls of the large container provide the temperature difference necessary for condensation.

In fact, the recipe is subject to change. Some, for example, advise not to use a large container, but simply dig a hole in the sand and place a dark vessel there. Others prefer to use opaque polyethylene. In short, there are options.

In any case, for effective water desalination one such design will be really not enough. But five or six pieces will already be able to provide you with a daily norm, and they will also free up time for more useful things. The main problem is that the shipwrecked often does not have any property at all, so pots are not discussed at all. In this case, the recipe is transformed and simplified.

Due to the pollution of the world's oceans, plastic bottles and old bags can be found on the coast of almost any island. Dirty, wrinkled, holes in places, but it's better than nothing. Therefore, we dig a hole, throw branches and leaves moistened with sea water to the bottom, and place a cut plastic bottle in the center. On top - polyethylene in several layers. Periodically, water will have to be added.

Theoretically, polyethylene can be replaced with broad leaves, but this substitution further reduces the efficiency of the process. water desalination. In short, there is no need to count on high performance. But that's better than nothing.

The generic contains vardenafil in several dosages, auxiliary components (lactose, cellulose, magnesium stearate, safe dye). The latter make vardenafil more effective, increase its concentration in the body, facilitate absorption and natural excretion.

Manufacturers have carefully considered the composition of the product and the ratio of components, which makes the drug effective and effective without side effects.

Please note: vardenafil is not combined with alcoholic beverages, with such a combination, side effects may occur, and the effectiveness of the drug will decrease. To enhance the effect, it is better to take the pill on an empty stomach or after a light snack.

Generic Levitra is available in the form of round yellow tablets that act on the body of a man as follows:

• activation of blood circulation in the pelvic organs;
• expansion of blood vessels and cavernous bodies of the penis;
• increased blood flow to the penis and head;
• the occurrence of an erection during stimulation of erogenous zones and sexual arousal.

The drug causes an erection only when a man wants to have sex and is attracted to a partner. This means that the physiological reaction of the body cannot occur in public places and in other situations that can cause a feeling of embarrassment.

The main indication is erectile dysfunction and impotence. The deterioration of erection in this case can be caused by the following reasons:

• Chronic stress and nervous strain.
• Poor nutrition, lack of protein, zinc and vitamins in the body.
• Hypodynamia and limited mobility.
• Severe physical fatigue, excessive physical activity.
• Psychological complexes and self-doubt, strong excitement before intimacy.
• Violation of the hormonal balance in the male body, testosterone deficiency.
• The natural decline in testosterone levels as the body ages.
• Diseases of the reproductive system, prostatitis and prostate adenoma.
• Endocrine diseases, diabetes mellitus.

In all these cases, generic Levitra will help restore an erection and give you the joy of sexual life, making you more resilient and self-confident.

After oral administration of tablets, the active ingredients are rapidly absorbed into the circulatory system. When taken on an empty stomach, the maximum concentration of vardenafil can be reached after 15 minutes, however, in general, Levitra begins to act in full force approximately 50 minutes after consumption.

The minimum clinical effect is observed even before reaching the maximum concentration, in most cases the patient can penetrate after 10 minutes.

Generic Levitra is excreted from the body naturally and does not accumulate in the body, as a result of which it is possible to avoid toxic effects on the liver and kidneys, overdose and adverse reactions.

When taken simultaneously with food containing no more than 30 percent fat, the effectiveness indicators do not change. When used simultaneously with fatty foods, the effectiveness of the stimulant may decrease slightly.

If you want the drug to be as effective as possible and not cause unwanted reactions, it is recommended to follow the instructions for use indicated on the package.

In accordance with this instruction, one tablet should be taken 40 minutes before sexual activity, the drug can be washed down with plain water. The dosage is selected individually, depending on the characteristics of your body and the degree of erectile dysfunction. The optimal dosage for beginners is 5 mg. In the following days, if necessary, you can increase the concentration, the maximum amount per day is 20 mg.

As for the cost of the drug in pharmacies, it depends on the pricing policy of the store, the dosage and the number of tablets in the package. The price of generic Levitra in our online pharmacy is quite acceptable: customers can count on favorable discounts and pleasant bonuses. The low cost of the generic is due to the absence of the need to carry out laboratory research and develop the formula of the drug (the finished formula of the original is taken as the basis). That is why you can be sure of the quality and safety of the stimulant for potency.

If you have kidney and liver diseases in the chronic stage, it is recommended to consult with your doctor before taking the generic. Such patients are prescribed the lowest dosage - 5 mg per day. The same applies to men with certain diseases of the cardiovascular system (for example, heart rhythm disorders).

You need to increase the dosage gradually, focusing on your well-being (if you took 5 mg on the first day, the next time you are allowed to increase the amount to 10 mg per day).

For a guaranteed effect right time it is better to take the tablets about an hour before sexual intercourse (a long period of action allows you to do this in advance). Please note: Do not combine Levitra with other herbal and synthetic drugs for potency in order to avoid overdose and serious side effects.

It is not recommended to take the drug with ritonavir, indinavir and other antiviral drugs, otherwise the concentration of vardenafil in the blood may increase dramatically, which will lead to an excess of the allowable dosage.

Levitra should not be combined with alpha-blockers, the result of such an interaction is sharp jumps in blood pressure. When taking psychotropic drugs and antidepressants at the same time, consultation of the attending physician is required. The same applies to drugs for the normal functioning of the cardiovascular system.

Levitra can be taken simultaneously with drugs for the treatment of diabetes mellitus, prostatitis and prostate adenoma.

At the moment, there are many drugs-analogues to combat erectile dysfunction. Many of them contain vardenafil in various dosages. Among the most famous analogues are tablets such as Vardenafil, Vilitra, Super Vilitra, Savitra and other innovative developments that regularly appear on the pharmaceutical market. Many of these drugs you can buy in our pharmacy.

Drugs with other active substances. Viagra, Cialis - these pills also improve blood circulation and dilate blood vessels, which leads to a natural erection.

The exact choice of stimulant depends on your budget, contraindications, and individual features organism. For the most effective choice of the drug, it is recommended to contact a professional sexologist or urologist.

At the moment, there is no special drug for women, which includes vardenafil. The tool is not recommended for girls, since its mechanism of action on the female reproductive system has not been studied.

However, patients can purchase other stimulants to enhance sexual arousal: female Viagra, Silver Fox or Spanish Fly. These pills and drops increase libido, increase the sensitivity of the clitoris and vaginal walls, which guarantees a bright and long orgasm.

Below you will see reviews of patients who have already appreciated the advantages of this stimulant in practice.

Vladimir, Moscow: Great product that helps with my severe erectile dysfunction. Through trial and error, I managed to pick up Levitra, which restores an erection and does not cause side effects (all other drugs had a bad effect on the heart). By the way, I take the remedy several times a week, sometimes I can do just fine without pills.

Vitaly, Nizhny Novgorod: At first I bought 5 mg tablets, but the effect was rather weak, in right moment the potency all the same disappeared (when changed a pose). The next time I increased the dosage to 10 mg, now everything works great! I recommend the remedy to those who want to improve potency without harm to health, it is only important to choose the right amount, and this should be done gradually. I take pills with water or tea, once I drank a glass of wine, there was no deterioration in my state of health.

Oleg, Tver: In the first few minutes after taking the pill, my face burned a little, but then everything went away. A few hours later we had sex with a girl, I have never had such an erection! Endurance in bed also increased, there was a pleasant feeling of a surge of strength. I have no serious problems with potency, but now I sometimes take 5 mg to increase tone and eliminate fatigue.

Reviews about Levitra are mostly positive, patients note the effectiveness and safety of the drug. You can often find negative reviews associated with an incorrectly calculated dosage or an acquired fake.

There are several reasons why a drug may disappoint a patient:

• Individual intolerance to the components. If an allergic reaction occurs, you will not be able to get an erection. In this case, it remains only to consult a doctor to relieve symptoms or use modern antihistamines, and then choose a new stimulant.
• Lack of attraction to a partner. If you do not want to have sex with your partner, she does not attract you outwardly or for any other reason, Levitra will also be powerless.
• Wrong dosage. With severe violations of erectile function, a concentration of 5 mg may not be enough for potency and full penetration.
• Buying a fake and low-quality drug. To avoid such an unpleasant situation, it is recommended to buy generic Levitra only in a trusted online pharmacy.
• Abuse of fatty foods and alcoholic beverages. Levitra and a plentiful feast are two incompatible concepts, moreover, such abuses lead to liver diseases.

Below are the main questions that are often asked when choosing and buying these pills:

1. Can I take Levitra with diabetes if I have problems with potency? It is possible and even necessary. Levitra restores erection in case of endocrine pathologies and gives joy from sexual life even in severe chronic diseases.
2. Is it acceptable to take a generic if I have tachycardia? There is no direct contraindication in this case, however, a rapid heartbeat can be the cause of dangerous cardiovascular diseases. That is why, with a fast pulse, a preliminary consultation with a cardiologist and an accurate diagnosis are required.
3. What happens if you take Levitra with alcohol? In this case, the rate of absorption of the active component into the blood will slow down significantly, with a large amount of alcoholic beverages, serious intoxication of the body and an increase in blood pressure may occur, which will require urgent medical intervention.
4. Can the generic be taken daily? Yes, you can do it every day at prescribed dosages as the stimulant is not addictive. You can mark a drug at any time.
5. Can Levitra increase the duration of sexual intercourse? The drug affects only the erection. If you suffer from premature ejaculation, you can take this generic drug in dapoxetine at prescribed dosages.
6. Does generic Levitra differ from the original drug? The differences relate only to the design of the packaging and the shade of the tablets, the effectiveness of the analogue stimulant and the original is the same.

Here are some of the advantages of the drug:

• Affordable cost and discounts from our online pharmacy. Thanks to this, every member of the stronger sex can afford to live a full sexual life.
• Guaranteed effect. The drug helps even with severe erectile dysfunction.
• Safety and not a large number of side effects. The stimulant can be taken by all healthy men who do not have allergic reactions.
• Levitra does not affect reproductive function, so long-term use will not affect conception and sperm activity.
• Long period of action. You can take one tablet and forget about it for 12 hours: the drug will work all this time. This is very convenient before a romantic date, when you do not know at what point intimacy will occur.
• Increase endurance in bed. Levitra makes a man sexually active, which means that he can have sex several times in a row without feeling tired.
• Increasing the sensitivity of erogenous zones, in particular, the head of the penis. Thanks to this, the sensations during sex will become even stronger and brighter!
• Levitra can be taken in old age, which will allow you to show the qualities of a great lover even after 50 years.
• The possibility of regular use without the development of addiction to the components of the drug.
• The ability to take Levitra with other medicines (after consulting with a specialist).

Thus, generic Levitra is a drug for the treatment of impotence and erectile dysfunction caused by stress factors or health problems. Fast onset of effect, long-term effect and safety are the hallmarks of this stimulant.

Despite the balanced and safe composition, this potency stimulant has several contraindications that must be considered before starting treatment. These are the restrictions:

• Hypersensitivity to the main or auxiliary components of the generic. Individual intolerance can lead to serious allergic reactions.
• The patient's age is up to 18 years. At the moment, there are no results of studies on the effect of vardenafil on the immature reproductive and other systems.
• The drug should not be taken by women, especially during pregnancy and lactation, since vardenafil may adversely affect the development of the fetus and change the composition of breast milk.
• Congenital or acquired deformities of the penis, injuries. In this case, severe pain is possible when an erection occurs and the condition worsens.
• Reduced blood pressure.
• Predisposition to develop priapism.
• Severe diseases of the cardiovascular system (myocardial infarction, stroke, cardiac decompensation, heart defects).
• Increased tendency to bleeding, including gastric ulcer in the acute stage.
• Diseases of the liver and kidneys in the terminal stage.
• The elderly age of the patient (it is not recommended to take Levitra over the age of 75 years).

If you have any chronic diseases, it is recommended to consult with your specialist before prescribing the drug. In some cases, medical examinations are required.

With a correctly calculated dosage and compliance with the rules of use, side effects are extremely rare. Common occurrences include the following:

• flushing of the skin, due to improved blood circulation in the body;
• rapid pulse;
• short-term increase in blood pressure;
• manifestations of an allergic reaction (rhinitis, lacrimation, itching and rash on the skin, swelling);
• pain in the abdominal cavity, diarrhea and other stool disorders.

Most side effects are short-term and disappear within an hour after taking the drug. If pronounced symptoms persist for a long time, it is recommended to contact a specialist who will detoxify the body, recommend to stop taking the drug or adjust the dosage.

If the maximum allowable dose is exceeded several times, dizziness up to fainting, nausea, which turns into vomiting, a strong increase in blood pressure and signs of food poisoning, are possible.

In such a situation, it is necessary to take advantage of urgent medical care, take measures to cleanse the body and symptomatic therapy.

Buy this stimulant in our online pharmacy at a low cost! We have high-quality and inexpensive generics for erection in various dosages.

The store has a favorable delivery in Moscow and other cities of Russia, delivery is possible by mail or courier service (in Moscow and St. Petersburg). Please note: all generics have certificates, which confirms their proper quality.

To order generic Levitra, call us by phone or leave a request on the pharmacy website. If you have any difficulties with the choice of goods and placing an order, ask our consultant. Employees will talk about the features of the tablets, dosage, rules of use and effect.

Cooperation with customers is carried out on the principles of anonymity, so strangers and your loved ones will not know about the purchase (tablets are delivered in opaque packaging). We offer you honest cooperation on transparent terms!

Life can bring many surprises. And not always pleasant. We hope you don't find yourself stranded on a deserted island or in the middle of the African desert with no access to drinking water. But, nevertheless, we advise you to learn how to desalinate sea water using improvised means. Would it come in handy?

The method described below is very popular among fans of life hacks for survival. And for good reason: the process is simple, it does not require much “inventory” and relatively little time. If you start the distillation process at dawn, by noon the sea water will be drinkable.

To desalinate sea water and make it drinkable, you will need:

1. Bucket, bowl or saucepan;
2. Dark container (black color more effectively attracts solar heat and heats up);
3. A glass or a plastic bottle without a throat;
4. Film, plastic bag or cap;
5. Sunshine

Step 1

Place a dark container in a large bowl or bucket.

Step 2

Place a glass or plastic bottle with a cut neck in the middle of the structure.

Step 3

Fill the black container with sea water. Make sure it doesn't hit the glass in the middle.

Step 4

Cover the entire structure with a film or a tight lid. Tightness is everything. If you are using a film, in the center, directly above the glass for desalinated water, put a stone or other weight.

Step 5

Leave your distillation apparatus in the sun and wait. For 8-10 hours under the film in conditions of artificial “heat”, sea water will evaporate, turn into condensate and fall directly into a glass in the form of fresh “precipitation”.

Water- the source of life for all living things, but you need to distinguish which water is useful and which is not. Approximately 99% of all the waters of the earth is the water of the oceans and seas, that is, salt water, is unsuitable for consumption. Many people in the world need living, fresh water, and today we will tell you how to get fresh water from salt water.

How to make fresh sea water at home?

Fresh water differs from salt water in the amount of salt and other chemical elements. The most popular way is to separate salts from water by distillation.
This method consists in heating water to the boiling point, and collecting vapors in the form of condensate. This method is well described in the article - .

There is also another way, the so-called - desalination. It consists in the fact that salt water is passed through a membrane that can only pass pure water without salt components. But this type of purification is not very effective, since the membrane passes a very small amount of water over a long period of time.

Issues discussed in the material:

• Why is there a need for seawater desalination?
• What are the methods of desalination of sea water
• How to desalinate sea water at home
• What problems are inherent in the process of seawater desalination

Purification and desalination of sea water is an industrial process, as a result of which salts are removed from it and a product suitable for domestic use and consumption is obtained. Our article will tell about the methods and technologies of seawater desalination.

60% of the earth's surface consists of territories where there are either no sources of fresh water at all, or there are, but a very small amount. Since there are few freshwater reservoirs in many arid areas, there are problems with watering the soil. They could be solved thanks to the possibility of using desalinated sea water for these purposes. There are significant reserves of such water on Earth, but due to the high salt content, it cannot be used for economic purposes.

To grow crops, it is necessary to water them with water with a very low salt content. If plants receive more than 0.25% salts with moisture, they simply will not grow. Also, the presence of alkalis in the water will adversely affect them. Many states, including Russia, are looking for ways to desalinate salty water sources, which would help to cope with drought problems in areas located near the sea.

In countries with a well-developed industry, there is an increasingly acute shortage of fresh water reserves. In particular, this applies to the USA and Japan, where the required for industry, Agriculture and household needs, the volumes of water have long exceeded the available ones.

The amount of fresh water does not meet the needs in developed countries with low level rainfall, such as Israel and Kuwait.

Russia occupies the first place in the world in terms of terrestrial freshwater resources. Baikal alone is enough to satisfy the current need of the Russian population and industry for fresh water. This lake is so deep that if you direct the flows of all the rivers of the globe into its basin, then it will fill up for almost 300 days.

However, most of Russia's water resources are concentrated in practically uninhabited and undeveloped areas of Siberia, the North and Far East. The highly developed central and southern regions with a high level of industry, agriculture and population density account for only 20% of freshwater reserves.

Certain countries Central Asia(Turkmenistan, Kazakhstan), as well as the Caucasus, Donbass and the southeastern part of the Russian Federation, have huge mineral and raw material resources, but they do not have freshwater sources.

In Russia, there are a large number of underground sources, the mineralization level of which ranges from 1 to 35 g/l. They cannot be used for the needs of the population, as they contain a large amount of salts, but after desalination they can be used quite well.

In the process of desalination of sea water, an important parameter is its salinity, which refers to the mass of dry salts in grams per 1 kg of substance. The amount of salts per unit volume of liquid can vary significantly depending on the sea. For example, the Black, Caspian and Azov Seas are characterized as slightly saline. The average salinity of the World Ocean is 35g/kg.

Except table salt(NaCl), sea water also contains a number of other chemical elements, mainly in the form of ions that can be obtained from it on an industrial scale: K+, Mg2+, Ca2+, Sr2+, Br-, F-, H3BO3. In total, about 50 chemical elements in various concentrations have been found in the subsoil of the sea, including lithium (Li), rubidium (Rb), phosphorus (P), iodine (J), iron (Fe), zinc (Zn) and molybdenum (Mo).

Marine water resources contain more than 50 chemical elements. The concentration of each of them is extremely small, but their total mass determines the salinity of the liquid. Only water containing no more than 0.001 g / ml of salts can be suitable for food. In order to achieve such a concentration, various seawater desalination technologies are used. Specialists are trying to develop desalination systems that would consume little energy, but at the same time purify water as much as possible for use by the population.

Today, the following methods of seawater desalination are used: distillation, reverse osmosis, ionization and electrodialysis.

AT southern regions Solar distillers are actively used, in which sea water is heated and evaporated. There is also an opposite method, in which salt water is frozen and then fresh water is separated from it, since it freezes faster.

A sea water maker is a device that can remove salts dissolved in water from water. After the purification procedure, water is obtained, which can be used not only for household needs, but also for drinking. The design of the device is distinguished by convenience and practicality in operation.

However, desalinated water is not clean at the same time, because other components are also preserved in it, the density of which determines the area of ​​its application. So, on sea vessels, different types water reserves:

• drinking, which is used only for cooking and drinking;
• water for personal hygiene and deck washing;
• water for steam generators, or feed water;
• technical water, which is used as a coolant for engines;
• distilled water.

To obtain all these types, different ship distillers are used.

Desalination technologies include the following:

1. Distillation, in which the desalinator heats and evaporates sea water. The resulting steam is "caught" and brought to the required temperature.
2. Filtration, in which the device works on the principle of reverse osmosis. Salt water is purified without going from one state to another. The operation of such an apparatus is based on bringing the concentration of dissolved impurities to the optimum. Very high pressure allows you to "squeeze out" excess salt particles.

In the Israeli city of Hadera, there is the largest distiller on the planet. This unit is commensurate in size with the whole plant. Every year it desalinates about thirty-three billion gallons of sea water. The distiller works on the principle of reverse osmosis, as a result of which the Mediterranean waters are not subjected to heat treatment.

The installation is completely hermetic, it creates the effect of a greenhouse, while no leakage of fumes to the outside is allowed. As a result, the net water residue is retained in more. At the end, the cork is unscrewed, and the purified liquid is drained into a container.

Similar devices are used in navy. They use the heat of the liquid, which serves to cool the main and auxiliary diesels. Purified water, heated to 60 °C, enters at the inlet through the pipes of the heating battery. When leaving the liquid, the temperature of the liquid drops to about 10 °C.

Vacuum maker produces about 800 liters of distilled water per hour. It can meet all your fresh water needs without wasting fuel energy, and full automation saves maintenance costs. Since the evaporation temperature is quite low, the water maker can operate for six to twelve months without requiring cleaning.

It is known that the population of Israel suffers from a serious shortage of drinking supplies. The operation of the apparatus described above makes it possible to cover almost two-thirds of the water demand of the whole country.

Today, a wide variety of equipment is used to desalinate sea water, including unique desalination plants powered by solar energy. Water is poured into them, which, under the influence of solar heat, turns into steam, condenses on the walls of the case and then settles in the lower part of the device.

To date, two methods of desalination are widely used in industry: membrane (mechanical) and thermal (distillation). In the first case, reverse osmosis technology is used. Sea water is passed through semi-impermeable membranes under a pressure significantly exceeding the pressure difference between fresh and sea water (for the latter it is 25-50 atm.).

The microscopic pores of the filters freely pass only small water molecules, retaining larger ions of salt and other impurities. The material for such membranes is polyamide or cellulose acetate, they are produced in the form of hollow fibers or rolls.

The method of deep reverse osmosis water desalination has a number of advantages compared to other methods. Firstly, the devices are simple and compact, and secondly, they do not require large amounts of energy. In addition, the reverse osmosis system is controlled in semi-automatic and automatic modes.

However, this method also has its drawbacks. The quality of cleaning here depends on how effective the pre-treatment was. In addition, the resulting drinking water still contains a fairly large amount of salt (500 mg/m3 of total salt concentration). Also, this method requires increased operating costs, since the regular purchase of associated chemicals and the replacement of membrane filters are necessary.

Wonthaggi Desalination Plant is the world's largest membrane filter desalination plant located in Melbourne. It is capable of processing 440 thousand cubic meters of water per day. In the Israeli city of Ashkelon, there is a plant where water is purified from salts by reverse osmosis. It processes 330 thousand cubic meters of water per day.

The essence of the thermal method (distillation) is that liquid is boiled at the seawater desalination station, and the resulting steam is accumulated and condensed. This forms a distillate - fresh water. You can also boil water without bringing it to a boil. In this case, it is heated at more high pressure than in the evaporation chamber. The heat of the water itself is used to form steam. At the same time, it is cooled to the saturation temperature of the remaining brine. The disadvantages of this method are the cost, high energy consumption, the presence external source pair. However, it is he who gives the largest volume of fresh water per unit of time. For example, the Shoaiba 3 plant ( Saudi Arabia) produces up to 880 thousand cubic meters of fresh water per day using the distillation method.

The two methods can be compared in several key ways:

Options	Reverse osmosis	thermal method
Physico-chemical principle	Membrane diffusion	Thermal evaporation and condensation
Energy Consumption (Including the consumption of auxiliary devices)	Electricity: 3.5-4.5 kWh/m3	Electricity: 2.5-5 kWh/m3, thermal 40-120 kWh/m3
The highest temperature in the desalination process	sea ​​water temperature
Water quality (salt content mg/l)
Average productivity of one desalination module	6000-24000 m3/day	120000 m3/day
Main Devices	Pumps, membranes	Pumps, valves, vacuum systems
total cost
Level of production automation
Ability to change the composition of sea water		medium-high
Maintenance Requirements
Scaling Potential		Medium-low
Space Requirements
Most Needed Improvements	Improvement of water pre-treatment, improvement of membrane properties	Cheaper materials and heat transfer methods

Difficulties with fresh water supply arose in Crimea after the well-known events in 2014. Then Ukraine blocked the channel through which fresh water was supplied to the peninsula, resulting in a shortage of technical and drinking water reserves.

There is information about the planned installation of a desalination system in Kerch, which will produce about 50 tons of water per hour. Water resources purified from salts will be used mainly for technical needs: feeding heating networks and steam boilers. This will help reduce the burden on the public water supply.

Water purification at this plant will take place in several stages. For clarification, it is supposed to use a combined membrane technology, for purification from salts - a reverse osmosis method, for polishing softening - an ion-exchange method.

The system will work in automatic mode, only one operator is needed to control the process.

Today, the profitability of irrigating crops with desalinated sea water is a big question: unfortunately, existing technologies do not allow obtaining both high-quality and cheap fresh water from salt water. But different countries of the world are constantly working in this direction, because ecological problems desalination of sea water concerns all mankind and requires permission.

Scientists have high hopes for the use of atomic energy to clean water resources, which would make desalination technologies much cheaper.

Do-it-yourself seawater desalination at home and in extreme conditions

If you need to purify sea water from salts during a hike, a home-made distiller is best suited for this, similar in design to well-known distillation apparatus.

The essence of the process in a conventional desalination plant is as follows: the salty liquid is heated to a boil, then the resulting steam is accumulated in a container and cooled. After the procedure, chilled droplets of water, purified from salt impurities, settle on the walls of the chamber.

Salts stand out from the mixture because the boiling point at brine slightly higher than pure water. Therefore, the fresh component evaporates faster and settles into the collection container.

To desalinate sea water in field conditions, you will need:

• first of all - the water itself, which is always in abundance on the coast of the sea or a salt lake;
• a kettle or kettle as a container for heating;
• an aluminum tube, which should be prepared before the start of the trip;
• a deep hole dug in the sand: it will serve as a cooling device;
• another container (glass bottle, stainless steel jar, etc.), where water purified from impurities will be collected.

On the shore of a lake or sea, you should dig a hole up to a meter deep, place a container (bottle) in it at a slight angle, into the neck of which you need to insert a tube.

Prepare a rubber gasket in advance: with its help, you will securely seal the junction of the aluminum tube with the neck of the bottle.

Then the structure should be covered with sand in such a way that only top part neck with inserted tube. The end of the tube will need to be placed over a kettle or open kettle of sea water. In this case, the fire is bred at a small distance from the bottle with the tube.

After the fire flares up, the water in the container will warm up and begin to boil, and the steam will gradually spread through the tube into a bottle buried in the sand, where it will settle like condensate. Gradually, up to 200-300 grams of pure fresh liquid is formed at the bottom of the container.

by the most in a simple way to purify water from salt at home is the use of a system consisting of a number of filters connected in a certain sequence. But even a complex multi-stage combination cannot remove absolutely all harmful impurities from the water. Therefore, long-known home desalination methods are very popular among the people.

For example, water is poured into a bottle and placed in a freezer, where after a while the pure component freezes. The part that does not freeze just contains all the harmful impurities, so it is drained. The frozen water residue, when it melts at room temperature, can be used for drinking and other needs.

There are two more ways to purify salt from water that can be easily implemented at home. The first is long boiling, as a result of which salt settles on the walls in the form of scale. The second is activated carbon filtration. In this case, the amount of material used will depend on the salt concentration.

Today, of all desalination methods, reverse osmosis technology is the most in demand. But its use requires high costs for the production and operation of membranes, as well as significant energy capacities. In addition, after desalination in this way, a highly concentrated salt solution remains, which is returned to the sea or ocean, which increases the salinity of water resources. Because of this, the purification process becomes even more complicated, and the cost of seawater desalination only increases every year.

In addition, only 1/3 of the world's freshwater resources are in the soil (2/3 are frozen in snow covers and glaciers). And they are used by man so quickly that nature does not have time to make up for the lost.

In this regard, the scarcity of fresh water is increasing on a global scale.

Experts predict that by 2030 more than two billion people will experience water shortages. This problem is exacerbated by the fact that each country uses different volumes of fresh water.

For example, an American consumes on average about 400 liters per day, while a resident of an underdeveloped country consumes only 19 liters. Half of the world's population does not have running water at all in their homes. All this will one day lead people to pay special attention to the oceans as sources of water.

The main challenge in seawater desalination is to minimize energy and equipment costs. This is especially important because a country that needs more purified water must also withstand economic competition with countries that have cheaper and more abundant freshwater sources.

According to the results of design development, it turns out that only for a small number of consumers it will be cheaper to transport water from a natural reservoir over a distance of 400-500 km than to desalinate it. Estimating underground reserves of varying degrees of salinity in arid regions, we can conclude that desalination is the only economically viable way of water supply for them, given their remoteness from freshwater sources of natural origin.

The desalination methods used today can be productively used to return used water resources to nature without worsening the condition of fresh water bodies.

If the water quality leaves much to be desired…

problem dirty water in the house can be partially solved by installing a high-quality filter, but in such systems it is periodically necessary to replace components, because it directly depends on how well the drinking liquid will be cleaned.

At the same time, the question remains unresolved: how to ensure that our workplace or the child at school has water. best quality? The best solution is to buy it with delivery.

The Iceberg company offers favorable conditions for servicing its customers:

• free delivery of water to your home or office: buyers pay only the cost of the goods;
• wells from which our water is drawn have registration documents in the State Water Cadastre of the Russian Federation;
• for the extraction and bottling of water, advanced technologies are used, which helps to preserve and increase its quality and natural purity;
• we also sell modern water coolers and other equipment manufactured by well-known European brands, taking into account existing quality standards. The sizes of pumps and racks for bottles vary, allowing you to install devices even in small rooms;
• delivery of drinking water to your home or office is carried out at the lowest price, thanks to constant promotions from our company;
• along with water, you can purchase disposable tableware, tea, coffee and other auxiliary products.

Clean water is valuable, but it should not be worth its weight in gold. Our mission is to provide every home and workplace high-quality drinking water, so we have prepared the most favorable conditions for our customers.