Practical work - acquaintance with the properties of water. What determines the taste and smell of water. The first thing to pay attention to is Learning new material

The organoleptic properties of water include such indicators: smell, taste (taste), turbidity and color of water. In this material we will talk about the first two indicators of taste and smell. In addition to the fact that these indicators are decisive in the aesthetic aspect, they can indirectly indicate the presence of certain contaminants in the water. The smells and tastes of water are a sign of the content of certain substances in it that cause these phenomena: dissolved salts, various chemical and organic compounds. Please note that these parameters are evaluated on a five-point scale, which is shown in the table below.

It is worth noting that odors are assessed for water of any origin. For water that is obviously contaminated with harmful impurities, such a determination is not made.

Evaluation of odors and tastes of water

	Intensity of smell or taste	Intensity characteristic
		No odor or taste sensation
	Very weak	A smell or taste that is not detectable but detectable in the laboratory by an experienced analyst
		A smell or taste that does not attract the attention of the consumer, which can be detected if you pay attention to it
	Noticeable	A smell or taste that is easily detectable and gives rise to disapproval of water
	distinct	An odor or taste that attracts attention and makes the water unpleasant to drink
	Very strong	The smell or taste is so strong that it makes the water undrinkable

Why does water smell bad and how to deal with it?

Smells putrid, fishy, ​​or earthy

Most often found in water from open reservoirs. Due to the presence of natural organic compounds in water. Of these natural compounds, geosmin and 2-methylisoborneol are best known. These compounds are most often safe for humans, although they can sometimes be due to the presence of blue-green algae and bacteria in the water. The water is most strongly enriched with such compounds during the flowering period of reservoirs.

The smell of chlorine

It is found mainly in the central water supply. Caused by heavy chlorination of water at municipal wastewater treatment plants.

Removal: activated carbon filters (adsorption), for drinking - household reverse osmosis.

The smell of rotten eggs

The presence of dissolved hydrogen sulfide (H 2 S) in water. Less often - the presence of sulfide bacteria that produce hydrogen sulfide. Tap water smells like rotten eggs if it is obtained directly from wells without further purification.

Removal filters loaded with Centaur (activated carbon - catalytic oxidation and adsorption) or MGS (manganese green sand). Water chlorination is necessary to remove bacteria.

Chemical smell, phenol smell

This type of odor is due to the ingress of wastewater into the water supply system or into the aquifer (in the case of groundwater intake).

Removal of activated carbon filter (adsorption).

Other unnatural odors

They are caused by the ingress of domestic and industrial wastewater and other human waste products into water bodies and underground aquifers.

Removal eliminates the cause of these substances entering the water. In some cases it is possible to use activated carbon filters (adsorption).

Salty taste

Due to the increased content of salts in water: NaCl, NaSO 4, MgSO 4.

Demineralization of water (deionization or reverse osmosis). For drinking - domestic reverse osmosis.

metallic taste

It speaks of an increased content of iron and / or manganese in the water. At very high concentrations, tap water smells like iron.

Removal: BIRM, MGS and other iron removal methods.

Alkaline taste

Due to the high alkalinity of the water.

Removal: reverse osmosis or deionization systems (H-cationization). For drinking - domestic reverse osmosis.

In the table below, we provide a more detailed classification of odors with an indication of their origin.

Characterization of all flavors and odors

Characteristics of taste or smell	Reason for the appearance
Flavors without odors
brackish	Brackish-tasting water often contains sodium chloride
	magnesium sulfate or sodium
bitter, astringent	sulfate iron and aluminum, excess lime
bitter, metallic	Iron-tasting water usually contains ferrous sulphate, manganese, and copper.
	sodium carbonate
sweetish	bicarbonate soda
peaty or vegetable	humic acids
tasteless, sluggish (weak)	lack of dissolved oxygen, hardness salts and high temperature (warm water)
astringent, irritant, causing itching and dry mouth	The presence of styrene - this water cannot be used for drinking
Odors without flavors
hydrogen sulfide	hydrogen sulfide in well water
the smell of oil and paraffin	The presence of oil products in water, such pollution can be of both natural and industrial origin.
Flavors combined with odors, natural or existing prior to processing
earthy	the vital activity of radiant fungi in river water, especially common during periods of floods
smells of geranium, violet, cucumber, nasturtium, fish, pigsty	indicate the overgrowth of the reservoir with blue-green algae
smells of weeds, earthy, grassy, ​​musty, moldy, rotting plants	rotting plants in ponds or structures
smells phenolic, aromatic, chemical products	Water with a sour taste, with hints of chemicals, is subject to pollution by effluents from industrial enterprises
Tastes and odors acquired as a result of water treatment
moldy smell	formed due to chlorination of water rich in algae
chlorophenolic (medicinal), iodoform, chemical products	consequence of chlorination of water containing industrial effluents
smell of chlorine	chlorination of relatively pure water
Tastes and odors in pipelines
resinous, naphthalene	leaching of resinous substances in new water pipes and other structures
creosote, fish	consequence of pollution by industrial effluents
tasteless, lethargic	formed during prolonged settling of water in tanks, containers
	often the result of the location of hot and cold pipelines side by side
unpleasant aftertaste and putrid, vegetable smell	talks about the reproduction of aquatic organisms in tanks and other waterworks

For drinking and household needs, only clean water should be used. With centralized water supply, these tasks are handled by specialists. If there is a specific smell of water from the well, giving off a swamp or hydrogen sulfide, the master must personally take action. Otherwise, such a liquid with a cloudy coating on top and amber is unsuitable for use.

Causes of Bad Smell

The unpleasant smell of water from the well is a sign of vital activity of microorganisms

The main reason for the appearance of marsh stench from water is the decomposition of organic substances in it, their decay. The above substances get there in this way:

• Together with particles of sand seeping into the casing. When the bottom of the source is silted, the growth of organic substances in the water increases.
• Through the unprotected top of the well/well. Small debris, insects, small specimens of the fauna (bat, bird) may well fall into the column.
• Low intensity of operation of the source. Stagnant water in it leads to the formation of a layer of silt from the bottom. This can cause a swamp stink.

In all three cases, in the lower layers of the well, processes occur in which anaerobic (living without oxygen) bacteria actively develop. They also provoke the appearance of a marsh smell.

Such a liquid foams strongly when boiled.

Can you drink scented water?

At least a sharp repulsive aroma simply does not allow a person to eat such a liquid. But even if you boil it and thereby eliminate the rotten smell, the water is undrinkable. A liquid enriched with hydrogen sulfide threatens with the following consequences:

• indigestion and as a result diarrhea, vomiting;
• serious food poisoning;
• headache;
• convulsions;
• nerve paralysis;
• pulmonary edema.

The presence of hydrogen sulfide in water greatly complicates the process of iron removal. Therefore, if the master has special filters for the well fluid, they will not cope with divalent Fe in the presence of third-party gas. However, they will wear out very quickly.

Ways to solve the problem

When well water smells like sewage, a number of actions should be taken to eliminate the amber. For this purpose, the cause is first identified. Then the source is thoroughly pumped with a powerful water pump. It is desirable drainage, since there is a possibility of pumping a thick sandy mixture from the bottom of a home source. If necessary, change the bottom filter.

If the reason for the entry of organic matter into the casing string is a depressurization of the pipe, it makes sense to mount a narrower polymer barrel into it. Often masters correct the situation in this way.

Physical methods of water purification

An aerator installed in the well prevents water stagnation in the lower layers, preventing the development of sulfur bacteria

Aeration is the saturation of the liquid from the well with oxygen. If anaerobic microorganisms actively live and multiply without it, the enrichment of water with the desired gas will lead to the neutralization of active processes. The smell of hydrogen sulfide will go away.

Air handling units are of two types:

• Pressure. Oxygen is supplied to the column under pressure. There is a so-called enrichment of water. As a result, hydrogen sulfide is displaced and escapes. The gas is often removed by this method at industrial treatment plants or in home aerator flasks.
• Non-pressure. The liquid is poured into the storage tank, as from a standard watering can in the bathroom. When water is enriched with oxygen, hydrogen sulfide is separated from its molecules and escapes into the atmosphere. After the aeration process, ferrous iron precipitates in parallel, acquiring a trivalent form. Oxygen-enriched water can be fed into water pipes.

The main advantages of aeration are that no dangerous chemicals are used to purify the liquid, and the method itself costs almost nothing to the owner of the source.

Chemical odor removal

Water purification by ozone

If the water in the well smells like a swamp, special reagent chemicals can be used. When they come into contact with sulfur molecules, the latter lose their activity. As aggressive substances use:

• hydrogen peroxide;
• chlorine - its interaction with hydrogen sulfide molecules leads to the formation of colloidal sulfur, which is later removed by coagulation;
• ozone - leads to the formation of an insoluble precipitate and further improves the taste of the liquid;
• sodium hypochlorite;
• iron hydroxide - leads to the formation of suspended particles in the water, which settle to the bottom and are then removed by mechanical filtration.

All chemical methods of odor removal are difficult to use in everyday life. The difficulty lies in the selection of the correct dosages of reagents for a given volume of liquid.

Sorption-catalytic method

Sorption filter for water purification

Good catalysts for getting rid of stench are black activated or granular charcoal. Water is driven through them, which leads to the oxidation of sulfur compounds. The efficiency of the method is high. But the main disadvantage of such cleaning is the long duration of the process. This is not very convenient for large volumes of water used for domestic purposes.

Special filters with coal loadings help to get rid of the smell of water from the well. They eliminate rotten amber quickly.

Complex cleaning methods

Integrated water treatment system

Even if the fluid from the well is visually clean, but it is clearly noticeable that it stinks, a qualitative analysis should first be carried out. Then pick up a complex installation for cleaning. Even in a transparent medium, bacteria, impurities of hydrogen sulfide, iron, and nitrates can be present. Already according to the actual composition of the water, it is worth choosing and making a complex installation. As a rule, it consists of the following sections:

• ultraviolet emitter that kills all microorganisms, bacteria;
• reverse osmosis plant, with the help of which the liquid gets rid of suspensions, dissolved impurities;
• flask with coal backfill for high-quality post-treatment.

The successive passage of water through all sections ensures the complete removal of all visible and invisible impurities, gases, and microorganisms from it. The output is a liquid suitable for domestic use.

The main condition for the full-fledged operation of new complex plants is the regular replacement of membranes, carbon backfills, and cartridges.

If there are difficulties with the choice of a complex filtering installation even after a water analysis, it is better to trust the specialists. Masters working with treatment plants will select the complex in accordance with the laboratory parameters of the liquid. In addition, large filter installation companies provide a guarantee for all types of equipment and provide after-sales service for their equipment.

Tasks:

• Educational:
• to acquaint students with the distribution of water in nature, to clarify and expand knowledge of the importance of water for living beings.
• organize a study by children of the basic properties of water.
• to form the concept of colorlessness, transparency, tastelessness.
• acquaint with filtration as one of the methods of purification of polluted water.
• Educational:
• develop coherent speech, introduce terms and concepts into the active dictionary: properties, filtration, filter, colorlessness, tastelessness, transparency, fluidity, solvent.
• develop visual perception, voluntary and involuntary, visual and auditory memory, voluntary attention; the ability to compare, observe, analyze and draw conclusions on the example of the topic material.
• educational e:
• to raise interest in the lessons of the world around, to form elements of a scientific worldview, a careful and active attitude of children to wildlife.

Equipment: A. Pleshakov's textbook "The World Around Us" Grade 3; cards with conventional weather signs, a chalk diagram on a blackboard for checking homework, a record of the topic and objectives of the lesson, a rebus, an audio recording with the sound of rain, a stream, an ocean, a diagram of the story “Water in Nature”, a globe, instructions for experiments, water, glasses, funnels, balls, napkin filters, sand, sugar, a table in children's notebooks and teachers on the blackboard for experiments, key words for experiments, individual cards.

DURING THE CLASSES

1. Class organization(1 minute.)

- The one who correctly names the symbol will land: clear, overcast, partly cloudy, rain, snow, light, strong, moderate wind, ice, cumulus, cirrus, stratus clouds.

2. Natural history minute(2 minutes.)

- Let's listen to our duty officers, who will tell about changes in nature in a week.

3. Checking homework. Introduction to the topic(5 minutes.)

– In the last lesson we studied the topic: Bodies, substances, particles. Let's see if you understand it.

1. Make a diagram at the blackboard and tell:

An example of filling out the diagram by a student:

2. Individual cards:

1. What is a body?

The body is only in humans and animals
The body is any object in the surrounding world

2. In which row are bodies of only inanimate nature listed, and in which - only animate?

Icicle, snowflake, water drop, air bubble _______________
Plants, animals, mushrooms ______________

1. What is the difference between natural bodies and products?

Bodies of nature only in nature, and products - in houses
Products are created by man, but man did not create the bodies of nature
Products are made of clay, and the bodies of nature are made of wood.

2. What is a substance?

These are different things in the house

1. Match the words in the first column with the words in the second column.

Glass Bodies of inanimate nature
Bed
Hare
Snowflake Wildlife Bodies
Chamomile
Notebook
Icicle Products
Butterfly
Stone

2. What is a substance?

These are different things in the house
This is what bodies are made of
This is leaf fall, snowfall, ice

1. What is the common word for the bodies of living nature? Underline the correct one.

Substances, animals, organisms.

2. The listed substances are divided into 3 groups. Match the words in the first column with the words in the second column.

Water Liquid
Salt
Natural gas Solid
Air
Milk Gaseous
Sugar

3. Give a short answer:

– What is a body? What groups are the bodies in? Examples.
- What is a substance? What groups do substances belong to? Examples.
- Why is it necessary to study the properties of different substances?

4. Checking task number 1

5. Frontally: Fill in the table according to the model (orally):

4. Message topic, lesson objectives(1 minute.)

So we come to the topic of our lesson. Guess the rebus and determine what we will learn in the lesson.

• Water properties
• Where is water found in nature?

5. Explanation of new material(5 minutes.)

a) Listening to the poem (2 min.)

Two students speak.

- Listen to the poem and say, in what natural phenomena and bodies is water present?

Asked the other day baby neighbor
At a trickle pouring from a faucet:
- Where are you from?
Water in response:
- From far away, from the ocean.
Then the kid walked in the forest,
The whole glade sparkled with dew.
- Where are you from? Rosu asked.
- Believe me, I'm from the ocean!
A gray mist fell on the field.
The kid asked the fog:
- Where are you from? Who are you?
- And I'm a friend, from the ocean!
- You, soda, what are you hissing?
And from a seething glass
There was a whisper:
- Know, baby, and I came from the ocean.
Amazing, isn't it?
In soup, in tea, in every drop,
In the sound of ice
And in the snowflake
And in the rain
And in the dew
We will always respond
Ocean water.

Where else can we find water?
“Why does the poem talk about ocean water, we don’t drink salt water, do we?”
All the water on our planet is here. World ocean water: salty and fresh.

b) Student's message (2 min.)

The plan of the story in the form of drawings on the tablet.
- Let's listen to Lena's message, and then you will answer the question: in what states does water occur in nature and why is it needed?

WATER IN NATURE

- Guys, what is it? (show globe)
What color is more on the globe?
- The seas, oceans, rivers, lakes of our planet are depicted in blue. They take up space 2 times more than land.
A thick layer of air envelops our Earth. There is a lot of water in the form of clouds, steam in the air.
Water is both underground and in the soil.
At the North and South Poles, water is in the form of ice.
Water is also found in animals and plants. And some, such as fish, cannot live without water at all.
Our body is more than half water. It carries nutrients throughout the body and removes harmful substances from it.
A person can live 30-40 days without food, and 4-5 days without water. A person needs 2 - 2.5 liters of water per day (he drinks part, and part is contained in food).
Where is water found in nature and in what states? (in the soil, underground, in the seas, oceans, in the air, in ice, in man, in plants; solid, liquid, in the form of vapor).
- What interesting things do you remember?

6. Physical Minute(1.5 min.)

- Let's get some rest.

Children imitate movements to the sound of water.

The ship pushed off from the green pier.
One, two!
Took a step back first.
One, two!
And then stepped forward
And swam, swam down the river
Gaining full speed.
The fish swim in the water
Everyone had fun in the stream,
They will shrink, they will unclench,
They will bury themselves in the sand.

7. Practical work(11-12 min.)

a) Studying the properties of water (10 min.)

We know a lot about water, but we will try to learn even more. Let's get acquainted with the properties of water through experiments. Take an instruction sheet for work (see A. Pleshakov's textbook "The World Around Us", grade 3)

PROPERTIES OF WATER

You already know that water is a liquid. Let's get acquainted with its properties.

PRACTICAL WORK

Experience 1. Put a ball or other object in one glass, and pour water into another glass. Has the shape of the ball changed? What about water? What property of water is this talking about?
Experience 2. Determine if clean water has an odor.
Experience 3. Try the water. Does she have a taste. Compare with the taste of milk, sugar, salt. What conclusion can we draw?
Experience 4. Drop a spoon into a glass of water. Is she visible? What property of water is this talking about?
Experience 5. Compare the color of the water with the color of the stripes shown on the sheet. Does water have color?
Experience 6. Pour some water on the ruler. What did you notice? Tilt the line. What happened to the water?
Experience 7. Pour a little salt or sugar into one glass of water, and the same amount of sand into another. Stir the water. What did you notice? What does this experience say?
Experience 8. Turbid, polluted water can be purified. To do this, it must be passed through filter.
How many experiments should we do?
- We read the experience, perform it, draw conclusions, and put the result in a table. You are in your notebook, and I am on the blackboard.

Experiments are conducted with the help of a teacher. Along the way, the teacher asks questions:

– What do you see?
– What do you feel?
- What conclusion can we draw?

b) Generalization (1 min.)

At the blackboard, 1 student answers, talking about his observations based on the table.

8. Fixing(10 min.)

a) problem situation

- One of the Russian riddles says that water cannot be rolled up a mountain, not carried away in a sieve, not held in one's hands. Why? What properties of water do you remember?
- We learned that water can be purified at home with a filter, but how does water get purified in nature?
– Read about it on page 65 in the textbook (with the help of sand).

b) Card work

Strong students:

1. By some of his activities, a person pollutes the water. Select it from the list.

Wash cars on the banks of reservoirs; drink water; discharge waste water from plants and factories into reservoirs; throw garbage into water bodies; watching TV .
Add if you know other sources of water pollution.

1. How does knowledge of the properties of water help protect health?

If the water is opaque or has a taste, it must not be drunk; if the water has a taste, it must be drunk; water is fluid, which means it washes dirt off the body well; if the water has an odor, it must not be drunk or smelled; hot water can cause body burns, while cold water can cause colds.

2. According to the description, determine what property of water is in question. Write down the name of this property. If the description refers to a property that water does not have, write the word "no".

Water spilled from the cup onto the table. Water spilled over the table. Water...
A cup of water was placed upside down. The cup was removed. There was a cup of water left. Water…
Put sugar into a glass of water. The sugar soon dissolved. Water...
The house was painted yellow with water. Water...
A spoon was dropped into a glass of water. The spoon is clearly visible. Water...

For average students:

1. What is water like in nature? Continue with examples from your observations.

Liquid water: dew, ________________________________________________.
Solid water: ice, ____________________________________.
Gaseous water: _______________________________________________.

2. What is the name of this method of water purification?

In experience

In nature Weak students: Match the words with the pictures with arrows. 1. Fluid 2. Transparent 3. No taste 4. Odorless c) Checking work on cards Children change cards and check each other's answers on cards with the correct answers given by the teacher. 9. Summary of the lesson What properties of water did you learn? What is the name of the water treatment method? Where is water found in nature? What is the importance of water for living organisms? Why do you need to know the properties of water? Evaluation of the work of students by the teacher, mark for the lesson. ten . Homework(2 minutes.)

Drinking water in our daily life often has a strong odor, which indicates certain problems in the water supply system. But we are not always talking about the appearance in huge concentrations of a harmful and rare pollutant that is dangerous to human health.

Usually the main cause of the smell is poor-quality water, i.e. a slight contamination of the liquid, which requires additional study of the chemical composition. After the results of the laboratory analysis, it is possible to restore the water to a state suitable for drinking. In general, contaminants can get into the liquid at absolutely every stage of the path from the water intake point to the home faucet. Often low-quality water has a chlorine smell or smells like sewage, and there is an unpleasant metallic taste.

This material presents an analysis of popular complaints about the smell of water and methods for self-diagnosis of the causes of this smell. Some people naively believe that the composition of drinking water is the same in every source. However, it is highly likely that the environment always influences the chemical composition and general characteristics of the water. At the same time, there are no serious transformations in the structure of the liquid, but an unpleasant odor appears for a long time and turns away from water, preventing it from being used for domestic purposes. Features unusual for clean and high-quality drinking water, including odors and noticeable impurities, can appear in various cases.

About regulations

The smell and taste of water are normative indicators of quality, which are determined by the rules World Health Organization and individual regional standards. The smell of water, as well as taste, transparency and color are related to the physical or organoleptic characteristics of the quality. Typically, the smell of water is determined at a temperature of +20 degrees and heated to +60 degrees, setting specific points for the nature of taste and odor intensity. It is believed that drinking water should not score more than three points, when the smell is easily noticed by the consumer and causes disapproval of the liquid.

Poor quality water: the main reasons

The disgusting smell of water flowing from the tap is often the result of the presence of metal pipes in the plumbing system. Bad breath is also the result of bacterial activity.. In addition, chemical substances with which disinfection occurs can endow water with strange qualities. Finally, water pollution from the environment also leads to odor. The most important thing in the situation of obtaining clean and safe water for the world is the diagnosis of a specific problem, the identification of its source.

First you need to remember that it is common for water to react with chemical elements, algae and microorganisms found in its composition. The interaction stimulates the formation of new substances that are already able to change the smell of water. These components are called odorants. They appear when ammonia, iron or hydrogen sulfide dissolves in a liquid, as well as during the activity of the excretory processes of the bacterial flora.

The smell of water is of two types. natural fragrance- earthy, fishy, ​​swampy, putrid, woody, fishy, ​​moldy, hydrogen sulfide odors. In addition, it happens artificial smell, which includes phenolic, gasoline, chlorine, medicinal and other harsh aromas.

Where does the sulfur smell come from?

The strong smell of hydrogen sulfide, which often reminds us of rotten eggs, is the result of water pollution by sulfur bacteria. They do not affect human health, that is, they are completely safe, but in general they indicate a poor state of the environment.

The reproduction of sulfur bacteria occurs in a situation of lack of oxygen: in a closed sewer system or deep wells. Microorganisms live in groundwater, and their vital processes are supported by decomposing organic substances, which are the main source of food for sulfur bacteria. At such a moment of nutrition, hydrogen sulfide is released in a gaseous state. Water sources do not allow the substance to evaporate, hence the sharp, persistent smell.

What to do in such a situation? First, determine the location. Then provide the hydrogen sulfide gas with access to fresh air, i.e. organize ventilation. In groundwater, by the way, sulfur bacteria are considered the norm in low concentrations of up to 0.5 ppm. But with all the safety for water and people, they immediately smell of sulfur. If the level of microorganisms in the water rises 3-4 times, the liquid acquires an unbearable smell of rotten eggs.

A sulfuric odor can be the result of a chemical reaction that has developed in a water heater. In such a situation, hot water will already smell unpleasant. Eliminating odor in this case involves determining the place with bacteria, so you need to open the water tap and turn on the maximum pressure. If the odor subsides or disappears completely, sulfur bacteria will develop in the water distribution system itself. If the smell remains or intensifies over time, the root of the problem lies in the well itself. In general, sulfur in the water supply system is not a very good sign, because over time this component corrodes the metal parts of the pipes. Therefore, it does not hurt to contact the laboratory and ask specialists to examine water samples.

Eliminating sewage odor and its causes

The unpleasant odor of sewage is also a common problem with drinking water. It is the result of sewer bacteria. Microorganisms are very harmful, but, fortunately, they do not get into the water supply system. However, they release a special gas that rises up and exits through the sink, accumulating near the drain hole. From here there is a feeling of the presence of a smell in the water itself. In general, such a situation clearly indicates problems in the sewer system, namely, violations in its device. To get rid of the smell, it is necessary to correctly mount the sewer hood.

If an unpleasant plume reaches only for hot water, we are talking about problems with the heating tank. Bacteria multiply in it due to the constant use of equipment in low temperature mode or due to frequent shutdown of equipment for a long period. The main preventive measure here is boiling the liquid in the heating tank once or twice a month.

By regularly heating the water only up to +40 degrees, you stimulate the appearance of unpleasant odors. When you have an old heater, it makes sense to also drain the water and organize a massive tank cleaning.

A temporary neutralizer of unpleasant odors in the boiler is an installed special filter. But still it does not solve the problem, so use a whole range of effective measures:

• Completely drain the water from the boiler and distribution system.
• Fill the system with clean water and turn on the equipment at maximum power.
• When the boiler has worked in intensive mode for 10-12 hours, drain the water from the entire system.
• Repeat the second step. This completes the preparation of the heater for normal operation.

With such measures, you can clean the system of bacteria very quickly and return hot water to normal. But always with the appearance of a smell, do not forget to find out if the pipes or the liquid itself smell. It is enough to pour water into a cup, move away from the sink and smell the contents of the container. Perform this procedure with both cold and hot water to pinpoint the source of the odor. If the liquid in the glass does not give anything away, the reason lies in the drain system or pipes.

The unpleasant smell of water from the well: where does it come from

First of all, the pronounced smell of water indicates the accumulation of hydrogen sulfide in the well. Its appearance there is due to the fact that underground water sources contain many chemical components, such as sulfur, iron, manganese and ammonia.

• If the water smells of rust, then it has iron salts that have reacted with oxygen.
• Chlorination of well water to remove bacterial flora stimulates the development of a chlorine odor.
• And if the liquid gives off ammonia, there are ammonia compounds in the composition.
• If there are organic components in the water, it will eventually begin to rot, become musty and give off a swamp or earth.
• The presence of manganese particles also affects the composition and smell of water. At high concentrations, these mineral compounds provide the liquid with a salty taste.
• The smell of iodine is considered the most dangerous, because it indicates the appearance of industrial waste in the groundwater layer. In such a situation, it is necessary to stop drinking liquids, because phenol - a product of iodine excretion - is extremely dangerous for the human body, that is, it depresses the nervous system. The smell of phenol is often similar to that of gouache paints.
• The smell of fish and mustiness is formed as a result of the ingress of nitrogen-containing substances into the liquid, for example, the remains of some algae or plants.

Please note that poor water quality is not only a smell, but also a changed color. For example, calcium salts form a dense white suspension, and calcium in combination with magnesium cause scale formation on dishes. Hydrogen sulfide gives itself out as dark spots on silverware and a yellow coating on the sink. The yellow color of the water is associated with humic acid, and the multi-colored stains are associated with oil products.

Naturally, in such a situation with odors, the suitability of water for drinking is in question. The problem is especially relevant for owners of private cottages and plots. Elimination of smell in this case is necessary as soon as possible.

Water purification and removal of unwanted odors

If you want to change the chemical composition of water for the better and bring the quality of the liquid up to the requirements of SanPiN, pay attention to the measures of complex purification by filtration.

Precleaning

This method is suitable for treating water from a shallow well. The liquid to be purified is settled and even exposed to the influence of reagents. The specific filter is determined by the chemical characteristics of the water, so a laboratory analysis of the liquid is needed.

Removal of hydrogen sulfide compounds

There are three main ways to destroy hydrogen sulfide according to its chemical properties.

• physical method- bubbling water - implies saturation of the liquid with oxygen and accelerated weathering of hydrogen sulfide due to the operation of the compressor.
• chemical method involves the dosed addition of oxidizing agents to water, that is, salts of various chemicals, for example, sulfur.
• Sorption method It is based on the fact that hydrogen sulfide acquires an insoluble form in water and settles, so it is easy to filter it.

Destruction of the iron smell

If there are iron salts in the well, then the water, being at first transparent and clean, in a short time turns into a cloudy and yellow liquid. The brightness of the color in this case directly depends on the concentration of iron, since it reacts with oxygen from the air.

After a couple of days, the water will become clear again. But at the bottom you will see a thick layer of brownish sediment. The high iron content gives the water not just a rusty smell, but an identical unpleasant taste. The situation can only be resolved by aeration - saturation of water with oxygen or oxidation with reagents. But in private ownership, it is quite difficult and expensive to turn such a procedure for personal purposes.

Therefore, the owners of individual sources of water supply, as practice shows, often resort to pumping water through a purification system. The water filter has several replaceable cartridges of different types, which are not limited to mechanical water treatment. The components in the filter cassette interact with the liquid and remove chemical contaminants by almost 100%.

How to remove swamp smell?

The main mistake most water users make is that they equate visual purity with ideal composition. In fact, if the liquid comes from the well without any impurities and with a normal, unclouded color, this does not mean that there are no compounds and suspensions of various types in it. The actual composition of the water can only be determined after contacting the laboratory, where appropriate analyzes of the liquid are carried out.

In the presence of various bacteria, algae and organic compounds, the water can acquire a marsh smell. It is not only unpleasant, but also difficult to remove. Here, users will need a comprehensive cleaning of the liquid, which involves the stage of adsorption with activated carbon. The correct approach and the gradual solution of the problem completely destroys the marsh and putrefactive odors near the water. Coal copes with its tasks very quickly, and the filtration system additionally removes the pollutants that caused the smell. Thus, a high-quality integrated water purification system includes:

• that destroys microorganisms;
• reverse osmosis system that removes iron and mechanical impurities;
• , which does not pass suspensions that penetrated through the membrane at the previous stage.

If you install the entire filtration complex in series, the water will be cleaned quickly and very efficiently.. In this situation, the most important issue is the choice of a specific water treatment system. If you understand little about this, entrust the process to professionals in this field.

Today, the Ukrainian market offers consumers enough manufacturers of water treatment systems that produce high-quality equipment of various configurations. Choosing the right type of filter for your water can be difficult on your own, so consulting a specialist will never be superfluous.

And of course, you should not install a water treatment system with your own hands, even if after reading the materials on the Internet it seems that you understand everything. It is much easier and more convenient to apply directly to a company that installs filters and at the same time will provide you with additional services: advice on choosing equipment, analysis of the composition of water in a well or well, delivery of the system and its connection. Remember that the company must provide you with certain guarantees and provide in case of various breakdowns.

Where does our morning start? Most often with a cup of strong coffee, aromatic tea or a glass of clean water. We are so arranged that every day we must drink water or drinks made on the basis of water. Water is one of the main needs of our body. But here you need to make a clarification - the water must be clean. And immediately questions arise: “What is clean water like? What color, taste and smell does it have?

water color

Physicists say that pure water in small volumes is transparent. In laboratories, a simple interesting experiment is carried out to assess the transparency of water. A special glass cylinder with a flat bottom is placed above the text at a height of 4 cm, and then water is gradually poured into the cylinder and the text is read. If the water is clear, then the text can be easily read through a thirty-centimeter layer of water.

The color of water depends on whether it contains impurities. Good clear water is colorless. Impurities can also give the water some shade. So, iron colors water brownish, and hydrogen sulfide - greenish.

It happens that clean table water suddenly starts to turn green. Usually this phenomenon can be observed in open bottles a few months after the purchase of water. This is due to the fact that a large number of microorganisms are constantly present in the air. Once in the water, they begin to develop there - this becomes the reason for the greening of the water.

When purchasing water, you need to remember that it has its own expiration date, as well as its own storage conditions. It is equally important to keep the cooler and pump clean and clean them about once every three months. Then the water will remain clear and colorless for a long time - the way it should be.

The smell of water

The quality of water can be determined by smell. To do this, it is enough to smell it. Doesn't smell like anything? Excellent! So the water is good. But if there is a foreign smell, then this is not a very good sign.

Specialists in laboratories distinguish different types of odors of poor-quality water - hydrogen sulfide, chloride, tar, swamp, mold, putrid, etc. Each of these smells indicates the presence of certain substances in the water.

In the laboratory, before assessing the smell of water, it is heated to 60 ° C, since heated water smells stronger. The smell of hydrogen sulfide may appear due to the presence of microorganisms in the water. The smell of chlorine indicates that there is too much chlorine in the water, which is used to disinfect the water. And the smell of resin occurs when effluents from industrial enterprises enter the water. So the best smell for table drinking water is its complete absence.

The taste of water

The taste of water is easy to determine - you just need to try it. In laboratories, there is a method for determining the taste of water. To do this, the water is heated to a temperature of 30 ° C, and then the taster takes a small sip and holds the water in his mouth for several seconds. It is believed that this time is enough to feel the taste and taste of water.

Water has bitter, salty, sweet and sour tastes, as well as various flavors - swampy, oily, metallic. Each of these tastes and flavors indicates the presence of any foreign substances in the water. For example, magnesium gives water a bitter taste, sodium chloride is salty, and organic matter is sweet. Pure table water should not have any taste or taste.

This rule does not apply to mineral water, which, due to the presence of trace elements, may have a salty or sour taste, and sometimes it may also have a specific smell.

It turns out that pure table water should be transparent, colorless, odorless and tasteless. This is from a chemical point of view. But some believe that clean water smells like wind and tastes like rain. And in a way they are right.

Sommelier for water

Interestingly, in some countries, prestigious restaurants have water cards, following the example of wine cards, and sommeliers. Sommeliers offer visitors water in elegant glass bottles. These bottles are designed by fashion designers and the water comes from different origins. It can be spring water, water from deep underground lakes, or glacial water. For meat dishes, one type of water is offered, and for fruits and desserts - a completely different one.