Do-it-yourself septic tank without pumping and odor: simple solutions for your dacha

Approximate prices for the services of a vacuum cleaner

When ordering the pumping of a septic tank or a cesspool, you need to provide the contractor with data on its volume and location. This will allow you to select a tank truck of the optimal volume (from 4 to 15 m3) and supply it with a hose of sufficient length (up to 50 meters).

The estimated cost of pumping out 1 m3 of a septic tank for 2016 is 850 rubles. Some firms use a "flexible" price tag for the removal of sewage.In this case, the minimum price of 850 rubles per cubic meter is set for pumping at least 13 m3. With a smaller volume, the tariff increases to 1300 rubles/m3.

The factor of remoteness of the customer's object from the contractor's production base affects the price formation. The average rise in price is 50 rubles. for every kilometer outside the city limits. The amount received is added to the total cost of pumped "cubes".

Some companies, in order to attract customers, set a low tariff for the removal of 1 m3 of sewage (500-600 rubles). At the same time, in their price tags there is a “minimum order” item. It is equal to the full capacity of the called tank truck.

The length of the hose is another possible cost factor for the service. As standard, the machine is equipped with a 6-meter sleeve. If it does not reach the septic tank or cesspool (according to your calculations), then for every additional 6 meters of hose you will have to pay at least 500 rubles.

Installation and installation of a septic tank

1. First, a pit is dug. A septic tank and an infiltrator will be installed in it. At the same time, trenches are being prepared in which sewer pipes will be laid. It should be borne in mind that there may be several reservoirs. Their number depends on several factors: family composition; the number of possible visitors; how they will live in the house, in the country: permanently or temporarily.
2. After the pit is prepared, the bottom is leveled, that is, covered with sand. The layer thickness should be no more than 30 cm. If the groundwater is high in the area where the septic tank is installed, then the bottom of the pit is strengthened. For this, a concrete screed is made.
3. Before installing the infiltrator, gravel is poured to the bottom and rammed. The thickness of the gravel layer should be within 40 cm.
4. The bottom of the trenches is also covered with sand.The thickness of the layer should be from 20 to 30 cm.
5. After preparing the bottom of the pit and trenches, you can install both the tank and the infiltrator. Then sewer pipes are connected to them and filled with water. Water in the tank will be needed in order to properly fill the pit with earth, this will make the structure stronger and more stable when backfilling the pit.
6. The final part of the installation is the backfilling of the tank and the infiltrator on the sides. They are covered with sand or a mixture, which includes sand and cement in a ratio of 5 to 1. The trenches are covered with sand mixed with earth.

The principle of operation of a septic tank without pumping

A septic tank is a structure of two or more tanks located in the ground and communicating with each other using a sewer pipe. Processing of sewage occurs in the following sequence:

1. Wastewater enters the first tank and begins to decompose under the influence of anaerobic (not requiring oxygen to maintain life) bacteria. Heavy solid fractions settle to the bottom and are periodically pumped out. You can pump out the septic tank using a drainage pump.
2. As a result, organic waste in the process of fermentation is converted into simple elements (alcohols, various types of acids, and others) and gases are released. The bacterial population recovers on its own, and in case of death of the colony, biologically active preparations are added.
3. The second chamber is designed for deep processing of liquid freed from fatty film and light impurities. During processing, stable sludge is formed and carbon dioxide, methane and other gaseous substances are released.
4. The clarified liquid enters the drainage well or filtration field, where the effluent is oxidized with the participation of aerobic bacteria and absorbed into the soil.

Advantageous features of use in country houses

It is almost impossible to do without a cleaning system in country houses and summer cottages. If it is a biological design without pumping, then it has a number of positive aspects, the main ones being:

1. Wastewater treatment, according to SNiP, is 98%. At the same time, no negative impact on the environment and human life is observed.
2. Working on the principle of activity of biological cleaning components, there is no need to regularly involve special equipment for pumping. Therefore, cost savings will be provided.
3. Organic sludge that remains as a result of filtration does not require frequent cleaning (every 4-5 years). This is an excellent means of organic fertilizer garden plots.
4. A well-made septic tank practically eliminates the occurrence of an unpleasant odor from drains in the area of ​​\u200b\u200bits location.

During the cleaning of the bioseptic chambers from silt, it is necessary to leave 1/6 of the accumulated sediment. This is necessary for the further work of anaerobic bacteria.

Septic tank from monolithic concrete

When constructing septic tanks for a reinforced concrete house, there is no need to involve special equipment - all work can be done manually. Such containers can have a different volume - you no longer have to focus on the size of concrete rings.

Two-chamber concrete septic tank

However, the construction of such a septic tank will be more laborious:

1A rectangular pit is being prepared for the arrangement of a 2-3 chamber septic tank.Since it will be a form for future construction, it is better to dig it out by hand so that the walls are as even as possible. The excavated earth can be removed or scattered in an even layer over the site.

2 On both sides of the pit, trenches are being prepared with a depth below the soil freezing level for laying pipes. The first trench is laid towards the house, the second - towards the filtration well or drainage field.

3 To protect concrete from moisture, a sand and gravel cushion is poured into the bottom of the pit with a layer of 20-30 cm.

4 The bottom of the pit is poured first. For this, a standard cement mortar made of high-quality cement M300-400 is used. When using cement M400, the proportions by weight in kg (cement, sand, crushed stone) will be 1.0: 1.2: 2.7. The amount of water depends on the moisture content of the materials used.

5 In order to prevent moisture from the solution from leaving the ground, before pouring, a waterproofing layer of a sufficiently thick polyethylene film is laid on the bottom. It is placed overlapping.

6To reinforce the bottom and walls of the container, a metal mesh or rods are used. To protect against rust and ensure structural strength, the mesh must be placed in the center of the formwork at a distance of 7 cm from the edges. It is necessary to maintain the same distance from the bottom of the pit.

7 After the formwork has been arranged, pipe overflows are installed in the upper part of the tank. Otherwise, already hardened concrete will have to be hammered.

8 To protect the solution from leakage, a plastic film is placed in the formwork.

9 To reduce the risk of voids, pouring is done in stages with a height of each layer of 0.5 m with a break of 2-3 days. The solution must be compacted with a bayonet shovel or vibrator.

10 The process of hardening of concrete in the summer is 3-4 weeks. In cold weather, this time may be longer.

11After the concrete has dried, a ceiling with a hole for the hatch is installed. Moreover, such hatches are required to be equipped for each tank. To do this, metal corners are laid on top of the structure, then boards and a layer of waterproofing. Next, the reinforcement is laid, and the ceiling is poured with concrete.

12 Do not forget to provide ventilation pipes in the ceiling for the removal of explosive methane. They should rise above the ground by 30-50 cm.

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Types of autonomous sewage

In order to consciously and correctly choose the type of sewage for a summer residence, one must at least in general terms imagine the advantages and disadvantages of each of the possible options. There are not so many of them:

• Cesspool pit. The most primitive and far from the best way to dispose of wastewater. To begin with, it is very difficult to ensure complete tightness. Even with high-quality processing, some part of the effluent enters the ground. If the source of water is a well or a well, then sooner or later bacteria that live in sewage pits will be found in them. Another drawback is the corresponding smell, which is problematic to deal with due to leaks, and the need for regular pumping. Therefore, such sewerage in the country is being built less and less.
• storage capacity. The essence of this type of sewerage is the same: drains are collected in containers, periodically pumped out. Only these containers are completely sealed, as they are usually made of plastic.The disadvantage is the relatively high price.

• Septic tanks. A system of several interconnected containers (two - three, rarely more). Wastewater enters the first place, where it settles and is processed by bacteria. Insoluble residues settle to the bottom, the water rises to the top. With the next flow of effluents, the level rises, the settled water is poured into the next container. Other bacteria “live” here, which complete the cleaning (up to 98%). From the second compartment of the septic tank, the liquid can be removed for further filtration into the ground. She's almost clean. The design is simple, there is nothing to break. The disadvantage is that the device itself is voluminous, plus a filtration field is needed (where water will be discharged), once a year or two cleaning the septic tank from insoluble sediment.
• VOC or AU - local treatment plants or automatic installations. The principle of operation of a septic tank, but in a more compact size, with electronic filling for control. This type of sewer works only when electricity is available. The maximum battery life is up to 4 hours. The small size of VOCs impose restrictions on a one-time discharge of effluents: if you flush a bath, you should not flush in the toilet. And the biggest downside is the price.

With a more active use of the summer cottage, the sewerage system for the summer cottage needs a more serious one. A smart choice is to install a septic tank, make filtration fields according to the instructions, or install an absorbing well. It is better to take a septic tank from the factory, if possible - fiberglass. Of course, it costs a lot of money, but home-made septic tanks, although they are cheaper during construction, require constant repairs during operation, and besides everything, most of them suffer from leaks.After all, we are talking about a dacha, and everything that gets into the ground ends up on your table as a result - in the form of water, if the water supply is from a well or well, and then in the form of a crop that you water with this water.

If you definitely decide to make a septic tank with your own hands, there are several options:

• Monolithic concrete. It is possible to achieve a high level of sealing, but the amount of work is large and requires a lot of time.
• Brick. Not the best option, as it can be destroyed on heaving soils. It can be used provided that the walls are plastered. Tightness can be achieved with the help of modern waterproofing coating materials.
• Concrete septic tank. With proper execution, it works well, but it is operated without problems on soils that are not prone to heaving. On clays and loams, the rings often move from their place, the tightness is broken. Repair is a complex and unpleasant undertaking.
• From metal. The tightness is at a high level, but until the metal corrodes, and this will happen pretty soon.

The easiest way is to make a septic tank in the country from concrete rings. Its volume should be large enough - it is believed that in such a device there should be a place for the accumulation of a three-day supply of wastewater. Consumption per day is taken at 200-250 liters per person, the total consumption is calculated according to the number of people in the country at a time with some margin in case guests arrive. For a family of 3-4 people, the usual volume of a septic tank is 2.5-3 cubic meters.

Installation work

Plastic septic tank

To make a sewage treatment plant with your own hands from plastic eurocubes, you must first dig a pit. Its dimensions should exceed the parameters of the cubes by 30 cm on each side.Subsequently, such a gap will be filled with clay or a mixture of cement and sand.

The bottom of the pit is compacted and a layer of sand is poured into it, the thickness of which should be 20-30 cm. The sand is well rammed.
A concrete slab is laid on a sand cushion and plastic cubes are attached to it with the help of anchors and strong chains. Chains play the role of clamps.
The chambers of a plastic septic tank are interconnected by overflow pipes, observing the tightness of the joints. The bottom of the third chamber is cut off and a pillow is made from a layer of sand 20 cm thick and a layer of crushed stone 30 cm thick. For better drainage, perforation can be made along the lower edge of the eurocube walls.
Now you need to provide additional immobility of the tanks. From the outside, the space between the tanks and the walls of the pit is covered with a mixture of sand and cement in a ratio of 3: 1

It is important to backfill in stages, first filling the containers with water by 20 cm and then pouring the sprinkle to the same height. The last one is well rammed

Thus, they move to the very top of the septic tank chambers.
Lastly, a concrete slab is laid over the chambers, leaving space for the ventilation pipe for the first and second chambers and inspection hatches.

We launch bacteria into the septic tank without pumping out, and we begin to operate it.

Brick septic tank

In this case, do-it-yourself work is carried out in this order:

• Digging of the pit and reliable sealing of the bottom.
• Bricklaying for a cleaning system without pumping. In this case, the cross section of the treatment system can be either round, or square or rectangular.
• Overflow pipes are immediately mounted between the chambers at the laying stage.
• The walls of the septic tank, after the solution has solidified, are treated with bituminous mastic from the outside and from the inside. The third chamber of the septic tank can not be coated.
• Now the bottom of the two compartments of the treatment plant is covered with a layer of sand 20 cm thick and rammed well.
• A reinforcing mesh is laid at the bottom and a concrete solution 20 cm thick is poured.
• The bottom of the third chamber of the septic tank without pumping is made drainage. Here sand is alternately poured, and then crushed stone.

Septic tank made of concrete rings

Such a construction, erected by one's own hands, is quite reliable and monolithic. Work is performed in the following order:

• They are digging a pit to install rings for three chambers.
• With the help of a special crown on the perforator, holes are formed for the installation of a sewer pipe and overflow hoses.
• The rings are installed one on one until the desired volume of the septic tank is reached.
• The joints and walls of the first two chambers are treated with bituminous mastic in order to achieve maximum tightness of the device.
• The bottom of the first two chambers is concreted, having first arranged a sand cushion and laid a reinforcing mesh on it.
• The bottom of the third chamber for a treatment system without pumping out is made of sand and gravel drainage.
• The entire structure is covered with a concrete slab with holes for the ventilation pipe and inspection hatches.

Car tire septic tank

Such a wastewater treatment system without pumping out can be built by hand if the volume of wastewater is small. The work is carried out by analogy with the construction of a septic tank from concrete rings. The only difference is a more reliable sealing of all joints of the chambers and a better bottom device. Here, concrete can be poured in such a way that part of the lowest chamber is covered with a cement mixture and subsequently concreted.

The bottom of the third chamber for a septic tank without pumping is made draining.And for better drainage, you can slightly perforate the bottom cover of the third chamber.

Outside, a cleaning well made of automobile tires is sprinkled with clay or a mixture of sand and cement, reliably compacting them.

The top of such a septic tank can be covered with hatches selected according to the diameter of the tires. This will prevent the appearance of an unpleasant odor in the area.

Remember, a competent approach, a little ingenuity and improvised means allow you to make a reliable and efficient sewerage system without pumping your own hands in a summer cottage.

Do-it-yourself septic tank scheme from rings for a suburban area

Concrete rings are the most common material for building a septic tank.

Advantages of this method:

• high level of tightness;
• fast installation system;
• strength;
• durability.

The diameter of the rings is selected taking into account the required volume of the treatment plant. The maximum allowable number of rings for one chamber is 4.

Diagram of a septic tank made of concrete rings with your own hands

Disadvantages of the method:

• high construction costs;
• difficulties during installation (the issue of connecting the cameras to each other);
• volumes are strictly limited;
• the need for specialized equipment.

After the organization of pits. the bottom is being prepared for storage chambers. This area is being concreted. Other preparatory work is provided for the filter well. The specificity of this chamber requires the implementation of a crushed stone cushion at the bottom.

Installation of a three-chamber septic tank from reinforced concrete rings

Installation of concrete rings is carried out one on another. At this stage, it is necessary to take into account the supply of the pipe system to the wells

It is important to carefully calculate the diameter and angle of the slope.

The chambers are sealed from the inside and outside. To do this, it is recommended to use modern coating materials, cement mortar and waterproofing materials of the built-up type. After that, the pits fall asleep.

Dimensions of reinforced concrete rings for a septic tank

Device, advantages and disadvantages of cesspools

The cost of factory treatment facilities is still quite high. A good alternative to such structures are homemade septic tanks and cesspools.

A cesspool is the easiest way to equip a local sewage system, due to which this type of sewage storage is most common in suburban areas. Making a waste tank of this type is quite simple. To do this, at a depth below the freezing level of the soil, a tank is installed or built, to which a sewer line is run from all drain points located in the house. After filling the pit with sewage, they are pumped out and removed from the site using sewage trucks. For this, the design of the storage tank provides a hatch, which is also used to monitor the level of wastewater.

Depending on the design, all cesspools are divided into two types:

• storage facilities without a bottom;
• sealed waste containers.

The first is a filtration type design. Once in the cesspool, wastewater is absorbed into the soil and, with the help of microorganisms, is processed into water and the simplest organic compounds. The coarse fraction is deposited at the bottom of the reservoir, where it is also exposed to bacteria, turning into sludge and liquid.In order for the decomposition process to take place more actively, special agents with biologically active components are added to the drains. Due to the absorption capacity of the soil and the processing of sewage by bacteria, the volume of effluents in the reservoir decreases many times. The remaining sediments are rarely pumped out, so structures of this type are also called cesspools without pumping.

Construction of a cesspool without pumping

Sewer tanks of the second type are sealed systems, therefore, they require the regular use of the services of sewage trucks. Nevertheless, such cesspools are the safest in terms of environmental impact and in some cases represent the only possible option for arranging the sewerage of a country house or cottage.

When constructing a sealed cesspool, one must be prepared for the regular use of sewage trucks

Advantages of cesspools without pumping:

• a simple design allows you to build a storage tank with your own hands;
• the possibility of using various materials for construction;
• increased interval between pumping wastewater;
• low cost and low operating costs.

It would seem that the design of filtration cesspools should not have alternatives, right? In fact, this option has significant drawbacks, which can sometimes cancel all the advantages:

• high requirements for the choice of installation site;
• decrease in absorption capacity over time;
• the possibility of unpleasant odors in the area;
• environmental hazard;
• the use of special bacterial compositions makes it impossible to use chemical detergents.

Do-it-yourself septic tank without pumping out - detailed instructions + video

To forget for a long time about the need to remove wastewater from a cesspool or sewer well, you can make a septic tank without pumping it yourself. We will tell you how to make a design without involving specialists.

The design of the septic tank and the features of its work

In order to make septic tanks without pumping out with your own hands in your country house, you must first of all understand the principle of operation of such a structure. This is a structure that is placed in the ground. The structure consists of several tanks, which are connected by pipes, ventilation holes, sealed covers for each tank and a connecting pipe. Wastes enter the first bowl through sewer pipes, which settle over time, while the sediment sinks to the very bottom.

Do-it-yourself septic tank without pumping

Gradually, the sediments are processed, being under the influence of both anaerobic bacteria that are present in the septic tank, and artificially introduced through sewer pipes. After some time, the waste will begin to decompose, releasing gas that escapes through the vents. Thanks to this, toilet smell will never appear in your country house. After some time, when the first chamber is completely filled, the liquid will begin to flow into the next chamber, and so on. From the last chamber, the liquid enters the soil.

Due to the fact that anaerobic bacteria process a large amount of solid waste, and the liquid goes into the ground from the last chamber, such an autonomous sewer can last for about 20 years without cleaning. And in order for the design to work smoothly in your country house, solid inorganic waste should not be allowed to enter the containers.

How to choose a place for arranging a building?

Before proceeding with the manufacture of a septic tank, you need to choose a suitable place for its installation. The location of the structure affects the condition of the site. For example, placing a container near an aquifer or near a well can spoil the quality of the water. In addition, the septic tank also affects the condition of the soil, and if you make a structure near the house, this can cause erosion of the soil and deformation of the foundation of the house in the future.

Location for a septic tank

The structure should be mounted a meter from outbuildings and at least 5 meters from the house

There is one important note: when equipping the structure, divert all possible water away from the septic tank. Near the septic tank there should not be drains, a reservoir, or any plantings that require regular watering. Do not forget to determine the volume of the septic tank

There is nothing complicated here: just multiply the number of people living in the house by 150 - about so many liters of water is the average daily consumption rate. We multiply the final figure by three (volume reserves for three days) and add 20% to this. The desired value is the estimated capacity of the structure. In a two-chamber design, the dimensions of the first chamber should be equal to 75% of the total value, the volume of the second tank should be 25%. The three-chamber design has the following proportions: 50% of the volume for the first tank and 25% for the last two

Do not forget to determine the volume of the septic tank. There is nothing complicated here: just multiply the number of people living in the house by 150 - about so many liters of water is the average daily consumption rate.We multiply the final figure by three (volume reserves for three days) and add 20% to this. The desired value is the estimated capacity of the structure. In a two-chamber design, the dimensions of the first chamber should be equal to 75% of the total value, the volume of the second tank should be 25%. The three-chamber design has the following proportions: 50% of the volume for the first tank and 25% for the last two.

We build a septic tank without pumping out with our own hands - step by step instructions

You can build a country septic tank without pumping out using bricks, ready-made plastic bowls, prefabricated iron structures or walls made by pouring concrete into the formwork. It should be noted right away that ready-made plastic containers are quite expensive and poorly resist ground pressure, deforming over time. Brick is a good option, but not long-term - this material quickly collapses, reducing the life of the structure. A good option is a prefabricated reinforced concrete structure, but it is very expensive to equip such a structure for a summer residence. Therefore, the most optimal solution would be the arrangement of containers made of monolithic concrete.

We build a septic tank with our own hands without pumping

If we build a two-chamber septic tank, including an aeration block and a drainage well, then the total volume of the septic tank chambers is equal to the obtained value, and its distribution has the following values: for the sewage injection chamber ¾ of the total volume (i.e. 6 cubic meters) and for the drainage well chamber— the remaining 25% (i.e. 1.5 cubic meters). Now, by sorting through the options, it is necessary to determine the actual dimensions of the pit, taking into account the level of groundwater rise and the depth of the sewer route to the entrance to the septic tank. General thoughts on this:

• the reference point of the upper level of the septic tank is the height of the drain;
• the bottom of the septic tank cannot be below the groundwater level;
• the bottom of the drainage well should be as close as possible to the sandy or gravel soil layer - this is the key to a future without problems. Suppose that in our area the groundwater level is not higher than 2.5 m. Then we take the depth of the pit 2, add another 40 cm for the sand cushion and the concrete base of the pit equally. Since the depth of the sewer pipes will be at least 0.5 m (the depth of soil freezing), the height of the septic tank will be 1.5 m, and the area, for example, 2 × 2.5 m.

After all that has been done, an exciting moment comes - choosing the location of the septic tank on the site. It is imperative to avoid violating sanitary standards:

• distance from the house and waterways at least 10 m;
• the distance from wells and water intake points should not be less than 20 m, since water from the septic tank is discharged into the ground;
• It is not at all superfluous to provide for the possibility of vehicle access to the septic tank - and during construction it will be easier and the maintenance of the septic tank, no matter how rare it may be, is simplified.

Since we will build a septic tank with our own hands, and the goals and objectives are already clear and even the place has been chosen, then for ... a shovel, comrades (or gentlemen). The pit is dug, taking into account future filling and backfilling, 20 cm more for each size. Stages of upcoming work:

• dig a pit;
• make formwork;
• perform concrete work;
• cover the septic tank.

Digging a pit is a simple matter, but in the age of continuous mechanization of construction work it is not prestigious, so you can dig the main volume with an excavator, and then trim the vertical walls and adjust the size, as intended, manually.

Formwork can be made from any board in the form of shields, and then, after installation in the pit, tie them with a beam from the inside. Before pouring, a welded reinforcing mesh is installed, the best option, or tied with a knitting wire. The grid is fixed from movement during pouring by deepening the bottom into the ground by 5–10 cm and spacers. If the grid is concreted so that on each side the concrete layer is at least 5 cm, then this will protect it from corrosion.

In the installed formwork, holes are made for inlet pipes and overflow between the wells of the septic tank. The overflow pipe is installed below the drain pipe. All installed pipes extend from the wall or partition by 30 cm.

cement-sand-crushed stone formwork can be removed after 3 days

Removing the formwork opens the front of work on arranging the bottom of the first septic tank. To do this, a sand cushion of 20 cm is poured, and then a concrete pour is made of the same thickness. Of course, here they are also reinforced with a mesh. The bottom of the drainage well is filled with a filter mixture of expanded clay or crushed stone with sand 0.5 m thick.

The last stage of work on the construction of a septic tank without pumping out with your own hands is the construction of a ceiling. To do this, first, stiffeners from a corner or channel are installed along the perimeter of the walls and lintels. Then, a flooring of planks, or flat slate, or cement particle board, is laid on the shelves of the metal strapping. Then a mesh of reinforcement and formwork are installed on the sides. Hatches are located in the right places and secured from displacement.A plastic ventilation pipe is installed on the drainage well to remove biogas.

Varieties of external sewerage of a private house

A septic tank is a tank or several tanks connected to each other, designed to accumulate wastewater and remove pollution from them. According to the type of functioning and, accordingly, the device, all systems for the disposal of wastewater from a private house can be divided into 3 categories:

• drives;
• systems with anaerobic treatment;
• local aerobic stations providing maximum removal of contaminants.

The first option is the least convenient, as it requires the regular call of a sewage truck, which is most often not suitable for giving and requires significant financial costs for maintenance.

Septic tank

Let us consider in more detail the two remaining types of septic tanks that do not require the call of a sewer.

Aerobic waste disposal systems

Local biological treatment plants using an aeration (air supply) system are compact versions of citywide sewage treatment plants. Their work is divided into several stages.

1. The first stage takes place in the sump and consists of sedimentation. Large heavy pollution are at the bottom. Partially purified water through the overflow system enters the next stage.
2. The essence of local treatment facilities is manifested at the stage of biological treatment. In such systems, a natural process is used - the decomposition of waste by activated sludge microorganisms. Maximum purification is achieved by alternating anaerobic and aerobic phases. For the latter, air is supplied to the chamber by an aerator.
3. The final stage is the precipitation of activated sludge.

How a septic tank works

Also, often such systems are supplied with hair traps.

Septic tank "Topas S 12"

The output is water purified by about 95%. It can be poured onto the terrain or used for technical needs. It is the high degree of purification that is the main advantage of such a system.

UV disinfection of drain

Septic tank with anaerobic treatment

Effluent treatment devices without the use of aeration are structurally simple. They are one or two tanks connected by an overflow system and supplemented with a soil filtration stage. The principle of their action is also simple.

1. The first chamber serves as a sump. The process of oxygen-free decomposition of organic matter also takes place here. If there is a lot of sewage, then an additional tank is installed. It continues the process of sedimentation of lighter suspensions and anaerobic decomposition.
2. Since the degree of purification does not exceed 60% without oxygen, it is unacceptable to discharge wastewater onto the terrain. For further utilization, water enters the stage of soil filtration. Here, the liquid passes through the filter layer, where cleaning continues, and enters the deep layers of the soil.

Anaerobic septic tank

Bacteria for septic tanks