We have already told our readers about. The modern market offers many ready-to-use wastewater treatment systems, but users of the site, owners of country houses, prefer to roll up their sleeves and.
One of the most popular schemes for a local treatment system, or VOC for short, is a concrete septic tank made of rings - a three-chamber system interconnected by overflows. With this scheme, the first, storage, chamber is made with a sealed bottom, and the other two are used for additional purification of the drain. This article covers the following aspects.
- Disadvantages of the traditional scheme;
- Sealing joints;
- Waste disposal;
- Innovative post-treatment scheme.
Disadvantages of the scheme
A simple septic tank system made of rings has been worked out over the years, has more than once proven its effectiveness in areas with low groundwater table... However, a forum user with a nickname Khozain2000 recommends improving it by slightly changing the principle of operation.
Khozain2000:
- Before starting the construction of the sewerage system, I shoveled a lot of information on the forum. In my opinion, there are three main drawbacks to the standard ring septic tank scheme:
- leaky bottom of the pit at the first storage tank and poor sealing of the joint surfaces;
- the possibility of shifting the chambers and destroying the seams due to the forces of frost heaving;
- high costs for the device of filtration fields.
Consider the improvements suggested by the forum member.
Sealing joints
The problem of sealing a septic tank from concrete rings Khozain2000 decided this way. He bought factory rings and a quarter - these locks on the products prevent the rings from shifting. Before proceeding with the installation of the septic tank and starting to install the rings, the forum member from all sides, in three layers, treated them with a waterproofing mixture. And when installing the rings, to seal the joints, I added "liquid glass" to the solution.
The bottom was sealed in two stages:
- Pouring a reinforced screed under the ring, the thickness is 5-7 cm.
- Treatment of the screed with a waterproofing mixture and installation of another screed on top.
Khozain2000:
- Because lining waterproofing does not work well for separation, and water creates pressure in both directions, then a screed should be necessary on one and on the other side.
To make the most of the useful volume of the ring septic tank, the cameras were installed more than 80 cm below ground level. Then the member of the forum put polymer-sand cones on this base and laid out cylinders from bricks along the ground level, on which he then put covers (hatches).
An interesting point of view of a forum user with a nickname DmitryM on the need to seal the rings.
In his opinion, it is almost impossible and unnecessary to achieve perfect sealing of the joints and the bottom.
And the process of small seepage of sewage into the ground will first stop by itself within a year of operation.
Khozain2000:
- I think that sealing is still important and here's why. In the spring, when the snow melts, there is a lot of top water. If the receiving well and the sump are leaking, then the melt water will flow into them and flood the septic tank.
In this case, the ring septic tank will cease to perform its functions.
Insulation of a septic tank
Insulation of the septic tank may be excessive.
DmitryM:
- It is my deep conviction that it is practically impossible to freeze a working septic tank from rings near Moscow.
So that in winter the concrete rings do not move under the influence of frost heaving forces, Khozain2000 decided to insulate the structure.
- I did not insulate the entire septic tank, because it really does not freeze. And I insulated only the neck outside, I chose a special material - a soft polyurethane foam insulation. After all, if it rises in frost, then in the spring melt water can get into the septic tank and flood it.
As the last winter has shown, this method has fully justified itself.
Waste disposal
When constructing a septic tank from rings, one of the main issues is the disposal of wastewater obtained at the exit from the third tank.
Even if the liquid after the filtration tank is transparent and odorless, it is full of bacteria, including those hazardous to health. Therefore, this water still has the main path - soil tertiary treatment.
In order to further purify the water, they arrange filtration fields in the place where the drain is discharged. This leads to additional excavation work, and after a few years the soil in such a field may become silted up, and it will have to be excavated and cleaned.
And then it dawned on this brilliant man.
Khozain2000:
- I thought that the space around the wells themselves could be used to create a filtration field.
To implement this good idea, the forum member dug a fairly large pit for the rings; the size is wider than the rings themselves by about 0.4-0.5 meters. After that, I installed the rings and sprinkled them with rubble and sand.
In order for the water to better leave the drainage tank into this "pillow", it is necessary to drill holes in the walls or install ready-made reinforced concrete rings.
Khozain2000:
- I checked the tightness of the wells before putting the septic tank into operation, pouring water into the wells one by one for a week. In sealed wells, the level did not change, but the drainage water left. The very first winter and spring showed that.
To pump out water from the drainage well, the forum member installed a drainage pump in it.
This pump is necessary in case of abundant volley discharges, or if in the spring the drainage well is flooded with overhead water.
In the opinion of the forum member, since water is discharged only in spring, the concentration of pollutants in the so-called gray runoff, which is highly diluted with verkhvodka, is insignificant.
One of the problems of winter operation of a septic tank made of reinforced concrete rings with a drainage pump can be freezing of water in the pipe, which leads to an ice plug. Usually, to get out of this unpleasant situation, a heating cable is installed that is connected to the electrical network. A forum member came up with another option:
Khozain2000:
- I made a bias towards the pump and properly insulated everything. Therefore, after turning off the pump, the water remaining in the hose flows into the well without having time to freeze.
Summarizing
To summarize, we can say that even a well-proven circuit can be improved. Success depends on the willingness to experiment and approach everything soberly!
At FORUMHOUSE you will learn how to build in 10 days, get acquainted with a collection of misconceptions and mistakes associated with construction and find working circuits of a septic tank made of rings. Read the story about the construction.
And after reading these topics, users of our site will find out, and.
