Special features of the concrete ring cleaning facility
When stacking the elements of the walls of the well one on top of another, a septic tank of concrete rings is formed before the formation of a reservoir of the required volume. A scheme of this type avoids the deformation of the structure as a consequence of the external impact of groundwater and soil on it. But the use of large equipment during the construction process, as well as the lack of tightness of the connections between the rings, are drawbacks of this technical solution.
- wastewater treatment plant The lower part of the structure consists of a concrete well, the bottom of which is a concrete slab. A drainage pipeline with a slope of 2 cm per running meter to the side of the structure is connected to the tank. At this stage of purification, organics decay with the help of vital processes of special microorganisms. The layer of recycled contaminants settles to the bottom, and the wastewater enters the second
- . The second stage construction is similar to the previous one, however, the reservoir is slightly smaller in size. At this stage, the effluents are filtered through special materials - gravel, expanded clay, rubble.
- The last process that completes the purification cycle is drainage of drains( drainage through the drainage well into the soil, using pumping units, or resorting to the services of sewers).
Specifics of the construction of septic tanks
In order to avoid deformation of the structure during its operation because the soil has the property of swelling, it is necessary to build a expanded or crushed stone, as well as a cushion of sand before installing the wells. The backfilling should be no less than 30 cm in thickness.
It is very important to carry out waterproofing works qualitatively, as it is necessary to ensure safety for the environment when using the structure. Insulation is carried out with the help of special compounds both from the outside and from the inside, as the fecal drains are very aggressive and cause the concrete to corrode.
- Waterproofing of external walls is carried out using a roofing material or mastic
- Internal insulation is made with liquid glass or special mastics.
Each section of the treatment plant is equipped with inspection hatches for inspection, maintenance and repair.
Determination of the volume of the structure
V =( N * n * 200l) / 1000 [cu.m], where
- V is the required volume of a septic tank, cu.m
- N - number of users by the sewage system
- n - time for wastewater treatment in the septic tank, 3 days
Alternative technical solutions
To construct a sewerage system on the site, there are other technical solutions similar to the septic tank of concrete rings. The scheme of sewage treatment in them is similar, they differ only in construction.
To build a monolithic concrete septic, you will need to purchase several rings for the walls of the well, a concrete solution, a strong polymer, metal and bricks. First, earthworks are done, then the pipes and the formwork are laid, and then the concrete is concreted.
To ensure the uniformity of the drying of the concrete, it is occasionally wetted with water and covered with oilcloth.
Install the wells, the septic tank is covered with a concrete slab with holes for manholes and inspection pipes. So, as in self-made septic tanks there is no necessary filtration system, anaerobic bacteria are added to activate the process in them.
In order not to construct self-contained septic tanks, you can purchase ready-made structures, like Topas or Tank. Their installation is much easier and faster, and the cleaning effect is much better than the simple options.
An excellent technological solution for sanitation is a septic tank made of concrete rings. The scheme of this wastewater treatment plant is simple, but its use is very suitable for treating effluents in private plots.
