Main characteristics of cesspools and calculation rules
It is a specially equipped reservoir that provides collection and recycling of waste.
Sewer types:
- hermetic;
- absorbing.
When choosing a sewage take into account the average daily amount of incoming liquid waste.
Brief description and calculation of the isolated pothole pit
This type is a sealed vessel, most often a plastic barrel, previously dug into the ground.
Advantages:
- It is possible to have only 5 m from the house.
- This is an ecological way of collecting waste, since they do not contact the soil, so they do not pollute it.
- This design does not provide drainage to the ground, therefore suitable for areas with high humidity and any soil.
- Very easy to install. Suffice it to lower the vessel, onto a previously prepared pillow of sand and gravel.
The downside is quite expensive maintenance, due to the frequent call of the sewer machine.
Answering the question: how to calculate the volume of a cesspool, it is worth paying attention to such facts:
- Number of permanent residents;
- The volume of the machine for pumping.
- Regularity of pumping out waste.
Volume calculation formula:
V = number of days x number of persons x V day / person
where:
- V - required dimensions of the sewage well;
- number of days - number of days between pumping out( bi-weekly);
- number of people.- the sum of permanently living people;
- V day / person - liters of fluid per day, used by one person.
Let's say that there are three adults in the house. It turns out that the container must be at least 6750 liters.
When calculating the ideal cubic capacity of a cesspool reservoir, it is necessary to take into account the emergency reserve, capable of helping out if it is not possible to routinely drain the effluent.
Calculating the dimensions of the drainage pit
The cubing of the well for waste fluids directly affects its parameters. If the tank size is calculated for three persons( 6750 l. + Reserve), the parameters can be as follows:
- length is 2, 5 m.
- width is 1, 8 m.
- depth is 2, 5 m.
The cesspool should not bedo deeper than three meters. This is due to the fact that the sewage machine has a hose equal to three meters. The pit is positioned so that it is accessed.
Description and calculation of a filter cesspit without a bottom
A distinctive feature of the filtration sump is that part of the liquid is cleaned and leaves in the ground. In this regard, there are rules that should not be violated when choosing a location. It should be located no closer than 5 m from the house, 30 m from the well and at least 1 m before the fence.
A sump without a bottom should be used only if no more than 1 cubic meter of wastewater is generated per day, otherwise the soil will not cope with their cleaning.
During construction, the septic tank needs to be thought over so that it is covered with a dense lid, which protects from freezing and ingress of rain and meltwater.
Calculate the dimensions following the same formula as for the hermetic. Answering the question: how to calculate the volume of the cesspool, you need to take into account that its minimum cubic capacity was more than the volume of drains per day three times.
Materials for a cesspool. Example calculation. Materials
The main building materials for the removal are:
- Reinforced concrete rings;
- Bricks;
- Slag block;
- Concrete;
- Eurocubes;
- Plastic containers.
Example of calculation
For an example, let's give a calculation of a cinder block for a septic tank, 2 m in size.on 2m.on 3m.and cubic capacity of 18 m.
For laying the cinder block, concrete is required.
To subtract the required amount of materials from the height of the walls, subtract the thickness of the bottom and top.
The overlap is carried out at 0.4 m below the ground level and is insulated to prevent freezing.
Published: 3m.- 0,15m.(overlapping) -0,1m.(bottom) - 0,4 m( backfilling) = 2,35 m.
Then the resulting figure of wall height is divided by the thickness of the raw materials used, taking into account the seam. So we get the number of rows. Then, by the same principle, we compute the calculations to the end.
After all calculations have been made, the missing materials have been purchased, you can start building a cesspool.
