To ensure comfortable conditions in a country house, a reliable sewerage system is necessary, which can only be created by a septic tank without pumping out. In such devices, there are no anaerobic processes, therefore hydrogen sulphide is not formed during operation, which, in turn, leads to absolute safety. These units are fairly simple to use. They need to be cleaned during the year only a few times. Therefore, a septic tank for a dacha without pumping becomes an optimal solution, allowing effective disinfection of water. Its use allows to save considerably on electric energy and pumping out.
However, even a septic tank without pumping can not completely recycle waste discharges, since household waste includes not only organic substances that are prone to biodegradation. Also in the drains there are a number of impurities that do not dissolve in the water at all. Therefore, after some time there is still a sediment accumulating in special chambers. Remains of such impurities must be eliminated sooner or later. However, this is much less frequent than pumping out sewage from a conventional cesspool.
In order to understand what a septic tank is without pumping it is necessary to consider the standard operating principle of deep wastewater treatment stations . They include: feeding tube, septic chamber, aerator, biogenerator, secondary and tertiary settling tanks and a discharge pipe. Although these installations are called autonomous, they assume the presence of electrical power for full-fledged operation. It is due to the current that compressors supply air to the aerators. In some units, water is pumped by airlifts, but they also depend largely on electricity.
When the septic tank is running without pumping, all drains are directed to the receiving chamber, which is usually larger than the rest. Its task is to accumulate household waste in the form of a liquid and to participate in the clarification of water. In the upper layers are collected light impurities like fats and insoluble carbohydrates. After a certain time their structure changes. Thus, the main part under the influence of yeast passes into a soluble form, and the other precipitates. Impurities that are heavier than water fall to the bottom and fall under anaerobic decomposition. Clarified water is gradually transferred further.
Once or twice a year, septic tanks are pumped out. The price of devices plays a big role in the number of operations that can be carried out by themselves. In extreme cases for this there are many services involved in servicing such sewers. At a certain time, specialists will come and use the drain pump to empty the contents of the sump. After flushing with a special device, the unit is again ready for operation. Of course, the cost of devices that do not require frequent pumping is much higher than simple sealed containers.