We described it in the first part of our article series, why and when it is worth using a biological sewage treatment plant, we examined the wastewater and its components. In today's article, we will talk about the operation of the wastewater treatment plant and the process of wastewater treatment.
Operation of the wastewater treatment plant
Wastewater treatment in larger settlements, in villages, in cities, it usually takes place at a sewage plant, However the 2000 in settlements with a population of less than one person, the installation of a domestic sewage treatment plant is the most economical way of final treatment of sewage.
A professionally installed and maintained home sewage treatment plant can operate with enormous cleaning efficiency.
The built-in sewage treatment plant consists of several parts, the very first phase is the dissolution pool, which consists of several chambers and whose task is phase separation. During the phase separation, the in the wastewater, particles with a higher specific gravity than water settle, while particles with a lower specific gravity than wastewater (pl. fats, oils) they rise to the surface of the water, thereby creating a floating crust. Bacteria that break down organic matter in the water quickly absorb the dissolved oxygen in the water, so biological changes without oxygen, they take place with the help of other bacteria.
There are flow-through openings between the chambers of the solution pool, which, due to their design, filter mud and sediment, so it does not pass into the next chamber.
Biodegradation is not completed in the dissolution pool, therefore, dissolved water cannot be released into living water, this is what the additional pools are for.
The water from the solution pool goes to the filter field, where biodegradation continues. The microorganisms found here live on the soil particles living in the tunnels and feed on two different substances: with air, which is obtained from the soil during the sewage-free period, and with dissolved substances extracted from wastewater. Bacteria in the soil extract most of the impurities, so they no longer contaminate the groundwater. This process also shows, why toxic substances should not be introduced into the waste water, because the various toxic substances kill the beneficial bacteria in the soil, thereby inhibiting the biological process of wastewater treatment.
Maintenance
The filter field, exhaust system is continuous, perfect functioning of the solution pool is essential for its trouble-free operation, for which regular maintenance is essential. A swimming pool full of sand and silt is incapable of settling fresh sewage, therefore, it clogs the gaps between soil particles, as a result of which the water permeability of the screed field decreases, the bacteria participating in the decomposition of organic matter do not get enough oxygen, therefore they perish.
Because it is a biological process, therefore, the entire swimming pool should not be vacuumed, a minimum of 10% of the sludge found there must be left in the dissolution pool as extinguishing sludge, due to the maintenance of the microorganism culture there.
It can also be seen from this process, that the domestic biological sewage treatment is a really useful biological process, which, with professional installation and proper maintenance, is worth the investment!
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