These are biological wastewater treatment systems.

During biological purification, biochemical destruction of organic substances occurs due to bacteria feeding on organic. The process of biochemical destruction can be natural or artificial. In the first case, we are talking about filtering fields, and in the second — about biofilters or special containers — air tanks. Thus, we have approached those wastewater treatment systems, which today are considered the most effective and are popular with owners of private houses. These are biological wastewater treatment systems.