After a first settling and/or screening treatment, wastewaters (grey) to be treated (civil, industrial, domestic) are pumped into equipment modules.
By the wastewaters contact, plastic carriers are covered by a bacterial biological film. Bacteria are nourished by the organic substance dissolved into the water, purifying it.
Purified waters can be released in water bodies without harming water bodies or on the ground.
A stainless-steel cell, full of plastic carriers of different dimension, slowly rotates partially submerged inside a tank, where there are wastewaters to be purified. Plastic carriers spontaneously form a bacterial film that progressively presents, at first, heterotrophic bacteria development which are able to nourish of organic carbon pollutants; then the decrease of COD and BOD concentration and then the development of autotrophic bacteria. They belong to the nitrosomonas and nitrobacter category and they are able to oxidize ammonium, transforming it into nitrites and nitrates. The cell containing the carriers can be flooded as needed; in this way the depuration process control is obtained and it can be oriented both to the carbon removal and wastewaters denitrification.
These plants, do not need any blower for the bacteria film oxygenation. It's the slow reactor rotation – alternatively submerged into sewage and into atmosphere – to guarantee the adequate oxygen supply for the oxidation aerobically of the sewage made by the biological film attached to the carriers. In this way it is possible to obtain a huge reduction of functioning and operating treatment costs.