METHOD FOR THE BIOLOGICAL TREATMENT OF AN EFFLUENT AND ASSOCIATED PLANT

摘要

The invention relates to a method for the biological treatment of an effluent to be treated and containing at least two forms of pollution, one of which is more easily biodegradable than the other, which comprises using a main biological treatment area in which the raw effluent is contacted with biological sludge adapted for consuming a first form of pollution that can be more easily degraded than a second form of pollution, wherein said method is characterised in that comprises collecting a fraction at least of the biological sludge which is isolated at a distance from the main biological treatment area in a so-called bio-activation area and under aeration and time conditions adapted for triggering in said fraction the development of new biological functions capable of consuming the second form of pollution, and further recycling at least a portion of said biological sludge fraction towards the main biological treatment area.