Sens techniqueAll biological, chemical or physical processes enabling an ecosystem (river, water body, sea and ocean, etc.) to transform the substances, most often organic, that it produces or which are brought up from the outside. Organisms living in aquatic environments play a significant role in this process (bacteria, protozoa, algae, fish, etc). Self-purification is limited: if discharges concentrated in organic matters exceed a certain threshold, the natural self-purification capacity is exceeded and pollution persists. Moreover, the presence of toxic substances can inhibit the phenomenon of self-purification.
According to the Ministry for the Environment and AFB
Soumis au comité de relecture.