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Aërobic biological treatment

Aërobic biological treatment

An aerobic biological treatment process takes place in an oxygen-rich environment: biologically degradable substances are decomposed by micro-organisms and converted into carbon dioxide and new biomass, amongst other things; such a system is also called an active sludge system. Besides the decomposition of organic constituents, nitrogen (ammonia and organically bound nitrogen) can also be biologically decomposed into nitrogen gas (partly anaerobic). biorotor_2
Oxygen can be introduced into an active sludge system artificially (aerated tank: bioreactor) or naturally using a bio-rotor (the introduction of air through rotors of biomass attached to carrier material).