Aerobic wastewater treatment
In the aerobic treatment of industrial wastewater, atmospheric oxygen is used with the aid of bacteria for the degradation of pollutants, removing the organic substances from the wastewater. This also creates CO2 and builds on biomass as activated sludge.
An aerobic step is always necessary if the wastewater has to be purified in order to achieve the quality required for direct discharge.
The retention of sludge can be done via sedimentation as well as with membrane equipment. The classic stages include an aeration tank and a secondary clarifier. If nitrogen is found in the wastewater, an additional nitrification and denitrification is required.
A combination of anaerobic and aerobic stages is recommended for highly polluted wastewater that is discharged into an outlet channel after cleaning.
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