The shaft is mounted at
right angles to the
wastewater flow, with about
40% of the total disc area
being submerged.
• The biological growths on
the disc pass through the
wastewater, sorb organic
materials and pass through
the air.
• The biosorption and biooxidation
occur.
• Recycle is not employed.
• The growths sloughing from
the contactor are removed
by a final clarifier.