Paramecium spp.

Free-floating ciliates

  • 100 – 300 µm
  • oval cell shape, often asymmetrical and similar to a shoe sole
  • central chewing apparatus
  • two contractile vacuoles on posterior and anterior parts of the body
  • cilia evenly distributed over the body

 

IN ACTIVATED SLUDGE:

  • with low sludge load
  • with low oxygen content