Screening


Primary Screens

  • Generally the first unit operation (Pre-treatment)
  • Elimination of large non-biodegradables and floating solids
  • Option of coarse screening and fine screening
  • Former used as primary protection devices, with openings of 10 millimetres or larger
  • Latter used to remove objects that might interrupt downstream processes, commonly with openings of 3 to 10 millimetres