BBF Operation

Process of BBF


Operational Mode of BBF

Operation Mode

  • Influent enters the BBF reactor from the top through the influent pipe and by gravity reaches the bottom and then flows upward through both media layers
  • Larger particles are filtered by the fixed media and the smaller particles, soluble pollutants and nutrients that pass through the fixed media layer are removed in the floating media’s biofilm
  • The treated water exits the reactor through the effluent waterway on top of the reactor
  • As the up-flow treatment process continues, headloss will be increased by the excess solid deposits

Backwashing Mode

  • Head loss is recovered by two backwash methods, gravity draining for sludge removal(fixed media) and air scouring for excess bio-mass removal (floating media)
  • Monitoring system (pressure gauge) triggers automatic backwash
  • During backwashing, the air scouring facilitates the removal of suspended solid and excess biomass from the media layer
  • Backwashing sludge drains through the backwashing channel
  • The treated water remaining over the upper strainer block will be used for backwashing driven by gravity
bbf backwash pic.jpeg
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