BBF Structure

BBF employs physical and biological treatments using a single up-flow reactor

  • Wastewater travels down from the influent water way located on top of the BBF reactor, and it enters the reactor at the bottom of the structure
  • The hydraulic head difference creates an up-flow condition inside of the reactor and water first travels through the fixed media layer (anoxic zone) which is located at the bottom of the system
  • Floating media layer is located in the middle of the reactor and is retained by strainer block
  • Depending on the process air diffusers location relative to the floating media, oxic, anoxic, or oxic/anoxic conditions can be designed
  • The effluent waterway conveys treated water from the system and the remaining water on top of floating media is used as backwash water source without requiring pump

Concrete Type

  • Rectangular concrete structures
  • For large volume flow
  • Above ground or underground design
above ground bbf.png
under ground bbf.png
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Vessel Type

  • Cylindrical vessels (dual or quad unit)
  • For small volume flow
  • Outdoor or indoor installation
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