Technology
BBF Structure
Physical & 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

Underground BBF
Above Ground
1. Influent Waterway
2. Influent Pipe
3. Fixed Media
4. Floating Media
5. Strainer & Block
6. Treated Water for Backwashing
Underground
7. Effluent Waterway
8. Backwashing Channel
9. Main Air Pipe
10. Process Air Pipe
11. Backwashing Air Pipe
12. Maintenance Walkway
Vessel Type
Cylindrical vessels (dual or quad unit)
For small volume flow
Outdoor or indoor installation

Distribution Box
Influent Pipe
Fixed Media
Floating Media
Strainer
Treated Water for Backwashing