Food grade low density polyethylene beads are used as biomedia. The Bacterial Consortium grows as biofilm on the beads and removes Ammonia, Nitrites and Nitrates.
The beads have a diameter of 5mm and a surface area of about 0.785cm2
Stringed Bed Suspended Bioreactor contains 1001 beads with a surface area >684cm2.
Packed Bed Bioreactor contains 60 kgsof beads with a surface area of about 28.26m² and specific surface area of about 205 m²/m³.