The trickling filter tower is an attached growth system using cross-flow
plastic media to support the growth of a biomass slime layer. Different types of
bacteria will grow on the layer:

  • The inner layer consist of mainly anaerobic biomass
  • The outer layer is predominantly aerobic biomass

Wastewater is pumped to the top of the tower from where it is sprayed down
onto the media. It then trickles down the tower. The trickling filter tower can also
assist in cooling down the wastewater to the temperature for optimum bacterial


Trickling filter wastewater distribution system

Trickling filter tower