Removing and refurbishing biofilters in Annecy (FR)

Removing and refurbishing biofilters in Annecy (FR)
Filtralite Clean - Case study
Removing and refurbishing biofilters in Annecy (FR)
Removing and refurbishing biofilters in Annecy (FR)
Removing and refurbishing biofilters in Annecy (FR)
Removing and refurbishing biofilters in Annecy (FR)
Filtralite Clean - Case study
Removing and refurbishing biofilters in Annecy (FR)
Removing and refurbishing biofilters in Annecy (FR)
Removing and refurbishing biofilters in Annecy (FR)

Filtralite® Clean, an exclusive material for wastewater fixed bed technology

The biofilters, in use at Annecy´s wastewater treatment plant (SILA), have been filled with Filtralite (initially implemented under the name Biolite® in the Suez-patented BIOFOR®), offering optimum conditions for biofilm growth in the biological treatment of wastewater.

Lightweight and porous, Filtralite® Clean, made of particles of expanded clay, features angular and sharp faces and a high specific contact area. These properties facilitate an efficient bacteria development for BOD (Biochemical Oxygen demand) removal, TSS (Total Suspended Solids) removal and nitrification process.

 

Filtralite®, a solution easy to implement

The Annecy Wastewater treatment association (SILA) awarded Quadrimex Chemical the contract to drain, refill and replace the filtration media of 3 biological filters in the SILOE plant (230 000 population equivalent).

Quadrimex Chemical managed to renew the filter media of 3 biological filters in only 12 weeks. The company developed an innovating pumping system (based on Venturi effect), non-polluting and noiseless. This system is made to drain the biological filter in order to insure the maintenance of the equipments.

Three biological filters had to be drained for maintenance : 2 filters N (Nitrogen) and 1 filter C (Carbon).

Thereafter, the equipments were refilled with :

  • the re-use of the same filtration media recovered from the draining,
  • and new Filtralite Clean media.