Product/Service

Biostyr® Biological Aerated Filter

Source: Veolia Water Technologies

Biostyr® Biological Aerated Filter
BIOSTYR® is a simple and innovative process, which carries out effective biological treatment of residual water at minimum operating cost. Highly compact, BIOSTYR® combines (in a single structure), the biological reactor that degrades pollution and the phase separation that removes the matter transformed by purification.
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Datasheet: Biostyr® Biological Aerated Filter

BIOSTYR® is a simple and innovative process, which carries out effective biological treatment of residual water at minimum operating cost.

With more than ten years experience in the field of submerged biofilters, OTV has installed approximately one hundred reference plants (in France, Europe, North America and Japan), one of these being the BIOSTYR®. This process was originally developed for nitrogen elimination in secondary and tertiary treatment and is capable of attaining the highest discharge quality standards.

Highly compact, BIOSTYR® combines (in a single structure), the biological reactor that degrades pollution and the phase separation that removes the matter transformed by purification.

Basic Principles
The BIOSTYR® process consists of upflow filtration through a submerged and floating fine granular medial called BIOSTYRENE. Air is injected either to the base of the bed or into the media itself. In the latter case, the filter can simultaneously nitrify and denitrify. It is capable of eliminating all biodegradable pollutants: carbon pollution (COD and BOD), suspended solids (SS), ammonia (N-NH4) and nitrates (N-NO3).

The bacteria present in the effluent to be treated attach themselves to the BIOSTYRENE that simultaneously acts as a filter. The pollution is broken down into cellular material, which is retained in the filtering bed by physical retention.

In contrast with other upflow filters (where the media is denser than water) the head loss in the filter ensures that the effluent to be treated is equally distributed without the need for nozzles (which are likely to become clogged) or distribution pipework, and without the need to sieve the effluent before treatment.

Filtration takes place in a direction that compacts the media rather than expanding it, thus enhancing the capture of the suspended material. Periodic counter-current washing eliminates excess biomass and suspended solids filtered, without passing it through the whole bed. Downward flushing evacuates residues by the shortest route out of the bed, and the direction that the particles fall.

The BIOSTYRENE media is retained by the cell roof, which is fitted with nozzles (removable from the top face) that are only in contact with purified water and easy to access.

These characteristics are essential to achieving a reliable process protected from any risk of excessive clogging.

Click Here To Download:
Datasheet: Biostyr® Biological Aerated Filter

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