Actiflo- The Ultimate Clarifier

Actiflo is a compact process that operates with microsand (Actisand) as a seed for floc formation. The microsand ballasted flocs display unique settling characteristics, which allow clarifier designs with very high overflow rates and short retention times. These designs result in footprints that are 5 times smaller than classic lamella clarifier or dissolved air flotation (DAF) and up to 20 times smaller than conventional clarification systems.

Actiflo- The Ultimate Clarifier

Actiflo applies to both surface and ground water where improved performance and/or capital cost reduction is desired.

It is ideally suited to the treatment of :

  • rapidly fluctuating water sources,
  • low temperature water (1┬░C),
  • reservoir water with very low turbidity,
  • sea or brackish water.

Through the use of Actisand, Actiflo achieves better performance than all existing clarification processes, displaying consistent removal of :

  • turbidity, color, total organic carbon (TOC),
  • algae, particle count, pathogens, cryptosporidium,
  • oxidized iron, manganese and arsenic...

Actiflo is particularly efficient to remove taste and odor associated with algal bloom.
It can also be used for the recovery of backwash water from rapid gravity filter thus reducing water loss and running costs.


Actiflo can be used in most municipal applications:

  • Primary settlement: due to the mass of microsand constantly in the process, Actiflo handles very swift raw water quality variations and rapid flow changes
  • Treatment of biofilter backwash water: due to its short residence time, the biological sludge is unlikely to go septic; it is therefore clarified extremely efficiently, with superior levels of treatment compared to flotation
  • Clarification of trickling filter effluents, in replacement of a conventional clarifier
  • Stormwater treatment (combined sewer overflow): Actiflo treats storm peak flows as they occur. In combination with UV disinfection (Actistar), it delivers an effluent compliant with the most stringent bathing and shellfish water directives
  • Tertiary polishing or phosphorus removal: whether it is used for suspended solids, color or phosphorus removal, Actiflo meets or exceeds water quality standards with removal rates usually higher than 90%. The same Actiflo unit applies to storm flow treatment in peak flow and to tertiary treatment in dry flow conditions, with a significant removal of hormones (endocrine perturbators) for the latter
  • Water reuse for crop irrigation or aquifer recharge, in combination with Discfilter and UV disinfection (Actidisc Plus)

Industrial water and effluents

Actiflo is an ideal solution for the recycling of process water and pre-treatment of boiler feed or cooling tower make-up water.

Similarly it treats any type of process water as well as most industrial effluents.

  • Solids and color removal: prior to membrane treatment, reverse osmosis (Actimem), or in combination with Discfilter (Actidisc), to produce process water for the pulp & paper or food industry
  • Removal of heavy metals (lead, cadmium, zinc...) and ashes from power plant and steel mill effluents, or polishing treatment to remove suspended solids and associated pollutants
  • Lime soda softening (Actisoft) for the production of demineralized water

The Actiflo Family

Actiflo Pack
For small to medium-sized applications (1 000 to 10 000 m3/d), a range of package plant solutions has been designed, also providing built-in sand filtration (Actifloc) or sludge thickening (in combination with Actidyn) when required.

Actiflo Turbo
Second to none experience in clarification / settling. Since it was launched in 1989, Actiflo has been constantly improved to optimize its performance and applications. With more than 450 installations throughout the world, Veolia Water Solutions & Technologies possesses unequalled experience allowing it to develop and exclusively patent a new generation : Actiflo Turbo.

Actiflo Carb
Actiflo Carb combines the Actiflo process advantages with the adsorption capacities of the Powdered Activated Carbon (PAC) to remove emerging pollutants and pesticides present in natural water resources.

Actiflo Mobile Plant
The compactness and versatility of Actiflo enable to built trailer mounted units which can handle very large flow and a huge range of raw water qualities.

Actifloc Pack
The pre-engineered Actifloc Pack combines clarification and filtration in one pre-fabricated, fully automatic unit.

Actiflo® Softening
Hard water softening (calcium, magnesium and silica removal).

N.B. The information contained in this entry is provided by the above supplier, and does not necessarily reflect the views and opinions of the publisher