Actiflo® Duo is a two in one ready-to-use system designed to adjust to substantial fluctuations in wastewater flows to be treated.

Actiflo® Duo can operate as a Multiflo® format (or conventional lamella clarifier) in times of low flow, such as in dry weather, or as an Actiflo®, i.e. coagulation/flocculation and settling ballasted with microsand in times of high flow, such as in wet weather.

This high operational flexibility in treatment operation is also especially important in managing excess flows during periods of heavy rainfall.



  • Exceptional treatment performance regardless of field of application.
  • Operational flexibility
  • Optimization of installed equipment at lower operating costs. 
  • Lower civil engineering costs thanks to process compactness. 
  • Easy-to-use process: simply operation demanding little attention from operators.



Wastewater primary, secondary and tertiary treatment

Some References

  • Illawarra, Sydney, Australia, 2006, 160 000 m3/day, CSO-120m/h treatment
  • Hartevann (Bykle), Norway, 2011, 5 800 m3/day, secondary treatment, MBBR-70m/h clarification
  • Tranemo, Sweden, 2004, 12 000 m3/day, CSO-89m/h tertiary treatment
  • Port Clinton, USA, 2004, 91 000 m3/day, CSO - 88m/h primary and tertiary treatment
  • Danang Beach Resort, Vietnam, 2011, 13 000 m3/day, secondary treatment /MBBR - 110m/h clarification


Actiflo® Duo Datasheet (1.45 MB)


A Veolia-patented high-performance water clarifier for municipal and industrial water treatment.
Clarification and Flotation


BIOACTIFLO™ is a process designed for treatment of stormwater and reduction of its soluble BOD.
Clarification and Flotation

Actiflo® Pack (MINI series)

The pre-engineered Actiflo® Pack (MINI series) is a very compact standard package plant for drinking water treatment.
Clarification and Flotation

ACTIFLO® Softening

ACTIFLO® Softening removes hardness and alkalinity to improve water quality for municipalities and industries.


Actilfo® Pack, a complete range of pre-engineered and standardized ACTIFLO® units. ACTIFLO® package unit treatment capacities can be as high as 2,500 m3/h.


ACTIFLO® Disc is a polishing solution designed to achieve high removal levels of suspended solids and phosphorus in municipal and industrial wastewater for water reuse.


The ACTIFLO® CARB process combines the features and the efficiency of ACTIFLO® with the adsorption qualities of activated carbon to remove compounds that are refractory to water clarification.