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)

Actiflo® Pack (MINI series)

The pre-engineered Actiflo® Pack (MINI series) is a very compact standard package plant for drinking water treatment.
Selkeytys ja flotaatio


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.


Designed to reduce the amount of sludge produced and related water losses, Actiflo® HCS (for High Concentration Sludge) is an Actiflo system equipped with an outside recycling loop.
Selkeytys ja flotaatio

ACTIFLO® Pack ACP2 (series)

The Ultimate Microsand enhanced clarifier.

ACTIFLO® Softening

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


BIOACTIFLO™ is a process designed for treatment of stormwater and reduction of its soluble BOD.
Selkeytys ja flotaatio


Veolian patentoima, tehokas selkeytysprosessi kuntien ja teollisuuden vesien kemialliseen käsittelyyn.


ACTIFLO® CARB –prosessissa yhdistyvät ACTIFLO® -selkeytyksen tehokkuus ja aktiivihiilen adsorptio-ominaisuudet poistettaessa mm. haitallisia yhdisteitä.