[ Product listing ](/solutions/technologies-water-wastewater-treatment " Product listing") #### A range of products offering a high-rate and compact water clarification process for the production of drinking water, process water and the treatment and reuse of wastewater. [Contact an expert](https://www.veoliawatertechnologies.com/en/contact) [Overview](#1) [Applications](#2) [Services](#3) [Product range and Resources](#4) [Contact](#5) [Case Studies](#6) ## Overview **Water clarification** is a fundamental step in water treatment to remove suspended solids from water and in wastewater treatment. Offering **high-rate clarification**, Actiflo is a family of products designed specifically for compact water and wastewater clarification processes. For the production of [drinking water](/applications/drinking-water "Drinking water") and [process water](/expertise/applications/process-water-0 "Process water"), Actiflo treats surface water, [groundwater](/applications/groundwater-treatment "Groundwater treatment"), seawater and brackish water. This ability is vital as drinking water treatment plants adapt to the impacts of climate change such as **storm events** and the growing importance of alternative raw water sources. To ensure water standards are maintained, Actiflo increases the settling speed compared to conventional settling and allows treating a flow rate up to 10 times higher than the sludge bed process. It is particularly effective in eliminating turbidity, natural organic matter, color and algae. For the specific needs of industry, Actiflo is also suitable for the treatment of cooling tower make-up water and boiler feed pretreatment. For municipal and industrial wastewater, Actiflo can be implemented at all stages of the treatment of municipal effluents, including primary and secondary clarification, tertiary polishing and wastewater reuse. ### How does Actiflo work? Actiflo is a **high-rate** water clarification system based on Veolia’s patented ballasted flocculation process. It enhances flocculation using microsand and polymers to increase the weight of flocs, allowing for significantly faster settling of up to 40 to 100 times faster than conventional clarification methods. This technology is essential to the production of potable water (or drinking water), enabling the rapid delivery of high quality water to meet growing demand. Suitable for both municipal and industrial applications, Actiflo effectively removes toxins, organic matter, heavy metals, ash, and coal fines. It ensures safe and compliant water across a range of industries, including [pharmaceuticals](https://www.anz.veoliawatertechnologies.com/core-markets/pharmaceutical-cosmetics), [food and beverage](https://www.anz.veoliawatertechnologies.com/core-markets/food-beverage), [power](https://www.anz.veoliawatertechnologies.com/core-markets/power), [mining](https://www.anz.veoliawatertechnologies.com/core-markets/power), and [chemicals](https://www.anz.veoliawatertechnologies.com/expertise/core-markets/oil-industry-downstream). [Do you have a question about this technology? Ask an expert.](https://www.veoliawatertechnologies.com/en/contact) ![](/sites/g/files/dvc3496/files/styles/media/public/image/2023/02/Actiflo-new.jpg.webp?itok=_O3QAhiR) **Actiflo has been exclusively developed and patented by Veolia Water Technologies and has been in use for over 30 years. There are more than 1,100 Actiflo references all over the world featuring more than 1,800 units, including more than 900 package plants, in municipal and industrial water and wastewater applications.** **Features and Benefits** ![optimisation picto](/sites/g/files/dvc3496/files/styles/default/public/image/2021/11/optimisation-picto.png.webp?itok=pZuGbYTO) **Fast and flexible**: A compact water and [wastewater treatment solution](https://www.anz.veoliawatertechnologies.com/expertise/applications/wastewater-treatment) ideal for diverse applications in both municipal and industrial sectors. ![ENERGY EFFICIENCY WATER CYCLE picto](/sites/g/files/dvc3496/files/styles/default/public/image/2022/06/ENERGY-EFFICIENCY-WATER-CYCLE-picto.png.webp?itok=E_A6BdIR) **High-Performance:** Removes turbidity and suspended solids (TSS) by up to 99%, treating all types of water and wastewater. ![air fine particules picto](/sites/g/files/dvc3496/files/styles/default/public/image/2021/11/air-fine-particules-picto.png.webp?itok=VjO4NbRR) **Safe and Efficient:** Effectively neutralises harmful toxins to secure drinking water production. ![Digital picto](/sites/g/files/dvc3496/files/styles/default/public/image/2021/11/digital-picto.png.webp?itok=BpLNFGsK) **Rapid Deployment:** Achieves optimal treatment performance in just minutes. ![](/sites/g/files/dvc3496/files/styles/default/public/image/2023/01/Grey---Productivity---New1.png.webp?itok=QmftqirE) **Robust and Adaptable:** Handles fluctuations in water flow and contaminant load with ease. ![](/sites/g/files/dvc3496/files/styles/default/public/image/2023/01/Grey---Smart-industry-Picto.png.webp?itok=YcFuJIL_) **Customisable:** Wide range of options to enhance system monitoring and efficiency. ![](/sites/g/files/dvc3496/files/styles/default/public/image/2023/01/Footprint-picto1.png.webp?itok=ia5I425U) **Cost-Effective:** Its small footprint reduces construction needs and water usage, supporting sustainable wastewater management. ## Applications [ ![](/sites/g/files/dvc3496/files/styles/content_push_teaser/public/image/2019/05/Drinking-Water-Push.jpg.webp?itok=_OYxn6ux) ](/applications/drinking-water "Drinking Water") [Drinking Water](/applications/drinking-water "Drinking Water") Municipal drinking water systems and management of surface and ground water. [Learn more](/applications/drinking-water) [ ![Two workers wearing helmets, masks and gloves in a wastewater treatment plant. © Médiathèque VEOLIA - Jérôme Sevrette / ANDIA](/sites/g/files/dvc3496/files/styles/content_push_teaser/public/image/2022/05/VEOLIA_StJeanLaPoterie_JeromeSevrette_Andia_52.jpg.webp?itok=y_vtz3CA) ](/applications/industrial-wastewater-treatment "Industrial wastewater treatment") [Industrial wastewater treatment](/applications/industrial-wastewater-treatment "Industrial wastewater treatment") Technologies, services and process expertise to meet environmental requirements, remove contaminants and transform wastewater into a resource. [Read more](/applications/industrial-wastewater-treatment "Industrial wastewater treatment") [ ![](/sites/g/files/dvc3496/files/styles/content_push_teaser/public/image/2023/04/Municipal-wastewater.jpg.webp?itok=_bOhvDQK) ](/applications/municipal-wastewater "Municipal wastewater treatment") [Municipal wastewater treatment](/applications/municipal-wastewater "Municipal wastewater treatment") Optimized management of effluents and wastewater. [Read more](/applications/municipal-wastewater "Municipal wastewater treatment") [ ![Water reuse Content push](/sites/g/files/dvc3496/files/styles/content_push_teaser/public/image/2022/03/Istres%20EU%20Reuse.jpg.webp?itok=g1C-wt7_) ](/applications/reuse "Water reuse") [Water reuse](/applications/reuse "Water reuse") Solutions allowing the use of treated wastewater for beneficial purposes. [LEARN MORE](/applications/reuse) [ ![stormwater content push picture](/sites/g/files/dvc3496/files/styles/content_push_teaser/public/image/2022/06/RAMSES%2005%20copie.jpg.webp?itok=mCt47b1k) ](/applications/stormwater-management "Stormwater management") [Stormwater management](/applications/stormwater-management "Stormwater management") Solutions for the control, interception and clarification of stormwater [Read more](/applications/stormwater-management "Stormwater management") ## Services Veolia offers full lifecycle support including factory acceptance testing, installation, and logistics. Additional services include: [ ![Hubgrade make your ressources smarter banner ](/sites/g/files/dvc3496/files/styles/content_push_teaser/public/image/2021/12/210394_VWT_CORPOC_HUBGRADE_web_banner_1542x528.jpg.webp?itok=wIDHby4A) ](/hubgrade-digital-solutions "Hubgrade digital solutions") [Hubgrade digital solutions](/hubgrade-digital-solutions "Hubgrade digital solutions") A combination of digital tools and Veolia expertise that make all your water processes smarter, safer and more sustainable. [LEARN MORE](/hubgrade-digital-solutions) [ ![](/sites/g/files/dvc3496/files/styles/content_push_teaser/public/image/2022/07/MWS-Push-2_0.jpg.webp?itok=HTRsdhXH) ](/services/mobile-water-services "Mobile Water Services") [Mobile Water Services](/services/mobile-water-services "Mobile Water Services") Rental assets to support and assist your site operations for temporary and longer-term water treatment needs 24/7. [LEARN MORE](/services/mobile-water-services) [ ![Man walking near Hydrex Chemicals cans](/sites/g/files/dvc3496/files/styles/content_push_teaser/public/image/2021/04/Hydrex-push.jpg.webp?itok=R9UV9bW_) ](/services/water-treatment-chemical-programs "Water Treatment Chemical Programs") [Water Treatment Chemical Programs](/services/water-treatment-chemical-programs "Water Treatment Chemical Programs") Providing water hygiene and HYDREXⓇ chemical solutions serving the performance of utility and water treatment equipment. [Learn more](/services/water-treatment-chemical-programs) ## Product range and Resources Product range [ ![actiflo mini hero banner](/sites/g/files/dvc3496/files/styles/vwt_product_content_push/public/image/2020/01/ACTIFLO%20MINI%20left%20view.png.webp?itok=1FzdwVhl) ### Actiflo® Pack Mini A very compact and fully standardized clarifier package plant used for various applications such as drinking and process water, municipal and industrial wastewater and reuse. Its net flow is from 3 to 7 cubic meters per hour (m3/h) (drinking and process water) and from 3 to 15 m3/h (wastewater). Sedimentation - Clarification - Flotation ](/technologies/actiflo-pack-mini) [ ![](/sites/g/files/dvc3496/files/styles/vwt_product_content_push/public/image/2018/12/8312_weftec1.jpg.webp?itok=_qoj_kFT) ### BIOACTIFLO™ BIOACTIFLO™ is a process designed for treatment of stormwater and reduction of its soluble BOD. Aerobic Wastewater Treatment ](/technologies/bioactiflo) [ ![](/sites/g/files/dvc3496/files/styles/vwt_product_content_push/public/image/2018/12/Actiflo-Softening.jpg.webp?itok=GRoxbdjm) ### ACTIFLO® Softening A single compact treatment unit designed specifically to remove hardness and alkalinity to improve water quality for municipalities and industries. It combines both clarification and softening processes to achieve optimal water treatment. Softening ](/technologies/actiflo-softening) [ ![](/sites/g/files/dvc3496/files/styles/vwt_product_content_push/public/image/2021/04/Actiflo-Pack-push.jpg.webp?itok=hrELGa8p) ### ACTIFLO® Pack ACP2 (series) A very compact and fully standardized clarifier package plant used for various applications such as drinking and process water, municipal and industrial wastewater, and reuse. Its net flow is from 21 to 1,441 cubic meters per hour (m3/h). Sedimentation - Clarification - Flotation ](/technologies/actiflo-pack-acp2-series) [ ![](/sites/g/files/dvc3496/files/styles/vwt_product_content_push/public/image/2018/12/ACTIFLO.jpg.webp?itok=zrnQpOmr) ### ACTIFLO® HCS Designed to reduce the amount of sludge extracted and related water losses, Actiflo HCS (for high concentration sludge) is an Actiflo system equipped with a standard hydrocyclone and an external recirculation loop. Sedimentation - Clarification - Flotation ](/technologies/actiflo-hcs) [ ![](/sites/g/files/dvc3496/files/styles/vwt_product_content_push/public/image/2018/12/Illawara-Actiflo-Duo.jpg.webp?itok=6OFWEj4J) ### ACTIFLO® Duo A two-in-one, ready-to-use system designed to adjust to substantial fluctuations in wastewater flows. It can operate as a conventional lamella clarifier in times of low flow or as a coagulation/flocculation with settling ballasted and micro sand in times of high flow. Sedimentation - Clarification - Flotation ](/technologies/actiflo-duo) [ ![](/sites/g/files/dvc3496/files/styles/vwt_product_content_push/public/image/2018/11/actiflo_hero_banner.png.webp?itok=MnZv3qYJ) ### ACTIFLO® Disc A polishing solution designed to achieve high removal levels of suspended solids and phosphorus in municipal and industrial wastewater for water reuse. It combines two treatment processes: a conventional Actiflo phase followed by a rotating disc filter polishing system for tertiary treatment. Filtration ](/technologies/actiflo-disc) [ ![ACTIFLO® CARB at Lucien Grand ](/sites/g/files/dvc3496/files/styles/vwt_product_content_push/public/image/2018/12/actiflocarb2.jpg.webp?itok=-SH--TL9) ### ACTIFLO® Carb This technology combines the features and the efficiency of standard Actiflo with the adsorption qualities of activated carbon to remove compounds that are refractory to water clarification. Thanks to powdered activated carbon, it ensures the production of high-quality drinking. Adsorption - Extraction ](/technologies/actiflo-carb) Resources [PDF ACTIFLO® Carb Datasheet (1.87 MB) ](/sites/g/files/dvc3496/files/document/2018/12/3319%2CDatasheet_ActifloCarb_EN_0915.pdf) [PDF Actiflo® Pack ACP2 - High Performance Packaged Clarifiers (2.46 MB) ](/sites/g/files/dvc3496/files/document/2021/04/VWT_SOLYS_Brochure_Actiflo_EN_LR%20%281%29.pdf) [PDF Actiflo® Pack ACP 2 - The Ultimate Microsand enhanced clarifier (world, except North America) (5.89 MB) ](/sites/g/files/dvc3496/files/document/2024/10/DS-%20ACTIFLO%C2%AE%20Pack%20ACP2%20Datasheet-%20EN.pdf) [PDF Actiflo® Pack Mini - Datasheet (2.78 MB) ](/sites/g/files/dvc3496/files/document/2024/10/DS-%20Actiflo%C2%AE%20Pack%20Mini%20Datasheet-%20EN.pdf) ## Contact The principle of ballasted clarification has been known and used since the 1960s. The latest generation of high-speed clarifier based on this process is the Actiflo which combines the advantages of ballasted floc with those of lamellar decantation. The technology has become an essential tool in clarification with an inert chemical element that still offers continuous sludge discharge, safety and adaptability to incoming load variations. ![Philippe Sauvignet picture](/sites/g/files/dvc3496/files/styles/default/public/image/2022/05/Capture%20d%E2%80%99e%CC%81cran%202022-05-10%20a%CC%80%2014.39.56.png.webp?itok=EaJpnME4) ### Philippe Sauvignet Industrialization Manager **Contact Philippe through** [**his LinkedIn account**]() ## FAQ about Actiflo® ### How does clarification in water treatment using microsand work? Microsand-enhanced ballasted flocculation works by attaching fine sand particles to flocs through a polymer bridge. This increases the flocs' weight and improves settling speed while accelerating the reaction time. The result is efficient solid removal of over 90% within a 15-minute process window. ### What are the benefits of microsand-enhanced clarification? Actiflo delivers reliable, high-quality clarified water even under variable influent conditions. Its resilience to turbidity spikes and seasonal changes makes it ideal for treatment facilities requiring operational stability. ### What is ballasted flocculation? Ballasted flocculation is a fast-settling separation process used in treating drinking water, stormwater, and wastewater. It incorporates a ballasting agent (microsand) and polymers to enhance floc formation and improve sedimentation. ### How does Actiflo contribute to sustainable wastewater management? Actiflo supports sustainable wastewater management by enabling high-efficiency treatment in a compact water system. Its rapid processing and low chemical usage reduce resource consumption and operational costs. With the ability to treat complex industrial and municipal wastewaters for reuse, Actiflo promotes circular water strategies and environmental stewardship. ## Case Studies ![](/sites/g/files/dvc3496/files/styles/show_case_card/public/image/2018/12/ActifloLaunderFlowretouche.jpg.webp?itok=mV_miknJ) Calgary, Canada Randy Reaman - Municipal With an increased water demand due to population growth, coupled with the existing plant facing more stringent requirements and nearing its capacity, the City of Red Deer was planning a costly plant expansion. An additional clarifier and UV disinfection system was proposed to be installed in an expansion to the existing facility. An alternative solution was desperately needed. Actiflo was tested and selected due to its small footprint and performance at removing organic carbon. This was the only process that allowed a complete retrofit inside one of two existing contact clarifiers, while increasing the plant capacity by 80% (120,000 m3/d). And so a costly plant expansion was avoided. Since this date, Actiflo has also successfully managed storm events and flooding where Red River's flow rate went from a normal 150 cubic metre per second (cu.m/s) to 18,000 cu.m/s. These record turbidites were caused by river banks being literally washed away. However, Red Deer's drinking water quality remained unaffected. ![](/sites/g/files/dvc3496/files/styles/show_case_card/public/image/2018/12/Actiflo-Softening.jpg.webp?itok=8Q6jH_Sj) United States Coal Yard - Power The client needed to manage stormwater runoff from a 37-acre coal storage yard utilized as a part of daily operations at an industrial site in Southwestern Pennsylvania following new NPDES permit discharge limitations for total suspended solids, iron and manganese. Actiflo provided the solution by utilizing sand-ballasted to treat water with changing flow rates within a small footprint, typically less than 10% of the area required for conventional settling technology. We combined the high-rate settling process with pH adjustment and chemical pretreatment to precipitate the metals of concern and produce an effluent of consistent, compliant quality. ## Technologies related to Actiflo [ ![](/sites/g/files/dvc3496/files/styles/vwt_product_content_push/public/image/2019/03/Dusenflo-push.jpg.webp?itok=rN-3oPPw) ### Dusenflo™ Gravity Filter Since 1948, Veolia Water Technologies Canada has developed an expertise second to none in water and wastewater treatment. Among the numerous processes that the company offers to meet various treatment objectives, the Dusenflo™ gravity filter has proven to be an efficient and reliable filtration system. Filtration ](/technologies/dusenflo-gravity-filter) [ ![](/sites/g/files/dvc3496/files/styles/vwt_product_content_push/public/image/2019/01/688x250%2C2130%2CMultiflo-banner.jpeg.webp?itok=hkoT64U3) ### MULTIFLO™ Proven and adaptable sludge-clarifier technology for municipal and industrial use. Adsorption - Extraction ](/products/multiflo)