Treatment Technologies
Coagulation & Flocculation Companies
Coag/floc solution providers, chemistry, jar testing, clarifier and DAF design for particulate and colloid removal.
This page is a good fit if you need:
- Coagulation/Flocculation or Ion Exchange capabilities
- Suppliers with utilities sector experience
- Providers operating in Netherlands or China
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80 results from 80 matched providers
AKKIM KIMYA AS, AKUALYS ULTRAFILTRATION MEMBRANES
Akkim Kimya is a leading Turkish chemical company specializing in ultrafiltration membranes and water chemicals. With a strong focus on sustainability, Akkim serves diverse industries including manufacturing, utilities, and waste management across Europe, MEA, and APAC regions.
ColorKiM
ColorKiM specializes in innovative chemical solutions, focusing on polymer emulsions and textile specialty chemicals. Their environmentally friendly products support various industries, offering ecological benefits and advanced analytical testing tools to enhance efficiency and sustainability.
Industria Gratt Europa, Lda.
Gratt Indústria e Tecnologia Ambiental specializes in providing engineering and environmental technology solutions across Europe and Latin America. They focus on treatment solutions, water reuse, and infrastructure systems, catering to utilities and energy sectors.
Shanghai Ang Ran Industry Co., Ltd.
Shanghai Ang Ran Industry Co., Ltd. is a prominent water treatment equipment manufacturer and technology provider based in China, serving the Asia-Pacific region. The company specializes in delivering advanced solutions for manufacturing and utility sectors, focusing on treatment solutions and infrastructure systems.
Xiamen U Water System Co., Ltd.
Xiamen U Water System Co., Ltd. is a medium-sized company based in China, specializing in manufacturing and integrating water treatment equipment and systems. Serving the manufacturing and utilities industries, they focus on providing comprehensive treatment solutions and infrastructure development across the Asia-Pacific region.
Abalco®
Abalco® specializes in chemical and technical cleaning, renovation and conservation of heating, air-conditioning and cooling installations. Our specialists mainly focus on the technical management, preventive and corrective maintenance of installations. You can also contact us for water treatment and legionella management of evaporative condensers and cooling towers. Our SR-CT water treatment method based on electrolysis
Aqana BV
AQANA BV provides their customers and partners all over the world, with the next generation high-rate anaerobic wastewater treatment technology. Based on the immobilized anaerobic biomass inside a floating carrier the DACS technology – or anaerobic MBBR – can treat most types of industrial effluents in a very cost-effective way.
Aqua-Aero WaterSystems BV
Aqua-Aero WaterSystems BV (AAWS) has been focusing on the development and marketing of innovative, smart, and groundbreaking solutions for water and energy challenges since its establishment in 2002. After winning the World Bank Development Award for small-scale water solutions in Washington in 2006, numerous projects were carried out in Africa, India, and Southeast Asia.
Aquaservice AS
Aquaservice AS, based in Norway, specializes in advanced water filtration and treatment solutions. With expertise in UV systems and membrane technologies, they cater to utilities and manufacturing industries, providing reliable equipment and innovative technologies for effective water management.
Barchemicals
Barchemicals, based in Italy, specializes in manufacturing chemicals and technologies for water treatment. The company provides biosafety solutions, laboratory testing, and consulting services, serving industries like manufacturing, utilities, and waste management across Europe.
Bluecon
Bluecon developed the next generation decentralized wastewater treatment units based on an innovative physical process without the use of bacteria. This robust and easy to operate treatment plant converts municipal wastewater into reusable water such as irrigation water or clean water to reuse in households.
Carbonitalia S.r.l.
Carbonitalia S.r.l. specializes in providing advanced filtration materials and solutions, focusing on air depuration, water treatment, and decolorization processes for various industries. With a commitment to sustainability, they serve the European market from their base in Italy.
Ecoomix Solutions, S.L.
Ecoomix Solutions, S.L. specializes in providing high-quality chemical products and filtration materials for pool maintenance. As a trusted partner in the B2B sector, they focus on sustainable solutions and efficient logistics to ensure superior water treatment and hygiene standards.
Medica Water Division
Medica Water Division specializes in ultra-pure water systems and membrane technologies, providing advanced solutions for industries requiring high-quality water treatment. Based in Italy, they serve the European market with a focus on pharmaceuticals and healthcare sectors.
OnnWater
OnnWater, an Italian leader in water dispensing technology, specializes in advanced cooling and filtration systems. Their patented solutions, including the Tyfon® system, ensure superior bacterial elimination, making them ideal for domestic, office, and Horeca environments.
POLIFIL SRL
The company manufactures: -POLYPHOSPHATES CRYSTAL -WHITE, GREEN, BLUE --- BIG / FINE SIZE ?-POLYPHOSPHATES POWDER used in potable water ? -SILICO POLYPHOSPHATES blue certificate food grade UNI EN 1208:2005 ? -POLYPROPYLENE YARN FOR WATER TREATMENT certificate food grade used in potable water. Our company is structured with personal experience in the sector, and we are able to satisfy all your request.
SC Highberg Solution SRL
SC Highberg Solution SRL specializes in providing safe and durable industrial tanks, catering to the manufacturing and construction industries in Europe. As a small engineering and design firm, they focus on infrastructure and systems, ensuring quality and reliability in their products.
SEONE CO LTD.,
SEONE CO LTD. specializes in enhancing lifestyles with its advanced cold and hot water dispensers and purifiers. Based in South Korea, SEONE is committed to providing clean and safe water solutions, focusing on quality and innovation to meet the needs of modern consumers across the Asia-Pacific region.
Silitex S.r.l.
Silitex S.r.l. specializes in high emulsion technology, providing advanced chemical solutions for various industries including textiles, leather, and water purification. Based in Italy, the company is a key player in the European market, offering innovative products and technologies to enhance industrial processes.
Zhejiang Morejoy Water Purification Technology Co., Ltd.
Zhejiang Morejoy Water Purification Technology Co., Ltd. specializes in manufacturing advanced water purification equipment and providing cutting-edge technology solutions for efficient water treatment processes across various industries in China and the Asia-Pacific region.
Optimizing Coagulation and Flocculation for Clarification and Filtration Performance
Coagulation and flocculation are the foundational steps in most surface water treatment trains, converting colloidal and fine suspended particles into settleable or filterable floc. Coagulation—the charge neutralization step—must occur under intense rapid mixing conditions (G values of 700–1,000 s⁻¹) for 30–60 seconds to allow the coagulant (typically aluminum or ferric salts, or polyaluminum chloride) to contact all colloidal particles before the reaction equilibrium shifts. Under-mixing produces insufficient charge neutralization; over-mixing can break nascent floc before it grows to settleable size. Coagulant dose and pH must be optimized together—aluminum coagulation operates in a narrow pH window of 6.0–7.5, while ferric coagulation is effective over a wider range of 5.0–8.0.
Flocculation—the particle agglomeration step—follows coagulation in a series of tapered-energy mixing zones (G values typically declining from 60 to 20 s⁻¹ across 20–30 minutes of detention time) designed to allow micro-floc particles to collide and bind into larger, faster-settling macrofloc. Polymer coagulant aids and flocculant aids (high-molecular-weight anionic or cationic polyacrylamides) are dosed in the flocculation stage to strengthen floc and improve settling velocity. Jar testing is essential for optimizing both coagulant dose and polymer type and dose under current feedwater conditions, as seasonal NOM character changes significantly affect optimal treatment conditions.
Inline coagulation—applying coagulant with minimal detention time directly upstream of a membrane filter—is a different design paradigm used for ultrafiltration pre-treatment in surface water plants. Here the goal is not to form large settleable floc but to destabilize colloids and NOM just enough to improve membrane adsorption and reduce irreversible fouling, with the membrane itself performing the separation. Inline coagulation doses are typically much lower than conventional coagulation doses, and overdosing can accelerate membrane fouling rather than preventing it.
Frequently Asked Questions
How do I determine the optimal coagulant dose for my water treatment plant?
Jar testing is the standard method for coagulant dose optimization. Run a coagulant dose-response curve (typically 4–6 dose increments) at your current feedwater turbidity, NOM concentration (measured as UV₂₅₄ absorbance or TOC), and temperature. Measure settled turbidity, final pH, and residual aluminum or iron at each dose. The optimal dose is the lowest dose that achieves your target effluent turbidity while keeping residual coagulant within regulatory limits. Jar testing should be repeated seasonally as NOM character and temperature change, and whenever source water quality shifts significantly.
What is enhanced coagulation and when is it required?
Enhanced coagulation is a treatment strategy that optimizes coagulant dose and pH to maximize total organic carbon (TOC) removal beyond what is needed just for turbidity reduction, targeting specific percent TOC removal requirements under EPA's Surface Water Treatment Rule and Disinfectants and Disinfection Byproducts Rule (D/DBPR). It is required for surface water utilities in TOC removal percentage tiers defined by source water TOC and alkalinity. Enhanced coagulation typically requires operating at a lower pH (5.5–6.0 for alum) and higher coagulant dose than conventional turbidity-removal coagulation.
How do I select between aluminum sulfate (alum), ferric chloride, and polyaluminum chloride (PAC)?
Alum is the lowest-cost option and performs well in warm water (above 10°C) at moderate NOM concentrations and in the pH range of 6.0–7.5. Ferric chloride is preferred for cold water performance, higher NOM concentrations, and source waters requiring lower residual pH operation. PAC (polyaluminum chloride) typically outperforms both at lower temperatures, produces less sludge per unit of TOC removal, and works over a wider pH range, but costs 2–4 times more per kg than alum. Pilot testing or jar testing under your specific conditions is the only reliable way to compare performance for your feedwater.
What are the signs that my coagulation/flocculation process is underperforming?
Common indicators include filter effluent turbidity above 0.3 NTU on a consistent basis (suggesting poor floc formation and filter breakthrough), high filter head loss development rate (suggesting large, weak floc is blinding the filter surface rather than penetrating the bed), visible pinpoint floc in the settled effluent (indicating incomplete flocculation), and increasing filter-to-waste (FTW) volumes needed at startup (suggesting coagulation optimization is needed). Increasing disinfection byproduct formation in the finished water is a secondary indicator of inadequate NOM removal during coagulation.