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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Showing 61-80 of 80
80 results from 80 matched providers
Paques
Paques is a global leader in the development and construction of biological water and gas purification systems. Paques specializes in anaerobic and aerobic purification technologies for industrial applications.
Anodamine Europe BV
Anodamine Europe BV provides an innovative water treatment chemistry which is applicable on water-steam cycles and cooling systems. Primary application of our technology is power stations but essentially all water systems can be treated with our technology. We supply the only product which is non-toxic, OEM-compliant with a proven track-record.
Aqua Purification Systems
Wholesale Export Distributors for Water Treatment
BWT Nederland
BWT stands for Best Water Technology and is the leading water technology group in Europe. BWT develops and produces innovative technologies for water treatment for the pharmaceutical industry, process industry, households, and the beverage industry.
Changzhou Boyuan Plastic Co., Ltd.
Changzhou Boyuan Plastic Co., Ltd. is a medium-sized equipment manufacturer based in China, specializing in the production of plastic components for various industrial applications. The company is focused on serving the manufacturing industry, leveraging its expertise in plastic production to deliver high-quality products.
Colubris Cleantech
Colubris Cleantech supplies high-quality water treatment plants and customized solutions for the industrial market. This includes membrane filtration (MBR, UF, NF, RO), flotation, DAF, and water treatment chemistry. Colubris provides process water, purifies wastewater, and reclaims water.
ECOSOFT
Manufacturer of Water Treatment Equipment
Frisia Zout
Frisia Zout produces high-quality salt from underground salt layers. Through solution mining, the salt is extracted and processed into various salt products for the food, chemical, and water treatment industries.
Iwaki America Inc.
Iwaki America Inc. delivers reliable and innovative solutions in water treatment, specializing in manufacturing equipment and providing technology for industrial water management and purification. Serving North America, they cater to manufacturing, utilities, and waste management industries.
Logisticon
Logisticon is leverancier van mobiele waterbehandelingsinstallaties en spoedservice. Logisticon biedt verhuur, verkoop en onderhoud van pompen, filters, ionenwisselaars en omgekeerde osmose-installaties.
SERVYECO
Servyeco specializes in comprehensive water management solutions, offering a range of chemical products for wastewater, potable, and process water treatment. With expertise in plant operations and innovative technologies, they serve industrial and public sectors across Europe.
Wanhua Chemical Group Co., Ltd.
Wanhua Chemical Group Co., Ltd. is a leading chemical supplier in China, known for its extensive range of chemical products and solutions. As a large-scale enterprise, it serves various industries with a focus on innovation and quality in the chemical and pharmaceuticals sector.
Zaoqiang Yaxin Environmental Protection Technology Co., Ltd.
Zaoqiang Yaxin Environmental Protection Technology Co., Ltd. is a China-based company specializing in the manufacturing and provision of water treatment equipment and technologies, serving industries focused on waste management and utilities.
ATB Nederland
Your partner in process techniques and water- and sludge treatment. From single process components to complete industrial water and sludge treatment installations. Voted as most sustainable business in the province of Drenthe.
Brightwork
Brightwork is a flexible and agile consulting and engineering firm that possesses all the necessary expertise for water and infrastructure-related projects. Brightwork aims to make a positive contribution to a livable world by finding integrated solutions to complex challenges.
Equans
Equans is the new name for ENGIE's technical services. Equans provides technical solutions for buildings, industry, and infrastructure, including water treatment, installations, and maintenance.
Procede Group
Procede Group is an engineering firm specializing in process optimization and modeling. Procede provides consulting, engineering, and software for the chemical industry and water treatment.
Tidal Clear
Tidal Vision specializes in advanced chitosan solutions, offering powerful and sustainable chemistry for water treatment and pollution challenges. Their innovative biomolecular technologies provide superior performance and economic benefits for critical industries.
PWNT
PWNT, part of the Nijhuis Saur Industries (NSI) group, delivers cutting-edge solutions and consultancy services to meet the diverse needs of water utilities worldwide. Building on PWN’s rich legacy, PWNT leverages over 100 years of expertise to drive innovation in water treatment, with a strong focus on drinking water. Our pioneering technologies, including SIX® (Suspended Ion Exchange), ILCA® (Inline Coagulation and Adsorption), and CeraMac® (Ceramic Membrane Microfiltration), offer efficient, sustainable, and cost-effective treatment solutions for various water sources, ensuring the delivery of high-quality drinking water. Beyond technology development, PWNT offers comprehensive consultancy services in the study, design, optimization, and integration of water treatment technologies. PWNT is well-equipped to provide expert guidance on both emerging and traditional processes, such as pellet softening, advanced oxidation, GAC filtration, and coagulation. With a strong global presence, PWNT has successfully implemented large-scale projects and pilot installations across the world. Our innovative technologies are trusted by water utilities for their ability to address complex water quality challenges and adapt to diverse environmental conditions. Headquartered in the Netherlands, PWNT continues to foster strong partnerships with leading universities and global companies, committed to advancing sustainable water treatment technologies and helping utilities achieve their water quality goals.
EC Solutions
EC Solutions is a specialized consultancy focused on electrochemical technologies for water and wastewater treatment. We believe electrochemical processes, and electrocoagulation in particular, are among the most promising technologies in the water sector today. As a rule of thumb, anything that can be treated with conventional coagulation–flocculation can be pretreated with electrocoagulation, without adding chemicals. That means less chemical handling, lower sludge complexity, and more controllable treatment outcomes. We help industries evaluate, pilot, and implement electrocoagulation as a robust pretreatment or core process for color removal, heavy metals, TSS, emulsified oils, and complex industrial effluents. If you’re dealing with a difficult water challenge and want a cleaner, smarter alternative to chemical treatment, EC Solutions is built for that.
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.