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Explore our high-performance coagulants and flocculants engineered for oil-water separation applications across diverse industrial environments.
Oil-water separation is one of the most critical challenges in modern industrial wastewater treatment. Coagulants and flocculants are specialized chemical agents that play a pivotal role in destabilizing emulsified oil droplets and suspended particles, enabling their efficient removal from water streams. Through charge neutralization, bridging, and sweep flocculation mechanisms, these agents transform difficult-to-treat oily wastewater into clean, reusable or safely dischargeable effluent.
Coagulants — such as polyferric sulfate (PFS), polyaluminum chloride (PAC), and aluminum sulfate — act by neutralizing the negative surface charges on oil droplets and colloidal particles, causing them to aggregate. Flocculants, typically high-molecular-weight polyacrylamides (PAM) or natural biopolymers, then bridge these microaggregates into larger, settleable flocs that can be removed by sedimentation, flotation, or filtration.
The synergistic application of coagulants and flocculants is now the industry standard for oil-water separation across refinery wastewater, produced water from oilfields, food-processing effluent, metal-cutting fluid recovery, and more.
Advanced Chemical Technology for
Clean Water, Cleaner Industry
Coagulation · Flocculation · Separation
The global demand for oil-water separation chemicals is experiencing robust growth, driven by tightening environmental regulations, expanding oil & gas production, and the rapid industrialization of emerging economies.
Modern coagulant-flocculant systems achieve oil removal efficiencies exceeding 99%, reducing COD and suspended solids to meet the strictest discharge standards in a single treatment stage.
Next-generation phosphate-free and biodegradable flocculants minimize secondary pollution, aligning with global green chemistry initiatives and circular economy principles.
Inorganic-organic covalent bond flocculants represent a breakthrough in molecular design, delivering superior performance across a wide pH range and varying temperature conditions.
From small-scale food processing plants to mega-refinery complexes handling millions of cubic meters per day, coagulant-flocculant dosing systems are fully scalable and automatable.
Optimized dosing protocols and high-concentration formulations reduce chemical consumption by up to 30%, significantly lowering operational costs versus conventional treatment methods.
Integrated organophosphorus corrosion and scale inhibitors protect downstream equipment, extending system lifespan and reducing unplanned maintenance downtime in oil-water treatment circuits.
The versatility of coagulant and flocculant technologies enables their deployment across a remarkably broad spectrum of industrial oil-water separation challenges.
Refineries generate highly complex oily wastewater containing emulsified crude oil, phenols, sulfides, and heavy metals. Polyferric sulfate combined with anionic PAM flocculants achieves rapid demulsification and floc formation, enabling compliance with GB 31570 discharge standards. Automated dosing systems continuously adjust chemical feed based on real-time influent quality monitoring.
Produced water from oil extraction contains dispersed oil, suspended solids, dissolved salts, and scale-forming ions. Cationic flocculants combined with inorganic coagulants effectively break oil-water emulsions stabilized by natural surfactants, while corrosion and scale inhibitors protect reinjection pipelines. This integrated approach supports water recycling rates above 95% in modern oilfield operations.
Spent metalworking fluids are among the most challenging oil-water emulsions to treat, stabilized by surfactants and extreme-pressure additives. Acid-breaking followed by cationic coagulant dosing and high-molecular-weight flocculant addition achieves separation efficiencies above 98%, enabling oil recovery and clean water reuse in closed-loop manufacturing systems.
Slaughterhouses, edible oil plants, and dairy facilities produce high-FOG (fats, oils, and greases) wastewater. Natural coagulants and bio-based flocculants are preferred for food-industry applications, providing effective oil removal while maintaining compliance with food safety regulations. Dissolved air flotation (DAF) combined with optimized coagulant-flocculant dosing achieves BOD reductions exceeding 90%.
Cooling water circuits in power plants and chemical facilities accumulate oil contamination from equipment leaks. Specialized coagulant-flocculant programs, combined with organophosphorus corrosion and scale inhibitors, maintain water quality, prevent fouling of heat exchangers, and extend cooling tower fill media lifespan — delivering measurable energy efficiency improvements.
MARPOL regulations require ships to treat bilge water to below 15 ppm oil before discharge. Compact coagulant-flocculant dosing units integrated with membrane separators provide IMO-compliant treatment in confined shipboard spaces, protecting marine ecosystems from oil pollution while enabling vessels to meet international environmental standards.
The industry is undergoing a profound technological transformation, driven by environmental imperatives, digital innovation, and advances in material science.
The shift toward plant-derived coagulants (moringa, tannin, chitosan) and biodegradable synthetic flocculants is accelerating, driven by stricter regulations on residual aluminum and acrylamide monomer levels in treated water. Bio-based products now represent the fastest-growing segment in the water treatment chemicals market, with R&D investment doubling in the past five years.
Machine learning algorithms integrated with real-time water quality sensors are enabling predictive coagulant dosing systems that automatically adjust chemical feed rates in response to influent variability. These smart systems reduce chemical overconsumption by 15–25% while maintaining consistent effluent quality — a critical advance for large-scale municipal and industrial plants.
Nanomaterial-modified flocculants incorporating magnetic nanoparticles or graphene oxide are demonstrating exceptional performance in treating highly stable nanoemulsions that resist conventional treatment. Magnetic flocculation enables rapid floc separation using external magnetic fields, eliminating the need for sedimentation tanks and dramatically reducing treatment footprint.
Coagulant-flocculant pretreatment is increasingly positioned as the first stage in ZLD systems that combine chemical treatment, membrane filtration, and evaporation/crystallization. This integrated approach enables complete water recycling in water-scarce industrial regions, with coagulant-flocculant performance directly determining the efficiency and cost of downstream membrane processes.
Covalent-bond inorganic-organic hybrid flocculants — pioneered by leading Chinese research institutions — represent a paradigm shift in molecular architecture. By covalently bonding inorganic coagulant clusters to organic polymer chains, these molecules simultaneously provide charge neutralization and bridging in a single molecule, achieving internationally advanced performance levels that have filled domestic and global product gaps.
Smedic Technology Co., Ltd. was established in 2011 as a comprehensive solution provider specialized in environmental protection agents, integrating R&D, production, sales, and engineering-related technical services. We are dedicated to providing customers with customized chemical products, technical solutions, and services.
Smedic produces environmental protection agents covering multiple sectors such as municipal sewage, industrial wastewater, and tap water treatment, as well as mineral processing agents, and oilfield chemicals. We offer more than 80 different environmental protection products, with an annual production capacity exceeding 1 million tons.
Our corporate headquarters is located in Beijing, we have multiple wholly-owned production bases in Hebei, Guizhou, Shanxi, and other regions, and have set up more than ten OEM partner factories and regional warehousing and logistics bases in Shandong, Shanxi, Anhui, Guangxi, and Sichuan provinces, among others. Our business and service network covers over 20 provinces across China. Our projects involve more than 600 urban sewage treatment plants and over 1,000 end customers in industrial wastewater treatment, mineral processing, and oilfield chemicals. The total sewage treatment capacity involved in the projects exceeds 20 million tons per day. We are a leading company in the Chinese market within the high-end segment of environmental protection chemicals for municipal and industrial wastewater treatment.
We have obtained qualifications such as National High-tech Enterprise, National Specialized, Refined, Unique and Innovative "Little Giant" Enterprise, National Key-Supported Specialized, Refined, Unique and Innovative "Little Giant" Enterprise, Hebei Province Specialized, Refined, Unique and Innovative "Little Giant" Demonstration Enterprise, Hebei Province Green Factory, Hebei Province Science and Technology-based Small and Medium-sized Enterprise, and China's Science and Technology-based Innovative Small and Medium-sized Enterprise.
We have a core technical team composed of academicians, experts, professors, and senior engineers, and have established an R&D system and a technology commercialization platform centered around one academy, three research institutes, and five bases. We have established the Hebei Provincial Enterprise Technology Center, the Hebei Provincial Advanced Water Treatment Chemicals Technology Innovation Center, and the Cangzhou Water Treatment Engineering Technology Research Center, and have been recognized as a Class A R&D institution in Hebei Province.
We have established an expert workstation with Tsinghua University Association of Senior Scientists and Technicians, and have set up joint R&D laboratories with Shandong University and Beijing University of Technology. Additionally, we also serve as a commercialization partner for the industry–academia–research achievements of institutions such as Peking University and Tianjin University.
We have been granted over sixty Chinese patents, including more than forty invention patents and over twenty utility model patents. We have led the drafting of more than ten national and industry standards, including those for composite carbon sources, composite coagulants, sodium acetate, and nitrifying and denitrifying bacterial agents.
The patented technologies and products we have independently developed, such as the bio-enhanced denitrification carbon source and the deep multi-nuclear phosphorus removal agent, have passed the scientific and technological achievement evaluation conducted by the Science and Technology Department of Hebei Province.
These achievements have been appraised as "internationally advanced" and have filled a domestic gap in this product category.
Our "Active Oxygen Compound Disinfectant" has been recognized as a National Construction Industry Scientific and Technological Achievement Promotion Project by the Science and Technology Development Promotion Center of the Ministry of Housing and Urban-Rural Development.
Our independently developed "Inorganic-Organic Covalent Bond Flocculant and Its Advanced Water Purification Technology" has won multiple awards, including the 22nd China Patent Award, the First Prize for Technological Invention from the China Petrochemical Industry Association, the Hebei Province Science and Technology Progress Award, and recognition as a Belt and Road SME Recommended Project.
We have been recognized as the "Leading Brand of Advanced Wastewater Treatment Chemicals" and the "Most Valuable Water Treatment Chemicals Brand" by China Water Network and the E20 Environmental Platform for four consecutive years.
We have established long-term strategic partnerships with dozens of major water groups, including Shouchuang Ecological and Environmental Group, Yangtze River Ecological and Environmental Group, Beijing Enterprises Water Group, OriginWater, and China Water Environment Group, and have been included in their centralized procurement supplier lists.
From coagulants and flocculants to corrosion inhibitors and heavy metal removal agents — a full spectrum of solutions for every oil-water separation challenge.
Partner with Smedic Technology — China's leading manufacturer of coagulants and flocculants for oil-water separation. Get customized chemical solutions, technical consultation, and fast global delivery backed by 14+ years of expertise.
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