Understanding the molecular dynamics, bubble-rupture interfaces, and application principles of advanced industrial defoamers.
Foam in wastewater treatment is not just an aesthetic issue; it is a complex physical-chemical phenomenon that severely degrades plant operating efficiency. Whether generated through mechanical agitation, high surfactant concentrations, or biological activities (such as filamentous bacterial blooms in activated sludge processes), foam acts as a thermal and gas barrier, reduces oxygen transfer efficiency, and risks overflowing biological basins. Effective foam control requires chemical agents that target the microphysical structure of the bubble film.
Wastewater defoamers operate on the principle of spreading coefficient and penetration dynamics. To collapse foam, the defoaming agent must have a lower surface tension than the foaming liquid. Upon contact, the defoamer droplets displace the surfactant molecules stabilizing the air-water interface. The defoamer enters the film (lamella) between the bubbles and spreads rapidly, causing localized thinning. Since the defoamer lacks the cohesive strength of the surfactant-laden film, the liquid film collapses, leading to immediate bubble rupture.
| Defoamer Type | Core Chemistry | Key Application Zones | Main Advantages | Temperature/pH Range |
|---|---|---|---|---|
| Organic Silicone | Polydimethylsiloxane (PDMS) & silica derivatives | Biological aeration, chemical processing, high-shear areas | Extremely low surface tension, rapid knockdown, low dosage | pH 2 - 12, Temp up to 90°C |
| Polyether Copolymers | EO/PO block polyethers | Industrial membrane bioreactors (MBR), high-salinity water | Zero membrane fouling, excellent stability under shear | pH 4 - 10, Temp up to 65°C |
| Mineral Oil | Paraffinic hydrocarbon oils & waxes | Paper mills, municipal primary clarification, construction runoff | Highly cost-effective, persistent defoaming effect | pH 5 - 9, Temp up to 50°C |
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.
Through persistent dedication, we have established our place as a leading manufacturer in the high-end environmental chemistry segment in China, optimizing water treatment dynamics for hundreds of industrial ecosystems.
Extensive infrastructural footprint and operations servicing major ecological projects across East Asia and global trade networks.
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.
Tailoring chemical solutions to diverse industrial environments and municipal wastewater conditions.
Controls biological foam arising from microthrix parvicella or nocardioform filamentous bacteria without affecting microbiological aeration processes.
Stands up to extreme pH levels, high saline densities, and aggressive volatile organic compounds (VOCs) characteristic of coal gasification plants.
Features excellent high-temperature dispersion. Resists acid/alkali degradation in hot dyeing baths with complex surfactant formulations.
Specially engineered block polyethers prevent gel layers on PVDF/PES membranes, maintaining high flux rates and long filter lifespans.
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.
Additionally, we have established an expert workstation with the Tsinghua University Association of Senior Scientists and Technicians, and have set up joint R&D laboratories with Shandong University and Beijing University of Technology. We also serve as a commercialization partner for the industry-academia-research achievements of institutions such as Peking University and Tianjin University.
Leveraging vertical raw material access and geographic infrastructure to assure stable global chemical distribution.
In the global chemical marketplace, supply chain reliability is just as critical as product performance. Operating from China’s highly integrated chemical industrial parks, Smedic benefits from direct proximity to key raw materials, including bulk silicones, organic polyether polyols, and mineral bases. This vertical regional integration insulates our clients from pricing shocks and guarantees production continuity, even during volatile market conditions.
Furthermore, our regional logistics bases in Shandong, Shanxi, Anhui, Guangxi, and Sichuan act as supply buffers. This distribution network enables us to dispatch bulk orders rapidly via major maritime gateways (Tianjin, Qingdao, and Shanghai ports). Combined with automated packaging lines and robust storage capacity exceeding hundreds of thousands of tons, we ensure that both OEM and ODM orders reach international clients with minimized lead times.
Direct supply agreements with primary chemical refineries ensure uncompromised pricing stability and ingredient purity.
Advanced packaging systems handle 25kg, 200kg, and 1000kg IBC totes without contamination risks.
Tailored labeling and heavy-duty shipping crates compliant with international maritime and air cargo regulations.
Our independently developed patented technologies, 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", effectively filling domestic gaps 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 Ministry of Housing and Urban-Rural Development. Additionally, our independently developed "Inorganic-Organic Covalent Bond Flocculant and Its Advanced Water Purification Technology" won the 22nd China Patent Award, the First Prize for Technological Invention from the China Petrochemical Industry Association, and the Hebei Province Science and Technology Progress Award.
Smedic has 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 are proud partners of major environmental groups, including Shouchuang, Beijing Enterprises Water, Yangtze River Ecological Group, OriginWater, and China Water Environment Group.
Smedic has been granted over sixty Chinese patents, including more than forty invention patents and over twenty utility model patents, leading national standardizations.
Driving the evolution of water purification through biodegradable chemistry and zero-impact formulations.
The industrial defoamer market is shifting toward sustainable, bio-degradable chemistry. While traditional silicone and polyether formulas deliver outstanding results, modern environmental compliance calls for minimized chemical footprints. Smedic’s R&D roadmap focuses on:
Over a decade of scientific breakthroughs and industrial capacity expansions.
Our production bases maintain advanced laboratory infrastructure and verify materials in accordance with strict international guidelines.
Professional technical responses to common concerns regarding industrial foam management and international supply logistics.
Biological foam is typically caused by filamentous bacteria (e.g., Microthrix parvicella) producing hydrophobic extracellular polymeric substances (EPS) that trap air bubbles generated during aeration. Smedic's organic silicone defoamers lower the surface tension of the EPS fluid, collapsing the foam structure without harming biological cultures.
Yes. Standard silicone-based defoamers can cause membrane fouling by forming gel-like silica deposits on PVDF/PES membranes. To prevent this, we design specialty polyether defoamers that disperse fully in water, leaving zero deposits on membrane pores and preserving critical flux rates.
Our silicone defoamers are modified with emulsifying agents to ensure structural integrity across a wide pH range (2 to 12) and temperatures up to 90°C. They do not hydrolyze or separate into layers, maintaining consistent performance in demanding industrial chemical processes.
We offer flexible packaging configurations for sea, rail, and land transport. This includes 25kg plastic drums, 200kg steel/plastic drums, and 1000kg IBC totes. Custom branding, OEM labeling, and export-compliant palletization are available upon request.
Our defoamers are highly effective at low dosages (often between 10 to 100 ppm), meaning they introduce negligible organic loads. The impact on final Chemical Oxygen Demand (COD) and Biochemical Oxygen Demand (BOD) is minimal, assisting plants in meeting strict discharge standards.
We maintain ISO 9001 (Quality Management), ISO 14001 (Environmental Management), and ISO 45001 (Occupational Health) certifications. Our export products comply with EU REACH registration guidelines, SGS purity analyses, and international environmental standards.
Smedic Tech
