Engineered for precise flocculation and contaminant removal in municipal drinking water and critical industrial streams.
Polyaluminum Chloride (PAC) stands as the cornerstone of contemporary municipal coagulation processes, replacing traditional alum due to its superior efficacy, rapid floc formation, and broader pH operating window. Drinking Water Grade Polyaluminum Chloride (often distinguished by an Al2O3 content ≥ 30% and extremely low heavy metal concentrations) is chemically tailored to satisfy stringent global public health regulations. The synthesis of this coagulant involves advanced spray-drying techniques, resulting in a highly stable, white-to-light-yellow powder that dissolves rapidly to release highly charged polynuclear aluminum complexes.
Unlike industrial grades, drinking water grade PAC undergoes intense purification processes. The raw materials used, including high-purity aluminum hydroxide and synthetic hydrochloric acid, are carefully selected to minimize trace contaminants like arsenic (As), lead (Pb), cadmium (Cd), and mercury (Hg). Municipal water authorities worldwide mandate these specifications to prevent secondary pollution in treated potable water supplies.
"High-purity PAC works through a combination of charge neutralization and adsorption bridging. Its pre-polymerized structure allows it to function efficiently in cold water conditions, where traditional aluminum sulfate struggles to form settleable flocs."
As the world's leading manufacturing hub for chemical synthesis, China offers unparalleled advantages in the production and distribution of Polyaluminum Chloride. Factories located in industrial zones like Wuxi combine vertical integration of raw materials with state-of-the-art automation. This allows for unmatched consistency in batch-to-batch chemical properties.
China-based plants possess massive production capacities (exceeding 500,000 tons annually in some regions), significantly lowering manufacturing costs through bulk raw material sourcing and automated rotary kiln operations.
Our plants leverage high-speed centrifugal spray-drying towers. This method guarantees uniform particles, rapid dissolution rates, and high basicity (ranging from 50% to 85%), which are key for minimizing dosage requirements.
Adherence to national GB 15892-2020 standards and international NSF/ANSI 60 certifications ensures that heavy metal impurities are strictly limited to fractional parts per million (ppm), making the PAC safe for consumption.
Moreover, China's proximity to major maritime shipping lanes ensures a streamlined logistics network. Whether shipping liquid versions via bulk tankers or solid granules in customized 25kg or 1000kg bags, manufacturers can rapidly deploy products to ports in the Middle East, Southeast Asia, South America, and Europe.
Modern water treatment demands customized coagulant programs that adapt to varying water chemistries, seasonal turbidity, and regulatory mandates. Drinking Water Grade PAC serves as the core reactant in a variety of challenging scenarios:
Surface waters source feedstocks that experience sudden spikes in turbidity (sometimes exceeding 1000 NTU) due to soil erosion during heavy rains. Traditional coagulants require complex pH adjustments using lime or soda ash. High-purity PAC, with its pre-hydrolyzed polymeric structure, maintains flocculation efficiency without significantly depleting water alkalinity. This reduces chemical dosing complexity and limits overall sludge volume.
In reverse osmosis (RO) desalination plants, membrane fouling caused by organic matter and colloidal silica is a major operational challenge. Implementing a dual-dosing strategy with a combination of high-purity Polyaluminum Chloride and cationic polymers like PDADMAC effectively coagulates fine particulates. This ensures a clean feed stream, extending membrane life and reducing chemical wash cycles.
Wuxi BS Water Treatment Chemicals Co., Ltd. (founded in 1998) stands at the forefront of chemical innovation in China. With decades of continuous research and development, we specialize in producing premium coagulants and flocculants designed for municipal drinking water systems and demanding industrial wastewater applications.
By integrating advanced manufacturing facilities with an experienced research team, we have successfully developed a comprehensive product line. This includes high-purity Polyaluminum Chloride, Aluminum Chlorohydrate (ACH), and specialized Polyacrylamide (PAM) formulations, serving customers in over 50 countries.
We recognize that no two raw water sources are identical. Our laboratory works directly with international engineering firms and municipal operators to analyze local water chemistry. We design custom basicity and active ingredient concentrations to optimize flocculation, lower treatment costs, and ensure strict compliance with regional environmental standards.
The effectiveness of Polyaluminum Chloride in water treatment depends primarily on two properties: its Al2O3 concentration and its basicity. Basicity represents the degree of polymerization of the aluminum ions. A higher basicity means the product contains a larger proportion of highly charged, polynuclear polymeric aluminum complexes like Al13 and Al30.
These large, highly charged molecules neutralize the negative surface charges on suspended colloidal particles more effectively than simple aluminum ions. This leads to rapid destabilization, micro-floc formation, and sedimentation.
Chemical Formula Expression: [Al2(OH)nCl6-n]m (where 1 ≤ n ≤ 5, and m ≤ 10)
For municipal drinking water applications, choosing a high-basicity (80% - 85%) spray-dried PAC offers distinct advantages. It minimizes the residual aluminum concentration in the finished water, preventing compliance issues. It also reduces chemical consumption, lowers overall sludge disposal costs, and minimizes the impact on the water's pH, which reduces the need for post-treatment adjustments.
As an established industrial partner, Wuxi BS Water Treatment Chemicals Co., Ltd. provides robust OEM/ODM services backed by dedicated chemical laboratories.
Our experienced team provides technical guidance throughout the product lifecycle, from initial raw water testing and jar tests to full-scale dosing optimization.
With an annual sales volume exceeding 500,000 tons and a large-capacity finished product warehouse, we ensure consistent and secure supply chains for large-scale operations.
We supply dry powders alongside liquid formulations, and we assist clients in implementing automated feed equipment to optimize chemical usage.
The water treatment industry is shifting toward more environmentally friendly chemistry and automated dosing technologies. The key drivers shaping this space include:
From local production roots to a globally recognized supplier of advanced water treatment chemicals.
The manufacturing factory was established, focusing on primary coagulant production for local municipal facilities.
The company expanded and officially renamed as Wuxi Bisheng Water Treatment Agent Co., Ltd., upgrading its chemical synthesis reactors.
Initiated international distribution networks, exporting drinking water grade chemicals to markets in Southeast Asia and Europe.
Annual sales revenue surpassed 10 million USD, driven by growing global demand for high-purity spray-dried Polyaluminum Chloride.
Established our dedicated foreign trade department to provide direct support, logistics, and customized chemical solutions to global partners.
Our manufacturing facility operates under international quality, environmental, and safety management standards.
Expert answers to the most common questions regarding chemical properties, application methods, and global logistics.
Drinking Water Grade PAC is produced using high-purity raw materials (such as aluminum hydroxide and synthetic hydrochloric acid) to keep heavy metals (arsenic, lead, mercury) within strict regulatory limits. It has an Al2O3 content of 30% or higher and is typically white or light yellow. Industrial Grade PAC, which is often dark yellow or brown, is manufactured from bauxite and hydrochloric acid. It may contain higher levels of trace impurities and is only suitable for industrial wastewater treatment.
Basicity indicates the degree of polymerization of the aluminum complexes within the PAC. Higher basicity (ranging from 50% to 85%) means the product contains larger, more highly charged polymeric aluminum molecules. This increases the speed and efficiency of floc formation, lowers chemical consumption, minimizes residual aluminum in the treated water, and helps maintain the water's pH without requiring additional alkaline additives.
Spray-dried PAC is produced by atomizing a liquid PAC solution and drying it in a hot air chamber. This process yields fine, uniform, and highly soluble particles with low water-insoluble matter (often < 0.3%). Roller-dried PAC is dried on steam rollers and ground into flakes or granules, which can lead to larger particle variations and slightly higher insoluble content. Spray-dried PAC is preferred for drinking water facilities due to its superior purity and fast dissolution rate.
Optimal dosage varies depending on raw water parameters, such as turbidity and temperature. For typical municipal surface waters, the dosing rate for solid PAC ranges between 5 to 30 mg/L (ppm). We recommend conducting standard jar tests with the specific raw water source to establish the optimal dose, helping to prevent both under-dosing and excessive coagulant use.
Our production processes are aligned with global standards, including the Chinese GB 15892-2020 national standard, European EN 883, and NSF/ANSI 60 guidelines. We run strict quality control checks on every batch, testing for heavy metal content, basicity, and active Al2O3 concentration. Every shipment is accompanied by a Certificate of Analysis (COA) for transparency and traceablity.
Stay informed about our latest technical innovations, plant updates, and industry insights.
Sep 09, 2025
We are expanding our distribution footprints, offering localized logistics solutions and custom formulation services to municipal operators worldwide.
Aug 21, 2025
Introducing new solid feeding system integrations to help municipal utilities optimize their dry powder coagulant dosing operations.
Aug 21, 2025
Wuxi BS hosted regional discussions on minimizing carbon footprints during the manufacture of inorganic water treatment coagulants.
Need technical guidance on choosing the right coagulant? Our team is available to help with product selection, raw water analysis, and delivery options.
Tel: +86 13584221461
Email: [email protected]
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