China Suppliers of Composite Polyaluminum Chloride (CPAC) - Advanced Water Treatment Flocculant from Factory

Composite Polyaluminum Chloride (CPAC) is an advanced multifunctional water treatment solution developed by combining various functional substances, including aluminum salts, iron salts, and organic flocculants, with Polyaluminum Chloride (PAC). By leveraging the synergy effect of its diverse components, CPAC effectively overcomes the limitations of traditional PAC, such as its reduced efficacy in low-turbidity wastewater and its inability to simultaneously decolorize and remove heavy metals. This innovative approach enables CPAC to achieve superior flocculation and multifunctional purification of water.
While traditional PAC primarily relies on electrical neutralization + adsorption bridging, CPAC is designed to tackle a wide range of pollution issues, including suspended solids, colloids, organic matter, and heavy metals in complex water environments. By integrating additional components like iron salts that enhance net capture ability, CPAC represents the next generation of flocculants for water treatment. As a leading supplier and factory in China, we are committed to providing high-quality CPAC solutions tailored to meet your water treatment needs.

Product Description

Core Features

1. Multi-effect synergy to address the "shortcomings" of single PAC

Complete the pH adaptation range: The optimal pH for single PAC is 6–9, while CPAC can extend the applicable pH to 4–11 by adding iron salts (such as polyferric sulfate) or organic bases (such as polyacrylamide), adapting to highly acidic (such as mine wastewater) or highly alkaline (such as papermaking black liquor) scenarios.
Enhanced Decolorization / Heavy Metal Removal: For printing and dyeing wastewater (containing dye pigments) or electroplating wastewater (containing Cr⁶⁺, Cu²⁺), CPAC can be compounded with activated carbon (adsorbing pigments) or sulfides (complexing heavy metals), with a high heavy metal removal rate.
Reduce sludge production: Composite components (such as diatomite) can enhance the compactness of flocs, with the sludge volume reduced by 20%–30% compared to single PAC, thereby reducing the subsequent pressure filtration cost.
Compound Poly Aluminium Chloride

2. Adapt to complex water quality, covering over 90% of industrial scenarios

Through "Modularization compounding" design, CPAC can flexibly adjust the formula according to different wastewater characteristics, for example:
High turbidity wastewater (such as coal washing and mining wastewater): Compound high polymerization degree PAC (Al₂O₃ ≥ 15%) + diatomite (enhanced filtration), turbidity removal rate ≥ 98%.
High organic wastewater (such as printing and dyeing, food processing wastewater): Compound activated carbon (adsorbing COD) + polyacrylamide (coagulant aid), with a COD removal rate ≥ 50%.
Heavy metal-containing wastewater (such as electroplating and chemical wastewater): compounded sodium sulfide (complexing heavy metals) + iron salt (netting and precipitation).
Compound Poly Aluminium Chloride
Applicable Scenarios
🏢 Advanced Treatment of Municipal Sewage
🌅 Decolorization and COD Reduction of Printing and Dyeing Wastewater
Removal of Heavy Metals from Electroplating Wastewater
Recycling of Papermaking / Mining Wastewater
Application of PAC
Water treatment process
Industrial water treatment
Flocculation process
Wastewater purification
Precautions for Use
⚠️ Water Quality Testing First
Before use, it is necessary to test the pH, COD, and heavy metal content of wastewater, and adjust the CPAC formula based on the data (for example, acidic wastewater requires an increase in the proportion of iron salts).
📋 Storage Conditions
Liquid type should be stored sealed in a cool place (temperature ≤ 30°C); solid type should be stacked to prevent moisture (humidity ≤ 60%); the shelf life of the liquid type is 12 months.
Frequently Asked Questions
Q What is Compound Poly Aluminium Chloride (CPAC) and how does it differ from standard PAC?
A CPAC is an enhanced coagulant formulated by combining standard PAC with complementary additives such as iron salts, activated carbon, or polyacrylamide. Unlike single PAC, which performs optimally within a pH range of 6–9, CPAC extends effective treatment to pH 4–11 and simultaneously targets turbidity, color, COD, and heavy metals in a single dosing step.
Q What types of industrial wastewater is CPAC most suitable for?
A CPAC is well-suited for a wide range of industrial effluents including printing and dyeing wastewater, electroplating wastewater, coal washing and mining wastewater, food processing effluent, papermaking black liquor, and municipal sewage. Its modular compounding design allows the formula to be customized for each specific water quality challenge.
Q How effective is CPAC at removing heavy metals such as Cr⁶⁺ and Cu²⁺?
A When CPAC is compounded with sulfides (for complexing heavy metals) and iron salts (for netting and precipitation), it achieves a high heavy metal removal rate. The combined mechanism of complexation, adsorption, and floc entrapment makes it significantly more effective than standard PAC alone for electroplating and chemical wastewater treatment.
Q Does CPAC reduce sludge generation compared to conventional coagulants?
A Yes. Composite components such as diatomite enhance the structural compactness of flocs formed during treatment. As a result, sludge volume is reduced by approximately 20%–30% compared to single PAC treatment, which directly lowers downstream pressure filtration costs and simplifies sludge handling.
Q What should be done before applying CPAC to a new wastewater source?
A A thorough water quality analysis should be conducted before application, measuring parameters such as pH, COD, suspended solids, and heavy metal concentrations. The CPAC formula is then adjusted based on these results — for instance, acidic wastewater may require a higher proportion of iron salts to optimize performance.
Q What are the correct storage conditions and shelf life for CPAC products?
A Liquid CPAC should be stored in a sealed container in a cool environment with a temperature not exceeding 30°C, and has a shelf life of 12 months. Solid CPAC should be stored in dry conditions with relative humidity not exceeding 60% to prevent moisture absorption and caking, which could affect dosing accuracy and treatment performance.

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