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China Suppliers of Composite Polyaluminum Chloride (CPAC) - Advanced Multifunctional Water Treatment Factory
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.
• 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.
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).
• 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).
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
Precautions for Use
Important Notes Before & During 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%), and the shelf life of the liquid type is 12 months.
Frequently Asked Questions
What is Compound Poly Aluminium Chloride (CPAC) and how does it differ from standard PAC?
CPAC is an enhanced coagulant formulated by combining standard Poly Aluminium Chloride (PAC) with additional agents such as iron salts, activated carbon, diatomite, or polyacrylamide. Unlike single PAC — which works optimally only within a pH range of 6–9 — CPAC extends effectiveness to pH 4–11 and addresses limitations like decolorization, heavy metal removal, and sludge volume reduction.
What types of wastewater is CPAC most suitable for treating?
CPAC is suitable for a wide range of industrial wastewater including high-turbidity wastewater (coal washing, mining), high-organic wastewater (printing & dyeing, food processing), heavy metal-containing wastewater (electroplating, chemical plants), municipal sewage, and papermaking or mining recycling water — covering over 90% of common industrial scenarios.
How effective is CPAC in removing heavy metals from electroplating wastewater?
CPAC achieves a high heavy metal removal rate when treating electroplating wastewater containing Cr⁶⁺ and Cu²⁺. This is accomplished by compounding with sulfides (which complex heavy metals) and iron salts (which assist in netting and precipitation), making it a highly effective solution for industrial electroplating effluent treatment.
Does CPAC produce less sludge compared to standard PAC?
Yes. By incorporating composite components such as diatomite, CPAC enhances the compactness of flocs formed during coagulation. This results in a sludge volume reduction of 20%–30% compared to single PAC treatment, which significantly lowers downstream pressure filtration costs and simplifies sludge disposal.
What preparations are required before using CPAC in a treatment system?
Before applying CPAC, it is essential to conduct a comprehensive water quality test covering pH levels, COD concentration, and heavy metal content. The CPAC formula should then be adjusted based on the test results — for instance, acidic wastewater (low pH) typically requires an increased proportion of iron salts in the compound formulation.
What are the recommended storage conditions for CPAC products?
Liquid CPAC should be stored in a sealed container in a cool environment with temperatures not exceeding 30°C, and has a shelf life of 12 months. Solid CPAC should be stored in dry conditions with relative humidity kept at or below 60% to prevent moisture absorption and degradation of the product.