01
China CPAC Suppliers - Advanced Composite Polyaluminum Chloride Factory for Multifunctional Water Treatment Solutions
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.
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:
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
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
Q
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, polyacrylamide, or diatomite. Unlike single PAC — which is effective only within a pH range of 6–9 — CPAC extends the applicable pH range to 4–11 and targets a broader range of pollutants including heavy metals, organic compounds, and high-turbidity particles.
Q
What types of wastewater is CPAC most suitable for treating?
CPAC is suitable for a wide range of industrial wastewater types, including: municipal sewage (advanced treatment), printing and dyeing wastewater (decolorization and COD reduction), electroplating wastewater (heavy metal removal such as Cr⁶⁺ and Cu²⁺), papermaking black liquor, coal washing and mining wastewater (high turbidity), and food processing wastewater (high organic load).
Q
How effective is CPAC in removing heavy metals from electroplating wastewater?
CPAC formulated with sodium sulfide (to complex heavy metals) and iron salts (to enhance netting and precipitation) achieves a high heavy metal removal rate. For wastewater containing Cr⁶⁺, Cu²⁺, and similar contaminants from electroplating processes, the compounded formula significantly outperforms standard PAC treatment alone.
Q
Can CPAC reduce sludge production compared to standard PAC?
Yes. Composite components such as diatomite enhance the compactness and density of flocs formed during coagulation. This results in a sludge volume reduction of approximately 20%–30% compared to single PAC treatment, which directly lowers pressure filtration costs and simplifies downstream sludge handling.
Q
What should be done before applying CPAC to a wastewater treatment system?
Before applying CPAC, it is essential to conduct a thorough water quality analysis — including pH, COD, and heavy metal content — of the target wastewater. Based on these results, the CPAC formula can be adjusted accordingly. For example, highly acidic wastewater may require a higher proportion of iron salts in the compound to achieve optimal coagulation performance.
Q
What are the proper storage conditions and shelf life for CPAC?
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. Proper storage ensures product stability and consistent treatment performance.