The selection of coagulants is a cornerstone of effective water treatment. For decades, Aluminum Sulfate (alum) has been a go-to chemical. However, advancements in polymer chemistry have led to the development of superior alternatives, with Polyaluminium Chloride (PAC) often taking the lead. As a prominent manufacturer and supplier, we frequently address questions about why PAC is increasingly preferred over alum.

Aluminum Sulfate has a long history of use in clarifying water by forming aluminum hydroxide precipitates that trap impurities. However, this process comes with several drawbacks. Alum requires a relatively wide pH range to be effective and often leaves behind significant amounts of residual aluminum in the treated water. This necessitates careful pH adjustment and can contribute to sludge accumulation, leading to higher disposal costs and operational complexities. The large quantities of sludge generated also present environmental and logistical challenges.

Polyaluminium Chloride, on the other hand, offers a more advanced approach. As an inorganic polymer coagulant, PAC possesses a higher positive charge density and more complex polymerized structures. This means it can neutralize a broader range of suspended particles and organic matter with greater efficiency. Key advantages of PAC include:

1. Lower Dosage Requirements: PAC typically requires significantly less product to achieve the same or better treatment results compared to alum. This reduces chemical costs and handling.

2. Faster Floc Formation and Settling: PAC forms larger, denser flocs that settle more rapidly. This improves the efficiency of sedimentation tanks and can increase the throughput of a treatment plant.

3. Reduced Sludge Production: The higher efficiency and lower residual aluminum from PAC result in less sludge, lowering disposal costs and environmental impact.

4. Wider pH and Temperature Efficacy: PAC performs effectively across a broader range of pH and temperature conditions, offering greater flexibility in various environments, especially in cold climates where alum can be less effective.

5. Lower Residual Aluminum: The minimized residual aluminum in treated water is a critical factor for drinking water applications, enhancing safety and reducing the need for further purification steps.

When you are looking to buy PAC, consider its superior performance metrics and potential for cost savings. As a leading manufacturer in China, we are committed to providing high-quality PAC that consistently outperforms traditional coagulants. We invite you to contact us for a quote and to discuss how our PAC can optimize your water treatment operations. Make the switch to PAC for a more efficient, cost-effective, and environmentally friendly solution.