Poly Aluminium Chloride (PAC) is a powerful coagulant, but its optimal performance and safety hinges on correct usage and storage practices. For procurement managers and R&D scientists tasked with water treatment operations, understanding these guidelines is essential. As a leading manufacturer and supplier of PAC, we are committed to providing clear, actionable advice to ensure you get the most out of this versatile chemical.

Proper Usage of Poly Aluminium Chloride

The application of PAC typically involves two primary methods: direct addition of the solid product or preparing a solution for application. The choice often depends on the scale of operation, equipment availability, and the specific water characteristics.

• Direct Addition: For large-scale operations or continuous processes, solid PAC can be directly introduced into the water stream. The dosage must be determined through jar tests, as it varies significantly with water quality (e.g., turbidity, pH, temperature, organic content).
• Solution Preparation: For more precise dosing or where direct addition is impractical, PAC can be dissolved in water. It's recommended to use warm water (around 40-60°C) to aid dissolution and stir continuously until fully dissolved. The prepared solution should ideally be used within 24 hours to maintain its efficacy. When you buy PAC in powder form, this preparation step is key.

Crucial Application Considerations:

• pH Control: PAC functions best within a specific pH range. For optimal coagulation, the pH of the water should be adjusted accordingly before or during PAC addition. This might involve adding alkaline substances for acidic water or acidic substances for alkaline water.
• Mixing and Stirring: Adequate mixing is vital to ensure PAC disperses thoroughly and interacts with pollutants. Gentle but sufficient agitation, typically for 1-3 minutes, helps form stable flocs.
• Dosing Sequence: When using PAC in conjunction with other treatment chemicals, such as polyelectrolytes (PAM), the order of addition is important. Generally, PAC is added first as a primary coagulant, followed by a coagulant aid.
• Water Temperature: While PAC is effective across a range of temperatures, its coagulation rate may slow down in very cold water. Adjustments to dosage or mixing may be necessary.

Safe and Effective Storage of Poly Aluminium Chloride

Proper storage is key to maintaining PAC’s quality and preventing degradation:

• Sealed and Dry Environment: PAC is hygroscopic, meaning it absorbs moisture from the air. Store it in tightly sealed containers in a cool, dry, and well-ventilated area to prevent caking and loss of effectiveness. Avoid direct contact with the ground.
• Avoid Extreme Temperatures and Sunlight: Prolonged exposure to high temperatures or direct sunlight can lead to clumping and affect product performance. Low temperatures can also cause crystallization.
• Segregation: Keep PAC away from incompatible materials, toxic substances, and chemicals that could react with it to ensure safety.
• Regular Inspection: Periodically check stored PAC for any signs of caking or degradation. If agglomeration occurs, it may require re-processing or careful handling to restore usability.

For reliable, high-quality Poly Aluminium Chloride and expert advice on its application, consider partnering with a trusted supplier. We offer competitive pricing and support for all your water treatment chemical needs. If you need to purchase PAC, contact us to learn more about our product offerings and how we can assist your operations.