Polyaluminium Chloride (PAC) is a highly regarded inorganic polymer coagulant in the water treatment industry, known for its efficiency and ease of use. However, like any chemical, achieving optimal results and maintaining product integrity relies heavily on proper handling, usage, and storage. As a leading manufacturer and supplier of PAC in China, we are committed to providing our clients with the knowledge needed to effectively utilize our products. This guide details the correct methods for using and storing Polyaluminium Chloride.

How to Use Polyaluminium Chloride (PAC)

Effective application of PAC involves understanding its properties and the nuances of water treatment processes. The two primary methods for using PAC are:

  1. Direct Application: This method involves adding the solid PAC directly into the water source. It's a straightforward approach, especially for large volumes of water where precise dosage can be managed through robust feed systems. The key to success here is determining the correct dosage through jar tests. For instance, when treating river water, direct addition of PAC solids is a common practice.
  2. Solution Preparation: For enhanced control and often better performance, PAC can be prepared as an aqueous solution. This typically involves dissolving the PAC powder in water. It is generally recommended to use clean water, and in some cases, warming the water can aid dissolution. The concentration of the solution should be determined based on application requirements, but a common range is 5-10%. It is critical to use the prepared solution within 24 hours, as prolonged storage of the solution can lead to a decrease in efficacy. This method is often preferred for more sensitive treatment processes or when precise dosing is paramount.

Essential Precautions for PAC Usage

  • Jar Testing: Always conduct jar tests before full-scale application. Water quality can vary significantly, and jar tests help identify the optimal PAC dosage and the most effective product type for your specific needs, ensuring efficient contaminant removal and cost savings.
  • pH Adjustment: PAC's performance is highly dependent on the pH of the water being treated. Ensure the pH is within the optimal range for coagulation, typically between 5.0 and 9.0. Adjustments may be necessary using alkaline or acidic agents depending on the source water's initial pH.
  • Mixing and Stirring: Proper mixing is vital for PAC to effectively interact with and aggregate pollutants. After adding PAC, ensure adequate mixing for a specific duration (usually 1-3 minutes) to form stable flocs. This process aids in efficient sedimentation and filtration.
  • Water Temperature: While PAC is effective across a broad temperature range, performance can be slightly slower in very cold water. For optimal results, consider the water temperature and adjust application methods or dosage if necessary.
  • Dosing Sequence: When using PAC with other treatment chemicals, such as polymer flocculants, ensure the correct dosing sequence. Typically, PAC is added first, followed by other agents. Always consult product guidelines or technical support for specific combinations.

Proper Storage of Polyaluminium Chloride

The correct storage of PAC is crucial for maintaining its quality and ensuring its long-term effectiveness:

  • Environmental Conditions: Store PAC in a cool, dry, and well-ventilated area. Keep containers tightly sealed to prevent moisture absorption, which can lead to caking and reduced performance.
  • Moisture Prevention: Avoid direct contact with moisture. Store bags on pallets and protect them from humidity. Caked PAC can be difficult to dissolve and may require reprocessing or disposal.
  • Temperature Considerations: Protect PAC from extreme temperatures. Avoid direct sunlight and high heat, which can degrade the product. While less common, freezing can also affect its properties.
  • Segregation: Store PAC away from incompatible materials, such as strong oxidizing agents, to prevent hazardous reactions.
  • Regular Checks: Periodically inspect stored PAC for any signs of degradation, such as caking or discoloration. Rotate stock to ensure the oldest material is used first.

By adhering to these guidelines for use and storage, you can maximize the benefits of Polyaluminium Chloride in your water treatment operations. As your reliable Polyaluminium Chloride supplier in China, we offer high-quality products and expert support. Contact us to buy PAC and discuss your needs; we are here to help you achieve superior water quality efficiently and cost-effectively.