Effective coagulation is the cornerstone of efficient water treatment, and Polyaluminium Chloride (PAC) is a leading chemical in this regard. However, achieving optimal results with PAC hinges on precise dosing and correct application methods. NINGBO INNO PHARMCHEM CO.,LTD., a leading manufacturer and supplier of water treatment chemicals, provides essential insights into maximizing PAC's performance.

The primary function of PAC as a coagulant is to destabilize and aggregate suspended particles, colloids, and dissolved organic matter in water, forming flocs that can be easily removed. Achieving this efficiently requires understanding how to dose and apply PAC correctly.

The Importance of Jar Testing for PAC Dosing

Before implementing PAC treatment on a large scale, conducting jar tests is an indispensable step. Jar testing allows water treatment professionals to determine:

  • Optimal PAC Dosage: The precise amount of PAC needed to effectively treat the specific water source. Overdosing can be inefficient and costly, while underdosing can lead to incomplete impurity removal.
  • Best PAC Grade: Different water conditions might benefit from specific PAC formulations (e.g., varying basicity or Al2O3 content).
  • Impact of pH: PAC's effectiveness is influenced by pH. Jar tests help identify the ideal pH range for coagulation and determine if pH adjustment is necessary before or after PAC addition.
  • Floc Formation and Settling Rate: Visual observation during jar tests helps assess the quality and settling speed of the flocs formed, providing critical data for process optimization.

When performing jar tests, it's crucial to simulate the actual plant conditions as closely as possible, including mixing speeds and times. NINGBO INNO PHARMCHEM, as a knowledgeable PAC supplier, can offer guidance on conducting effective jar tests for our products.

Key Considerations for PAC Application

Once the optimal dosage and grade are determined, proper application ensures PAC's efficiency:

  • Dilution: Solid PAC products are typically diluted with water to a specific concentration (e.g., 2-20%) before application. It is important to use clean water for dilution and to prepare solutions fresh, as they can degrade over time.
  • Dosing Point: PAC should be injected into the water flow at a point that allows for sufficient rapid mixing to distribute the chemical evenly. This is often followed by a period of slower mixing (flocculation) before sedimentation.
  • Mixing Intensity: Rapid initial mixing ensures thorough dispersion of PAC, while slower subsequent mixing promotes floc growth. The duration and intensity of mixing are critical for effective floc formation.
  • Continuous Dosing: For consistent treatment, especially in swimming pool applications or continuous flow systems, using peristaltic dosing pumps is recommended for accurate and continuous PAC delivery.

Your Trusted Partner for PAC Solutions

NINGBO INNO PHARMCHEM CO.,LTD. is committed to providing not only high-quality Polyaluminium Chloride but also the technical support necessary for its effective application. As a leading manufacturer and supplier in China, we empower our clients with the knowledge to optimize their water treatment processes. If you are looking to buy PAC and need expert advice on dosing and application, contact us. We offer competitive PAC prices and reliable supply, ensuring you achieve the best possible water quality.