Effectively utilizing Polyaluminium Chloride (PAC) is crucial for achieving optimal water treatment results. As a powerful inorganic polymer coagulant, PAC's performance hinges on correct application methods, dosage, and control of water parameters. This guide provides essential insights for R&D scientists, formulators, and procurement managers on how to best use PAC for industrial and municipal water purification.

Polyaluminium Chloride, commonly available as a yellow or white powder with CAS No. 1327-41-9, can be applied in two primary ways: direct addition or as a pre-configured solution. Direct addition involves adding the solid PAC directly to the water body to be treated, following predetermined optimal dosages established through jar tests. Alternatively, PAC can be prepared into a solution, often by dissolving it in heated water with continuous stirring. While this adds a step, it can sometimes lead to better dispersion and immediate efficacy. It's generally recommended to use prepared solutions within 24 hours.

A critical aspect of PAC application is managing the pH of the water. PAC itself is acidic, and its effectiveness as a coagulant is highly pH-dependent. For acidic wastewater, alkaline substances may be needed to raise the pH to the optimal range for flocculation. Conversely, for alkaline wastewater, acidic substances might be required. The ideal pH range for PAC typically falls between 5.0 and 8.5, but this can vary depending on the specific water matrix and the type of contaminants present. Always consult product specifications and perform tests.

Mixing and stirring are also vital. Proper agitation ensures that the PAC is thoroughly dispersed and comes into contact with the suspended solids and colloids, promoting efficient floc formation. The stirring speed and duration should be carefully controlled—typically 1-3 minutes of mechanical stirring at 10-35 r/min is recommended. Pay attention to water temperature, as it can influence reaction rates; lower temperatures may slow down coagulation, while higher temperatures can enhance it.

When considering purchasing Polyaluminium Chloride, partnering with a reputable manufacturer and supplier is key. They can provide guidance on optimal dosing, application techniques, and ensure product quality and consistency. For industrial buyers looking to buy PAC, understanding these usage principles ensures they maximize the benefits of this advanced water treatment chemical, achieving superior water clarity and compliance with environmental standards. We, as a leading supplier, are here to support your efforts with expert advice and high-quality products.