The effective application of any chemical in water treatment hinges on a deep understanding of its properties and optimal usage parameters. Polyaluminum Chloride (PAC) is a powerful coagulant, but maximizing its performance requires attention to detail. As a leading manufacturer and supplier, we provide essential technical insights for professionals looking to leverage PAC effectively in their water treatment processes.

Understanding PAC's Mechanism: PAC functions by introducing highly charged aluminum species into the water. These species neutralize the negative charges of suspended particles, colloids, and dissolved organic matter, destabilizing them. This process is followed by the formation of aluminum hydroxide precipitates, which entrap the destabilized impurities, forming larger flocs. The effectiveness of this process is influenced by several factors, including pH, temperature, and the nature of the contaminants.

Optimal pH Range: While PAC is known for its wide pH applicability, achieving peak coagulation efficiency generally occurs within a pH range of 5 to 9. For potable water treatment, a pH between 6.5 and 7.6 is often considered ideal. For industrial wastewater, the optimal pH can vary depending on the specific contaminants present. It is crucial to monitor and, if necessary, adjust the pH of the raw water before or during PAC addition. Incorrect pH can lead to incomplete charge neutralization and inefficient floc formation, impacting overall treatment efficacy. We recommend consulting our technical team for specific pH guidance related to your water source.

Dosage Determination: The correct dosage of PAC is critical and highly dependent on the raw water quality, including turbidity, alkalinity, temperature, and the concentration of pollutants. Overdosing can lead to residual aluminum, while underdosing results in incomplete treatment. The most reliable method for determining the optimal dosage is through jar testing. This laboratory procedure involves treating small samples of the raw water with varying concentrations of PAC to identify the dosage that produces the best floc formation, settling, and water clarity. As a reliable supplier, we can provide guidance on conducting jar tests and recommend appropriate starting dosages for our Polyaluminum Chloride (CAS 1327-41-9).

Application and Mixing: PAC can be applied either as a solid powder or as a liquid solution. Preparing a solution typically involves dissolving the powder in water at a specific concentration (e.g., 10-20%). It is generally recommended to prepare fresh solutions daily, as concentrated PAC solutions can hydrolyze over time. Proper mixing is essential to ensure homogeneous distribution of the coagulant throughout the water. Rapid mixing initially disperses the PAC, followed by slower, longer mixing to facilitate flocculation. When used in conjunction with other treatment chemicals like polymers, the sequence of addition is crucial; typically, the coagulant is added first.

For professionals seeking to optimize their water treatment processes, understanding these technical aspects is key. By choosing a quality product from a trusted manufacturer and applying it correctly, you can maximize the benefits of Polyaluminum Chloride. We invite you to buy PAC from us and leverage our expertise to achieve superior water treatment results. Contact us for detailed technical specifications and application support.