In the realm of water treatment, coagulants are indispensable for achieving clarity and purity. Two prominent chemicals used for this purpose are Aluminum Sulfate (alum) and Polyaluminum Chloride (PAC). While both serve the primary function of destabilizing and aggregating suspended particles, they possess distinct characteristics that make them suitable for different applications and water conditions. Understanding these differences is crucial for selecting the most effective coagulant. NINGBO INNO PHARMCHEM CO.,LTD. offers both high-quality aluminum sulfate and PAC to meet diverse client needs.

Aluminum sulfate, or alum, has been a trusted coagulant for many years. It is highly effective, especially in waters with a specific pH range, typically between 5.5 and 7.5. In this range, it efficiently neutralizes charged particles and forms robust flocs. However, its performance can be significantly impacted by pH fluctuations; in waters with very low or very high pH, its effectiveness can diminish, potentially requiring pH adjustment. Alum is also known to consume alkalinity, which can further lower the pH and impact floc formation if the water's buffering capacity is insufficient.

Polyaluminum Chloride (PAC), on the other hand, is a more advanced inorganic polymer coagulant. PAC generally offers several advantages over traditional alum. It is effective across a much wider pH range, often performing well in both acidic and alkaline conditions without the need for extensive pH adjustment. This broader pH efficacy makes it a more versatile option for varied water sources. Furthermore, PAC often requires lower dosages compared to alum to achieve similar levels of turbidity removal. The flocs formed by PAC are typically denser and settle faster, which can improve the efficiency of sedimentation processes and reduce sludge production. The reason for PAC’s enhanced performance lies in its pre-polymerized aluminum species, which provide a more potent charge neutralization capability.

The choice between aluminum sulfate and PAC often depends on the specific characteristics of the water being treated, including its pH, alkalinity, turbidity, and the desired treatment outcomes. For water sources with stable pH and moderate turbidity, alum can be a cost-effective solution. However, for challenging water conditions, wider pH variations, or when faster settling and lower dosage requirements are critical, PAC often presents a superior choice. As a leading supplier in China, NINGBO INNO PHARMCHEM CO.,LTD. provides expertise to help clients select the optimal coagulant for their specific water treatment challenges, ensuring efficiency and cost-effectiveness.