For decades, aluminum sulfate (alum) has been a staple in water treatment, effectively removing impurities. However, the landscape of water purification chemicals is constantly evolving, and Polyaluminium Chloride (PAC) has emerged as a superior alternative, offering significant advantages in terms of performance, cost-effectiveness, and environmental impact. This article highlights why PAC is increasingly replacing traditional coagulants.

One of the most significant advantages of PAC over alum is its enhanced coagulant efficiency. PAC possesses a higher charge density due to its polymerized aluminum structure. This allows it to destabilize and remove suspended materials and colloidal particles more effectively, even at lower dosages. Consequently, users can achieve better water clarity and quality with less chemical input, leading to substantial cost savings.

Furthermore, PAC demonstrates superior performance across a wider range of pH and temperature conditions compared to alum. Alum's effectiveness is more sensitive to variations in pH and can be significantly hindered in cold water. PAC, on the other hand, maintains its coagulating power even at lower temperatures and across a broader pH spectrum, reducing the need for extensive pH adjustments and making it more reliable in diverse environmental conditions.

From an environmental perspective, PAC offers notable benefits. It produces less sludge volume than alum for equivalent treatment results, which simplifies sludge disposal and reduces associated environmental burdens. Additionally, the lower dosage requirements of PAC mean less overall chemical input, contributing to a reduced environmental footprint. The impact on treated water chemistry is also favorable; PAC typically results in lower residual aluminum levels and less impact on pH compared to alum.

The advantages extend to handling and storage. While both can be supplied in liquid or solid forms, PAC's properties often lead to reduced corrosivity and better stability, simplifying logistics and operational use. For those seeking to upgrade their water treatment processes, switching to Polyaluminium Chloride is a strategic move towards greater efficiency, cost savings, and improved environmental performance. If you are considering buying PAC, its advantages over traditional coagulants make it a compelling choice for modern water purification needs.