When embarking on the crucial task of water treatment, selecting the right coagulant is paramount. Polyaluminium Chloride (PAC) has emerged as a leading choice due to its efficiency, cost-effectiveness, and versatility. However, not all PACs are created equal. Understanding the different types and their applications is key to optimizing your water treatment processes. As a dedicated manufacturer and supplier of high-quality water treatment chemicals, NINGBO INNO PHARMCHEM CO.,LTD. aims to guide procurement managers and R&D scientists in making informed decisions.

PACs are inorganic polymer flocculants based on aluminum ions. They work by neutralizing the negative charges on suspended particles in water, causing them to aggregate into larger flocs that can be easily removed through sedimentation or filtration. The primary differentiating factors among PAC products include their Al2O3 content, basicity, and the drying method used in their production (e.g., spray drying vs. drum drying).

Key PAC Specifications to Consider:

  • Al2O3 Content: This indicates the actual aluminum oxide concentration, directly correlating with the product's coagulating power. Higher Al2O3 content generally means greater efficiency. For instance, a PAC with ≥30% Al2O3 content is often preferred for demanding applications.
  • Basicity: Basicity refers to the degree of hydroxyl substitution on the aluminum cation. Higher basicity (e.g., 40-95%) often leads to better performance across a wider pH range and can reduce the impact on treated water pH.
  • Appearance: PAC is commonly available as white, light yellow, yellow, or brown powder. While color can sometimes indicate production methods and purity, it's essential to rely on the full specification sheet. White PAC is typically associated with drinking water grade due to its higher purity.
  • Drying Method: Spray-dried PAC generally offers better solubility and a finer particle size, leading to faster dissolution and reaction times.

Applications of Different PAC Grades:

Different grades of PAC are tailored for specific applications:

  • Drinking Water Treatment: For potable water, high purity is essential. Grades with white or pale yellow appearance and minimal impurities (e.g., low heavy metals) are preferred. If you are looking to buy PAC for drinking water treatment, always ensure it meets relevant national standards like GB15892-2009.
  • Industrial Wastewater Treatment: This category is broad, encompassing effluents from textiles, paper mills, mining, and food processing. PACs with higher Al2O3 content and moderate to high basicity are highly effective. When you purchase Polyaluminium Chloride for industrial use, consider the specific contaminants and required pH range of your wastewater.
  • Paper Industry: PAC serves as a sizing agent and retention aid in papermaking, improving paper strength and clarity.

Choosing a Reliable PAC Supplier in China:

When sourcing PAC, it's crucial to partner with a reputable manufacturer and supplier. Look for suppliers who can provide detailed product specifications, certifications (like ISO9001), and consistent quality. NINGBO INNO PHARMCHEM CO.,LTD. is committed to being your trusted Polyaluminium Chloride supplier in China, offering competitive pricing and excellent technical support to help you find the ideal PAC solution. Contact us today to get a quote for your bulk requirements and samples.