Chemicals Corner

Insights from Grasim Industries Ltd.

The Coagulant Shift: Why More Industries Are Choosing PAC Over Traditional Alum

In the world of water treatment, evolution is constant—and smart choices matter. For decades, Alum (Aluminum Sulfate) has been the backbone of coagulation across industries. Reliable and effective, yes—but as efficiency, sustainability, and cost come under the spotlight, a new contender is rising fast: Poly Aluminum Chloride (PAC).

At Grasim Industries Ltd., we’ve seen firsthand how PAC is transforming processes across sectors—from municipal water treatment to industrial effluent management. Here's why more and more industries are making the shift.

Smarter Chemistry, Better Performance

PAC brings next-gen chemistry to the table. It’s pre-polymerized, meaning faster action, tighter floc formation, and lower dosages compared to traditional Alum. It performs across a broader pH range, making it adaptable to changing water quality conditions. And with less sludge, you’re cutting costs on both disposal and downtime.

Cleaner, Clearer, and More Sustainable

One of the major advantages of PAC is the reduction in residual aluminum levels, leading to improved water clarity and quality—critical in industries with stringent standards. Combine that with lower sludge volume and better filtration rates, and you’re looking at an efficient, eco-friendly solution.

PAC supports the long-term shift toward sustainability, helping industries minimize waste while maximizing performance.

Where PAC Shines

• Municipal Water Treatment
  Enhances turbidity removal, particularly effective during seasonal changes or high raw water variations.
  
  
• Pulp & Paper Manufacturing
  Increases retention and drainage, improving sheet formation and reducing downtime.
  
  
• Textile & Dyeing
  Excels in reducing color, COD, and suspended solids — especially in high-load wastewater.
  
  
• Food & Beverage
  High-purity PAC is ideal for sensitive applications with minimal residual impact.

PAC vs Alum: A Real-World Perspective

It’s not just chemistry on paper—it’s performance on the ground. Operators tell us they notice faster floc formation and quicker settling with PAC, especially in plants dealing with variable input water. Maintenance teams appreciate reduced sludge handling, and procurement teams are seeing the benefits of using less product to achieve better outcomes.

PAC’s broader pH tolerance provides flexibility during seasonal water changes, and its stability during storage ensures consistent performance. When you factor in reduced downtime, fewer filter backwashes, and compliance with tighter environmental norms, the case for PAC becomes even stronger.

A Forward-Thinking Choice

Choosing PAC isn’t just a performance upgrade—it’s a step toward smarter, more sustainable operations. From municipal systems to complex industrial setups, Grasim Industries Ltd. is helping organizations achieve cleaner water, streamlined processes, and long-term efficiency.

We provide high-quality PAC solutions supported by deep technical expertise and a strong focus on your operational goals. Let’s work together to bring intelligent chemistry to your treatment processes.

Grasim Industries Ltd.
Visit www.adityabirlachemicals.com or connect with our water treatment specialists for tailored solutions.