Case Study Application of Polydadmac in Drinking Water Treatment Plant

Customer Case Study

Application of Polydadmac in Drinking Water Treatment

Client Background
A municipal drinking water treatment plant serving approximately 800,000 residents uses surface water as its main raw water source. Due to seasonal rainfall and upstream activities, the plant experiences significant fluctuations in turbidity and organic matter. During high-turbidity periods, conventional inorganic coagulants (PAC or alum) required high dosages, generated excessive sludge, and caused unstable effluent turbidity.

The client sought a solution that could improve coagulation efficiency, reduce chemical consumption, and ensure stable compliance with drinking water quality standards.

Challenges

• Raw water turbidity fluctuating between 30–300 NTU

• Seasonal increase of natural organic matter affecting coagulation performance

• High dosage of inorganic coagulants and large sludge volume

• Requirement for safe, reliable chemicals suitable for potable water treatment

Bluwat Solution

After laboratory evaluation and jar tests, Bluwat’s technical team recommended a dual-coagulant system using Polydadmac combined with PAC.

Treatment Concept

• Polydadmac (high cationic charge density): rapid charge neutralization, destabilizing colloids and fine particles

• PAC: formation of strong floc structure to enhance sedimentation and filtration

• Optimized dosing sequence and dosage based on the client’s raw water characteristics

Operating Parameters (Typical)

Actual dosage adjusted according to raw water quality

• Polydadmac dosage: 0.5–2.0 mg/L

• PAC dosage: 20–35% reduction compared with the original process

• Effective pH range: 6.5–8.5

• Dosing point: rapid mixing stage (Polydadmac)

Treatment Results

After implementation, the plant achieved clear and consistent improvements:

• Finished water turbidity: consistently ≤ 0.5 NTU

• Faster floc formation with denser and stronger flocs

• Overall chemical cost reduction of approximately 15–25%

• Lower sludge production, simplifying sludge handling and dewatering

• Improved operational stability, even during high-turbidity shock loads

Client Feedback

“After introducing Polydadmac, our coagulation system became much more stable. We achieved lower turbidity with reduced PAC consumption and less sludge, which significantly improved our overall operation efficiency.”

Why Bluwat Polydadmac?

• NSF/ANSI/CAN 60 Certified
  Bluwat Polydadmac is certified to NSF/ANSI/CAN 60 – Drinking Water Treatment Chemicals: Health Effects, confirming its safety and suitability for use in potable water treatment systems.

• Proven Safety for Drinking Water Applications
  The NSF/ANSI/CAN 60 certification ensures that Bluwat Polydadmac meets strict health-effect requirements, with controlled impurities and compliance with regulatory limits for chemicals used in drinking water.

• High Cationic Charge Density & Fast Coagulation
  Provides rapid charge neutralization, effective destabilization of colloids, and quick formation of dense flocs, even under fluctuating raw water conditions.

• Excellent Compatibility with Inorganic Coagulants
  Works efficiently with PAC, alum, and ferric salts, allowing significant reduction of inorganic coagulant dosage and overall treatment cost.

• Consistent Quality & Stable Performance
  Manufactured under strict quality control to ensure stable molecular weight distribution and repeatable performance batch after batch.

• Reduced Sludge Production
  Lower inorganic coagulant demand results in less sludge generation, simplifying sludge handling and reducing disposal costs.

• Global Supply & Technical Support
  Backed by Bluwat Chemicals’ extensive experience in municipal and industrial water treatment projects, with full technical support from jar testing to on-site optimization.

Conclusion

By integrating Bluwat Polydadmac into the drinking water treatment process, the customer successfully enhanced coagulation efficiency, stabilized finished water quality, and reduced both chemical usage and sludge generation. This solution is especially effective for surface water sources with fluctuating turbidity and organic content.

For detailed technical data, compliance documents, or a customized drinking water treatment solution, please contact the Bluwat Chemicals technical team.