Introduction

PolyDADMAC, HYPERFLOC CP 636 PWG, HYPERFLOC CP 644 PWG, and HYPERFLOC CP 645 PWG are important cationic polymers widely used in water treatment, wastewater purification, sludge conditioning, and industrial solid-liquid separation.

Although all of these products have positive charges, their chemical structures and primary functions are different:

• PolyDADMAC (Polydiallyldimethylammonium chloride) is a highly cationic polymer mainly used as a coagulant for rapid charge neutralization.
• HYPERFLOC CP 636 PWG, CP 644 PWG, and CP 645 PWG are cationic polyacrylamide (CPAM) flocculants mainly used for floc formation, sludge dewatering, and solid-liquid separation.

In many treatment systems, PolyDADMAC and cationic polyacrylamide are used together. PolyDADMAC destabilizes fine particles first, while HYPERFLOC CP series polymers build larger flocs for easier separation.

1. Application of PolyDADMAC

1.1 Drinking Water Treatment

One of the major applications of PolyDADMAC is drinking water purification.

Raw water often contains:

• Clay particles
• Organic matter
• Suspended solids
• Algae
• Colloidal particles

These particles usually carry negative surface charges, preventing natural settling.

PolyDADMAC has a very high positive charge density, allowing it to quickly neutralize these negative charges.

Applications include:

• River water clarification
• Reservoir water treatment
• Drinking water plants
• Pretreatment before filtration

Benefits:

• Reduced turbidity
• Faster coagulation
• Improved filtration performance
• Lower usage of inorganic coagulants

PolyDADMAC is often used with:

• Aluminum sulfate
• Polyaluminum chloride (PAC)
• Ferric chloride

to improve overall coagulation efficiency.

2. Application of PolyDADMAC in Wastewater Treatment

PolyDADMAC is widely used in industrial wastewater treatment.

Industries generating wastewater suitable for PolyDADMAC treatment include:

• Textile dyeing
• Paper manufacturing
• Chemical production
• Petroleum refining
• Pharmaceutical production
• Food processing

PolyDADMAC removes:

• Suspended solids
• Organic colloids
• Color bodies
• Emulsified materials
• Fine particles

The main functions are:

Charge neutralization

PolyDADMAC neutralizes the electrical charges that stabilize suspended particles.

Destabilization of colloids

Once charges are neutralized, particles can combine into larger aggregates.

Improved flocculation

When followed by polyacrylamide addition, larger and stronger flocs are formed.

3. Application of PolyDADMAC in Color Removal

A special application of PolyDADMAC is wastewater color removal.

Industries such as:

• Textile dyeing
• Printing
• Pigment manufacturing
• Paper production

produce wastewater containing colored organic molecules.

PolyDADMAC can adsorb and neutralize negatively charged dye molecules.

Benefits:

• Reduced color intensity
• Improved wastewater appearance
• Better downstream biological treatment

It is especially effective for:

• Reactive dyes
• Acid dyes
• Direct dyes

4. Application of PolyDADMAC in Sludge Conditioning

PolyDADMAC is also used as a sludge conditioning agent.

Applications include:

• Municipal sludge treatment
• Industrial sludge treatment
• Biological sludge conditioning

PolyDADMAC improves sludge properties by:

• Reducing particle repulsion
• Improving aggregation
• Increasing floc density

A common treatment combination is:

PolyDADMAC + HYPERFLOC CP cationic polyacrylamide

Process:

1. PolyDADMAC neutralizes sludge particle charges.
2. HYPERFLOC CP polymer creates large flocs.
3. Mechanical equipment removes water.

This combination improves:

• Centrifuge performance
• Filter press efficiency
• Sludge cake dryness

5. Application of HYPERFLOC CP 636 PWG

HYPERFLOC CP 636 PWG is a cationic polyacrylamide flocculant designed mainly for wastewater and sludge treatment.

5.1 Municipal Sludge Dewatering

The primary application of HYPERFLOC CP 636 PWG is municipal sludge dewatering.

Wastewater sludge contains:

• Organic solids
• Biological particles
• Microorganisms
• Fine suspended matter

These particles are negatively charged and difficult to separate.

HYPERFLOC CP 636 PWG creates strong flocs that improve:

• Sludge settling
• Water release
• Dewatering efficiency

Used equipment:

• Centrifuges
• Belt presses
• Screw presses
• Filter presses

5.2 Industrial Wastewater Treatment

HYPERFLOC CP 636 PWG is suitable for wastewater from:

• Food factories
• Beverage plants
• Paper mills
• Chemical plants
• Textile factories

It improves:

• Suspended solids removal
• Clarifier operation
• Sludge concentration

5.3 Paper Industry Application

In paper manufacturing, HYPERFLOC CP 636 PWG functions as:

• Retention aid
• Drainage aid
• Fiber recovery polymer

It improves:

• Fiber retention
• Paper machine efficiency
• White water clarification

6. Application of HYPERFLOC CP 644 PWG

HYPERFLOC CP 644 PWG is a higher-performance cationic polyacrylamide designed for difficult sludge and wastewater applications.

6.1 Difficult Sludge Dewatering

CP 644 PWG is used for sludge with:

• High organic content
• Poor settling characteristics
• High water retention

Applications:

• Activated sludge
• Industrial biological sludge
• Mixed municipal sludge

Advantages:

• Stronger flocs
• Better filtration
• Higher cake solids

6.2 Food and Agricultural Wastewater

HYPERFLOC CP 644 PWG is suitable for wastewater containing:

• Proteins
• Fats
• Organic solids

Applications:

• Dairy wastewater
• Meat processing wastewater
• Brewery wastewater
• Food processing wastewater

It improves:

• Clarification
• Sludge separation
• Treatment efficiency

7. Application of HYPERFLOC CP 645 PWG

HYPERFLOC CP 645 PWG is a high-performance cationic polyacrylamide flocculant used where excellent floc strength and dewatering performance are required.

7.1 High Efficiency Sludge Dewatering

Applications include:

• Large municipal wastewater plants
• Industrial treatment facilities
• Sludge disposal systems

Benefits:

• High solids capture
• Improved centrifuge output
• Reduced sludge volume

7.2 Dissolved Air Flotation (DAF)

HYPERFLOC CP 645 PWG can be used in DAF systems treating:

• Food wastewater
• Oil-containing wastewater
• Industrial process water

It improves:

• Floating sludge formation
• Suspended solids removal
• Water clarity

7.3 Industrial Solid-Liquid Separation

Industries using CP 645 PWG include:

• Chemical processing
• Paper production
• Manufacturing wastewater systems

It helps separate:

• Organic solids
• Fine suspended particles
• Precipitated materials

8. Comparison Between PolyDADMAC and HYPERFLOC CP Series

Conclusion

PolyDADMAC, HYPERFLOC CP 636 PWG, HYPERFLOC CP 644 PWG, and HYPERFLOC CP 645 PWG are essential cationic polymers used in modern water treatment and solid-liquid separation.

• PolyDADMAC is mainly used as a powerful coagulant for charge neutralization, drinking water treatment, wastewater clarification, and color removal.
• HYPERFLOC CP 636 PWG is widely used for general sludge dewatering and wastewater treatment.
• HYPERFLOC CP 644 PWG provides stronger flocculation for challenging industrial sludge.
• HYPERFLOC CP 645 PWG is designed for high-performance sludge separation and demanding dewatering applications.