Liquid PolyDADMAC Coagulant for Drinking Water Clarification and Sludge Reduction

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Liquid PolyDADMAC Coagulant for Drinking Water Clarification and Sludge Reduction

BLUWAT Liquid PolyDADMAC is a high charge density cationic polymer coagulant used for drinking water clarification, turbidity reduction, suspended solids removal and sludge reduction.

In drinking water treatment and municipal water purification systems, raw water may contain fine suspended solids, colloids, clay particles, organic matter and turbidity-causing impurities. These particles are often difficult to remove by simple settling because they remain stable in water.

Liquid PolyDADMAC provides strong positive charges to neutralize negatively charged particles. This helps particles lose stability, gather into larger flocs and separate more easily by sedimentation and filtration.

BLUWAT BLU DA Series Liquid PolyDADMAC is available in 20% to 50% solid content grades and different viscosity levels. It can be selected according to raw water quality, turbidity, treatment process and dosing system requirements.

Product Overview

PolyDADMAC, also known as PDADMAC or Poly Dimethyl Diallyl Ammonium Chloride, is a water-soluble cationic polymer. It is widely used in drinking water treatment, wastewater treatment, sludge dewatering, paper making, textile wastewater, mining water and industrial water purification.

For drinking water clarification, Liquid PolyDADMAC can be used as an organic coagulant or as a coagulant aid together with Polyaluminium Chloride. In many systems, the combination of PolyDADMAC and PAC can improve floc formation, settling speed and final water clarity.

The liquid form makes it easy to dilute, pump and dose. It is suitable for automatic dosing systems in municipal water treatment plants and industrial water purification facilities.

Key Benefits

Technical Information

Available Liquid PolyDADMAC Grades

BLUWAT supplies Liquid PolyDADMAC in different solid content and viscosity grades.

20% solid content series includes DA 201, DA 202, DA 203, DA 204 and DA 205.

40% solid content series includes DA 401, DA 402, DA 403, DA 404, DA 405, DA 406, DA 407 and DA 408.

45% solid content grade includes DA 451.

50% solid content series includes DA 501, DA 502, DA 503, DA 504, DA 505, DA 506 and DA 507.

Different grades are available from low viscosity to very high viscosity. The suitable grade can be selected according to raw water quality, turbidity level, suspended solids concentration, required floc size, dosing system and treatment process.

Application in Drinking Water Clarification

In drinking water treatment plants, raw water from rivers, lakes, reservoirs or groundwater sources may contain turbidity, fine particles and organic matter. When these impurities are not removed effectively, they can increase filter load and reduce final water clarity.

Liquid PolyDADMAC helps improve the coagulation process. After dosing, it neutralizes the surface charges of fine particles and colloids. These particles can then gather into larger flocs, which are easier to settle and filter.

Typical use areas include:

• Raw water clarification
• Turbidity reduction
• Suspended solids removal
• Filter load reduction support
• Floc formation improvement
• Sedimentation process support
• Sludge dewatering support

Application in Sludge Reduction and Dewatering

Water treatment and wastewater treatment processes generate sludge after coagulation and clarification. If sludge volume is too high or sludge is difficult to dewater, operating cost can increase.

Liquid PolyDADMAC can support better sludge conditioning and solid-liquid separation. In suitable treatment systems, it can help improve sludge structure, support dewatering performance and reduce the burden of sludge handling.

It can be used before filter press, belt press, screw press, centrifuge or other sludge dewatering equipment according to the plant design.

How Liquid PolyDADMAC Works

Most fine particles and colloids in raw water carry negative charges. These charges keep the particles dispersed and stable in water.

PolyDADMAC provides strong positive charges. After it is added into the water, it neutralizes the negative charges on suspended particles and colloids. Once destabilized, the particles can collide and form larger flocs.

These flocs can then be removed by sedimentation, filtration or other solid-liquid separation processes.

This charge neutralization mechanism makes PolyDADMAC suitable for drinking water clarification and sludge reduction support.

Recommended Use Method

For water treatment, Liquid PolyDADMAC can be used together with Polyaluminium Chloride for turbid river water, tap water and similar water sources.

When used alone, it is recommended to dilute the product to 0.5% to 5% concentration based on solid content before dosing.

The actual dosage depends on raw water turbidity, suspended solids concentration, organic matter, pH value and target water clarity. Jar testing is recommended before full-scale application.

The dosing point and mixing speed should be carefully controlled. The chemical should be mixed evenly with water, but excessive mixing should be avoided after flocs are formed because strong shear may break the flocs.

Typical Drinking Water Treatment Process

Typical Sludge Conditioning Process

Product Selection Guide

Choose low viscosity grades when easy pumping and fast dilution are required.

Choose medium viscosity grades for general drinking water clarification and municipal water treatment.

Choose high viscosity grades when stronger floc formation or better sludge conditioning is needed.

For raw water with high turbidity or variable seasonal quality, jar test is recommended to confirm the correct grade and dosage.

For sludge reduction and sludge dewatering applications, on-site trial is recommended to evaluate filtrate clarity, sludge cake moisture and chemical cost.

Packaging

BLUWAT Liquid PolyDADMAC is available in:

• 25L plastic drum
• 200L plastic drum
• 1000L IBC drum

Packaging can be selected according to order quantity, storage condition and dosing system requirements.

Storage

Store the product in original sealed containers in a cool and dry place. Keep away from heat, flame and direct sunlight.

Please refer to the product label, TDS and MSDS for detailed handling, storage and shelf life information.

Why Choose BLUWAT Liquid PolyDADMAC

BLUWAT Chemicals is a professional manufacturer of water treatment chemicals with more than 25 years of manufacturing experience.

We supply PolyDADMAC, Polyamine, Polyaluminium Chloride, Polyacrylamide, Water Decoloring Agent, Aluminum Chlorohydrate and other water treatment chemicals for municipal water, industrial wastewater, textile wastewater, paper mill wastewater, mining water and sludge dewatering applications.

BLUWAT Liquid PolyDADMAC offers stable quality, flexible grade selection, factory direct supply and technical support for global customers.

Frequently Asked Questions