Bluwat PolyDADMAC DA 401 Coagulant for Municipal Waterworks Turbidity Removal
Product Overview
Bluwat PolyDADMAC DA 401 is a liquid cationic polymer based on Poly(dimethyldiallylammonium chloride), also known as PolyDADMAC or PDADMAC. It belongs to the BLU DA Series PolyDADMAC Liquid Grade and is designed for water treatment applications requiring fast charge neutralization and easy dosing.
Municipal waterworks often treat raw water from rivers, reservoirs, lakes, canals, or other surface water sources. These waters may contain clay, silt, algae, organic matter, colloids, and fine suspended particles. Because these particles are usually negatively charged, they can remain stable in water and are difficult to remove by simple settling or filtration.
Bluwat PolyDADMAC DA 401 provides strong cationic charge to neutralize suspended particles and colloids. As a low molecular weight and low-viscosity 40% liquid grade, DA 401 is easy to dilute, pump, and disperse in water treatment systems. It can be used as a primary coagulant or as a coagulant aid together with PAC, alum, ACH, or ferric salts.
Application in Municipal Waterworks
DA 401 is suitable for municipal water treatment plants that need efficient turbidity removal and stable clarification performance.
Typical applications include:
Why DA 401 Is Suitable for Municipal Waterworks
DA 401 is a 40% liquid PolyDADMAC grade with low molecular weight and viscosity below 500 cps. This makes it especially suitable for municipal dosing systems where fast dilution, good dispersion, and stable chemical feeding are important.
Because DA 401 has high cationic charge density, it can quickly neutralize negatively charged particles in raw water. This helps improve coagulation efficiency, reduce residual turbidity, and support clearer water before filtration.
Key Benefits
Low Viscosity for Easy Dosing
DA 401 has Brookfield viscosity below 500 cps, making it easier to pump, dilute, and distribute evenly in municipal water treatment systems.
40% Liquid Active Content
With 39.0–41.0% solid content, DA 401 provides concentrated liquid PolyDADMAC performance while remaining convenient for liquid chemical handling.
High Charge Density
DA 401 provides strong cationic charge to neutralize negatively charged clay, silt, algae, organic matter, and colloidal particles in raw water.
Fast Turbidity Removal
By improving particle destabilization and floc formation, DA 401 helps reduce turbidity and improve clarified water quality.
Improved Sedimentation and Filtration
Better floc formation can reduce fine solids carryover into filters, helping improve filtration stability and reduce filter loading.
Can Be Used Alone or with PAC
DA 401 can be used as a primary organic coagulant or together with inorganic coagulants such as Polyaluminium Chloride to improve overall clarification performance.
Effective at Optimized Dosage
Due to its high charge density, DA 401 can support efficient coagulation at optimized dosage levels after jar testing.
Suitable for Variable Raw Water Conditions
DA 401 can be tested for different municipal raw water sources, including river water, reservoir water, and lake water.
Working Principle
DA 401 improves turbidity removal mainly through charge neutralization.
Treatment mechanism:
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1Raw water contains negatively charged clay, silt, algae, organic colloids, and suspended particles.
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2DA 401 provides strong positive charge to neutralize particle surfaces.
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3Destabilized particles begin to collide and aggregate.
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4Larger flocs form during the flocculation stage.
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5Flocs settle in clarifiers or are removed by filtration.
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6Clarified water has lower turbidity and reduced suspended solids.
Recommended Treatment Process
Product Specifications
| Product Name | Bluwat PolyDADMAC DA 401 |
| Series | BLU DA Series PolyDADMAC Liquid Grade |
| Chemical Name | Poly(dimethyldiallylammonium chloride) |
| Short Name | PolyDADMAC / PDADMAC |
| CAS Number | 26062-79-3 |
| Appearance | Colorless to light yellow liquid |
| Solid Content | 39.0–41.0% |
| pH Value | 3.0–7.0 |
| Specific Gravity at 25°C | 1.01–1.10 |
| Charge Type | Cationic |
| Charge Density | High charge density |
| Relative Molecular Weight | Low |
| Brookfield Viscosity at 25°C | Below 500 cps |
| Application Fields | Drinking water treatment, wastewater treatment, sludge dewatering, mining, paper-making, textile, oil industry, color removal, and industrial clarification |
| Package | 25L plastic drum, 200L plastic drum, or 1000L IBC drum |
DA 401 Product Positioning
DA 401
Solid Content: 39.0–41.0%
Relative Molecular Weight: Low
Brookfield Viscosity: Below 500 cps
Recommended Use: Municipal waterworks turbidity removal, raw water clarification, fast charge neutralization, and low-viscosity liquid dosing systems.
DA 401 is suitable when the treatment system requires quick dispersion and strong cationic charge neutralization rather than high-viscosity polymer bridging.
Application Method
For municipal waterworks turbidity removal, DA 401 should be selected according to raw water turbidity, suspended solids concentration, organic matter, algae content, water temperature, pH value, treatment process, and clarified water quality target.
When used alone, DA 401 is normally diluted to 0.5–5% concentration based on solid content before dosing.
The optimum dosage should be confirmed by jar testing and plant trials. The dosing point and mixing speed should be carefully controlled to ensure uniform chemical dispersion and proper floc formation. Excessive shear should be avoided after flocs are formed.
For potable water applications, customers should confirm the applicable certificate scope, maximum use level, and local drinking water regulations before commercial use.
Use with PAC or Other Coagulants
DA 401 can be used alone or together with inorganic coagulants such as PAC, alum, ACH, ferric chloride, or ferric sulfate.
DA 401 mainly provides strong charge neutralization.
PAC, alum, ACH, and ferric salts mainly provide inorganic coagulation and hydroxide floc formation.
Combined use may improve floc quality, turbidity removal, settling performance, and filter operation. The best dosing sequence and dosage should be confirmed through jar testing using actual raw water samples.
Product Selection Guidance
DA 401 is recommended for water treatment systems requiring:
For high turbidity water, algae-heavy water, or difficult colloidal particles requiring stronger floc structure, higher molecular weight PolyDADMAC grades such as DA 404, DA 405, or other suitable grades may also be tested.
Final product selection should be based on turbidity removal, floc size, settling speed, clarified water quality, filter performance, dosage, and total treatment cost.
Packaging and Storage
Bluwat PolyDADMAC DA 401 is available in:
Store the product in original containers in a cool and dry place. Keep away from heat, flame, and direct sunlight. Refer to the TDS, MSDS, product label, and applicable regulatory documents for detailed storage and handling information.
Why Choose Bluwat PolyDADMAC DA 401?
Bluwat Chemicals is a professional manufacturer and exporter of water treatment chemicals, supplying PolyDADMAC, PAC, PAM, ACH, Polyamine, and other coagulants and flocculants for municipal and industrial water treatment.
Advantages: