PDADMAC Liquid Polymer for Reservoir and Lake Water Clarification
Product Overview
PDADMAC, also known as PolyDADMAC or Poly(dimethyldiallylammonium chloride), is a liquid cationic polymer with strong charge neutralization ability. It is widely used in drinking water treatment, wastewater treatment, sludge dewatering, mining, paper-making, textile, oil industry, and industrial clarification applications.
Reservoir and lake water often contains fine clay, silt, algae, natural organic matter, microorganisms, colloids, and suspended particles. These impurities are usually negatively charged and can remain stable in water, especially when turbidity is low but colloidal particles are difficult to settle.
Bluwat PDADMAC Liquid Polymer provides strong positive charge to destabilize these particles and promote floc formation. It can be used as a primary coagulant or as a coagulant aid together with PAC, alum, ACH, or ferric salts to improve clarification, sedimentation, and filtration performance.
Application in Reservoir and Lake Water Clarification
Reservoir and lake water quality may change with seasons, rainfall, algae growth, temperature, and watershed runoff. A stable coagulation and flocculation program helps water treatment plants manage these variations and maintain consistent clarified water quality.
Bluwat PDADMAC Liquid Polymer can be used in:
Key Benefits
High Charge Density for Effective Clarification
PDADMAC provides strong cationic charge to neutralize negatively charged colloids, clay, silt, algae-associated particles, and fine suspended solids in reservoir and lake water.
Suitable for Low to Medium Turbidity Surface Water
Reservoir and lake water may have lower turbidity than river water, but fine colloids and algae particles can still be difficult to remove. PDADMAC helps destabilize these particles and improve floc formation.
Improved Floc Formation
The product helps fine particles aggregate into larger and more settleable flocs, improving sedimentation and clarification efficiency.
Better Filtration Performance
By reducing fine particle carryover from clarification, PDADMAC helps lower filter loading and improve the stability of downstream filtration systems.
Can Be Used Alone or with PAC
PDADMAC can be used as a primary coagulant or combined with Polyaluminium Chloride to improve floc strength, settling speed, and clarified water quality.
Effective at Optimized Low Dosage
Because of its high charge density, PDADMAC can support efficient clarification at optimized dosage levels after jar testing.
Easy Liquid Dosing
Liquid PDADMAC is easy to dilute, pump, and dose continuously, making it suitable for automatic chemical dosing systems in water treatment plants.
Flexible Grade Selection
Bluwat offers 20%, 40%, 45%, and 50% liquid PDADMAC grades with different molecular weight and viscosity options to match different raw water conditions.
Working Principle
PDADMAC improves reservoir and lake water clarification mainly through charge neutralization and floc formation.
Treatment mechanism:
- Reservoir or lake water contains negatively charged clay, silt, algae, organic matter, colloids, and fine suspended particles.
- PDADMAC provides strong positive charge to neutralize particle surfaces.
- Destabilized particles begin to collide and aggregate.
- Larger flocs form during the flocculation stage.
- Flocs are removed by sedimentation, clarification, flotation, or filtration.
- Clarified water quality improves before final filtration and disinfection.
Recommended Treatment Process
Product Specifications
| Product Name | PDADMAC Liquid Polymer |
| Series | BLU DA Series PolyDADMAC Liquid Grade |
| Chemical Name | Poly(dimethyldiallylammonium chloride) |
| Short Name | PDADMAC / PolyDADMAC |
| CAS Number | 26062-79-3 |
| Appearance | Colorless to light yellow liquid |
| Solid Content | 20–50% |
| 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, medium, high, and very high grades available |
| Brookfield Viscosity at 25°C | Below 200 cps to above 15000 cps depending on grade |
| 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 |
Available PDADMAC Liquid Grades
DA 20% Series
DA 201
Solid Content: 19.0–21.0%
Relative Molecular Weight: Low
Brookfield Viscosity: Below 200 cps
Recommended Use: Low-viscosity dosing systems, fast dilution, and easy dispersion in reservoir and lake water clarification.
DA 202
Solid Content: 19.0–21.0%
Relative Molecular Weight: Medium
Brookfield Viscosity: 200–700 cps
Recommended Use: General surface water clarification and turbidity removal.
DA 203
Solid Content: 19.0–21.0%
Relative Molecular Weight: Medium
Brookfield Viscosity: 700–1000 cps
Recommended Use: Balanced coagulation and flocculation performance.
DA 204
Solid Content: 19.0–21.0%
Relative Molecular Weight: High
Brookfield Viscosity: 1000–2000 cps
Recommended Use: Higher turbidity water or stronger floc formation requirements.
DA 205
Solid Content: 19.0–21.0%
Relative Molecular Weight: Very High
Brookfield Viscosity: 2000–3000 cps
Recommended Use: Difficult raw water conditions requiring stronger floc structure.
DA 40% Series
DA 401
Solid Content: 39.0–41.0%
Relative Molecular Weight: Low
Brookfield Viscosity: Below 500 cps
DA 402
Solid Content: 39.0–41.0%
Relative Molecular Weight: Medium
Brookfield Viscosity: 500–1000 cps
DA 403
Solid Content: 39.0–41.0%
Relative Molecular Weight: Medium
Brookfield Viscosity: 1000–3000 cps
DA 404
Solid Content: 39.0–41.0%
Relative Molecular Weight: High
Brookfield Viscosity: 3000–5000 cps
DA 405
Solid Content: 39.0–41.0%
Relative Molecular Weight: High
Brookfield Viscosity: 5000–8000 cps
DA 406
Solid Content: 39.0–41.0%
Relative Molecular Weight: Very High
Brookfield Viscosity: 8000–12000 cps
DA 407
Solid Content: 39.0–41.0%
Relative Molecular Weight: Very High
Brookfield Viscosity: 12000–15000 cps
DA 408
Solid Content: 39.0–41.0%
Relative Molecular Weight: Very High
Brookfield Viscosity: Above 15000 cps
DA 45% Series
DA 451
Solid Content: 44.0–46.0%
Relative Molecular Weight: High
Brookfield Viscosity: 8000–12000 cps
DA 50% Series
DA 501
Solid Content: 49.0–51.0%
Relative Molecular Weight: Low Medium
Brookfield Viscosity: 1000–2000 cps
DA 502
Solid Content: 49.0–51.0%
Relative Molecular Weight: Medium
Brookfield Viscosity: 2000–3000 cps
DA 503
Solid Content: 49.0–51.0%
Relative Molecular Weight: High
Brookfield Viscosity: 3000–5000 cps
DA 504
Solid Content: 49.0–51.0%
Relative Molecular Weight: High
Brookfield Viscosity: 5000–8000 cps
DA 505
Solid Content: 49.0–51.0%
Relative Molecular Weight: Very High
Brookfield Viscosity: 8000–12000 cps
DA 506
Solid Content: 49.0–51.0%
Relative Molecular Weight: Very High
Brookfield Viscosity: 12000–15000 cps
DA 507
Solid Content: 49.0–51.0%
Relative Molecular Weight: Very High
Brookfield Viscosity: Above 15000 cps
Application Method
For reservoir and lake water clarification, PDADMAC should be selected according to raw water turbidity, algae content, suspended solids, natural organic matter, water temperature, pH value, treatment process, and required clarified water quality.
When used alone, PDADMAC 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. Dosing point and mixing speed should be carefully controlled to ensure uniform dispersion and proper floc formation. Excessive shear should be avoided after flocs are formed.
For drinking water applications, users should confirm the applicable product grade, certificate scope if required, maximum use level, and local regulatory requirements before commercial use.
Product Selection Guidance
For low turbidity reservoir or lake water, DA 201 to DA 203 or DA 401 to DA 403 can be tested first because they offer fast dispersion and stable charge neutralization.
For algae-containing water, seasonal runoff water, or raw water with difficult colloids, DA 204, DA 205, DA 404, or DA 405 may help improve floc size and settling performance.
For treatment systems requiring higher active content and lower transportation volume, 40%, 45%, or 50% liquid grades can be considered after confirming dosing system compatibility.
Final product selection should be based on turbidity removal, floc size, settling speed, clarified water quality, filter performance, dosage, and total treatment cost.
Use with PAC or Other Coagulants
PDADMAC can be used alone or together with inorganic coagulants such as PAC, alum, ACH, ferric chloride, or ferric sulfate.
PDADMAC 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, reduce residual turbidity, enhance sedimentation, and optimize total chemical consumption. The best dosing sequence and dosage should be confirmed through jar testing using actual reservoir or lake water samples.
Packaging and Storage
Bluwat PDADMAC Liquid 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 PDADMAC Liquid Polymer?
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:
FAQ
Is PDADMAC suitable for reservoir and lake water clarification?
Yes. PDADMAC can be used for reservoir water, lake water, and other surface water clarification applications. It helps remove turbidity, suspended solids, colloids, and fine particles.
How does PDADMAC clarify lake or reservoir water?
PDADMAC neutralizes the negative charge of suspended particles and colloids, helping them form larger flocs that can be removed by sedimentation, clarification, flotation, or filtration.
Can PDADMAC help with algae-containing raw water?
PDADMAC can support the removal of algae-associated particles and fine suspended solids. The treatment program should be optimized by jar testing based on actual algae concentration and water quality.
Can PDADMAC be used with PAC?
Yes. PDADMAC can be used with PAC to improve floc formation, settling speed, clarified water quality, and filter performance.
What is the CAS number of PDADMAC?
The CAS number of PDADMAC, also known as PolyDADMAC, is 26062-79-3.
What solid content is available?
Bluwat PDADMAC Liquid is available in 20%, 40%, 45%, and 50% solid content series.
Which grade is suitable for lake and reservoir water?
For low to medium turbidity water, DA 201 to DA 203 or DA 401 to DA 403 can be tested first. For difficult colloids or algae-containing water, DA 204, DA 205, DA 404, or DA 405 may be evaluated.
What dilution concentration is recommended?
When used alone, PDADMAC is commonly diluted to 0.5–5% concentration based on solid content before dosing.
How should dosage be determined?
Dosage should be determined through jar testing and plant trials based on raw water turbidity, pH, algae content, organic matter, floc size, settling speed, clarified water quality, filter performance, and treatment cost.