Polyacrylamide (PAM) ≥88% — Powder Flocculant
(C₃H₅NO)ₙ
Polyacrylamide (PAM) is a water-soluble polymer flocculant, (C₃H₅NO)ₙ, CAS 9003-05-8, used to aggregate fine particles into large, fast-settling flocs. CHIMI ART supplies cationic polyacrylamide as a free-flowing powder (≥ 88% active content) in 25 kg bags for sludge dewatering and water clarification in municipal and industrial plants. Correctly prepared and dosed, it improves cake dryness, filtrate clarity and the overall chemical efficiency of the treatment line.
Product Overview
Polyacrylamide (PAM) is a water-soluble polymer flocculant, (C₃H₅NO)ₙ, CAS 9003-05-8, used to aggregate fine particles into large, fast-settling flocs. CHIMI ART supplies cationic polyacrylamide as a free-flowing powder (≥ 88% active content) in 25 kg bags for sludge dewatering and water clarification in municipal and industrial plants. Correctly prepared and dosed, it improves cake dryness, filtrate clarity and the overall chemical efficiency of the treatment line.
Technical Specifications
- Chemical Formula
- (C₃H₅NO)ₙ
- CAS Number
- 9003-05-8
- Appearance
- White powder
- Concentration
- ≥ 88% active content
- Specific Gravity
- 0.75-0.85 (bulk)
- pH Range
- 3.0-9.0 (effective range)
- Solubility
- Slow dissolving
- Available Packaging
- 25kg bags
- Shelf Life
- 24 months
- Storage Conditions
- Dry, cool place
| Property | Value |
|---|---|
| Chemical Formula | (C₃H₅NO)ₙ |
| CAS Number | 9003-05-8 |
| Appearance | White powder |
| Concentration | ≥ 88% active content |
| Specific Gravity | 0.75-0.85 (bulk) |
| pH Range | 3.0-9.0 (effective range) |
| Solubility | Slow dissolving |
| Available Packaging | 25kg bags |
| Shelf Life | 24 months |
| Storage Conditions | Dry, cool place |
Applications
Dosing Guidelines
Prepare a 0.1-0.5% stock solution by dispersing the powder slowly into agitated water and allowing 30-60 minutes for complete dissolution — undissolved gels ("fish eyes") waste polymer and can blind equipment. Typical dosing is 0.5-5 mg/L of active polymer; the correct figure for a given sludge or water is found by jar testing or small-scale dewatering trials, since sludge type, solids content and equipment all shift the optimum. Dose the matured solution through a metering pump at a point of gentle mixing, and prepare only what will be used promptly, as diluted solutions lose activity over time. Start low and increase stepwise while watching floc size, filtrate clarity and cake dryness.
How It Works
Polyacrylamide flocculates by adsorption and bridging. When the powder is dissolved and the long-chain molecules uncoil, the charged sites along the cationic backbone adsorb onto negatively charged particle surfaces — sludge solids, biological flocs, clays and organic colloids. Each extended chain attaches to many particles at once, drawing them together into large, three-dimensional flocs. In sludge dewatering this bridging action releases the water trapped between fine particles, so belt presses, centrifuges and filter presses achieve drier cake and clearer filtrate. In clarification duties the same mechanism accelerates settling and sharpens the water-solids interface. Performance depends on the polymer chains remaining intact: excessive shear during preparation or transfer breaks them and permanently reduces flocculation power, which is why gentle mixing and correct make-down matter as much as the dose itself.
Usage Tips
Store polyacrylamide powder in unopened 25 kg bags on pallets in a dry, cool warehouse; kept away from moisture and direct sunlight it has a 24-month shelf life. The powder is hygroscopic — reseal opened bags tightly, because absorbed humidity causes caking and poor dissolution. Never handle the powder or its solutions near uncontained water on walkways: wet PAM is extremely slippery, and spilled powder should be swept up dry, not hosed down. Use dust control and a suitable mask when charging make-down tanks, plus gloves and eye protection. See the safety data sheet for complete guidance.
Certifications & Compliance
Frequently Asked Questions
What is the difference between cationic, anionic, and nonionic PAM?
Cationic PAM works best with negatively charged particles (most wastewater), anionic PAM suits positively charged particles, and nonionic PAM is used for specific applications. Our PAM is cationic, optimized for municipal and industrial sludge dewatering.
How long does prepared PAM solution remain effective?
Prepare PAM solutions fresh daily for best results. Diluted solutions begin degrading within 24-48 hours due to polymer chain breakage. Always prepare only the amount needed for immediate use.
What mixing speed should be used when preparing PAM solutions?
Use gentle mixing (50-150 RPM) to avoid shearing polymer chains. High-speed mixing permanently damages the polymer and reduces effectiveness. Allow 30-60 minutes dissolution time with slow agitation.
Can PAM be overdosed, and what happens if it is?
Yes, overdosing PAM can restabilize particles and worsen performance. Signs include poor floc formation, increased turbidity, and higher polymer consumption. Always start with low doses and gradually increase while monitoring performance.
What factors affect PAM performance in dewatering applications?
Key factors include sludge characteristics (organic content, particle size), mixing intensity, contact time, and equipment type. Conduct small-scale tests to optimize polymer type, dose, and application method for your specific sludge.
How should polyacrylamide powder be stored in the warehouse?
Keep the 25 kg bags sealed on pallets in a dry, cool store away from moisture and direct sunlight; shelf life is 24 months. The powder is hygroscopic and cakes if bags are left open. Sweep spills up dry — wet PAM is extremely slippery — and use dust control when charging make-down tanks.
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