Core Advantages of Polyacrylamide in Printing & Dyeing Wastewater Treatment
Release time:
Jun 15,2026


Core Advantages of Polyacrylamide in Printing & Dyeing Wastewater Treatment
Polyacrylamides (PAM), as the core flocculant for printing and dyeing wastewater treatment, achieve efficient decolorization and pollutant removal through charge neutralization, bridging adsorption, and web-sweep effects. Its cationic groups rapidly neutralize the negative charges on dye colloids, destabilizing the dispersion system; while the three-dimensional structure formed by high molecular weight chains effectively links micro-flocs, significantly enhancing sedimentation efficiency. Experimental results show that when PAM dosage is set at 1 mg/L, combined with advanced decolorizers and polyaluminum chloride (PAC) to form a synergistic system, it achieves over 85% decolorization rate, breaks through 90% COD removal, and reduces flocculation settling time by approximately 40% compared to traditional processes.
In terms of process optimization, strict control of pH within ±0.5 of 7 and staged dosing sequences are required. This approach improves supernatant transmittance to over 85%, significantly lowers treatment costs per ton of water. Compared to similar products on the market, PAM demonstrates shorter flocculation settling times under equivalent decolorization rates (shortened by 15–20%), particularly maintaining stable performance in complex water conditions such as high salinity and strong acidity/alkalinity. Practical evidence from a sewage treatment plant shows that optimized sludge moisture content drops below 65%, fully complying with China’s Textile Printing and Dyeing Industrial Water Pollutants Discharge Standard (GB 4287–2012).
Current R&D focuses on developing composite PAM products, such as nanomaterial-modified amphoteric flocculants, which boost reactive dye wastewater treatment efficiency by over 40%. The application of intelligent dosing systems increases active ingredient utilization to 95%, enabling real-time dose adjustments via online monitoring equipment. Future development will prioritize green synthesis processes and resource recycling, such as bio-based PAM produced via microbial fermentation, offering both superior performance and environmental friendliness.
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