Paper Industry Wastewater Decoloring Agent: Dicyandiamide Formaldehyde Resin by Yixing Cleanwater Chemicals

Founded in 1985 and headquartered in Yixing, Jiangsu Province—approximately 200 kilometers from Shanghai—Yixing Cleanwater Chemicals Co., Ltd. brings over four decades of expertise to the global water treatment industry. The company specializes in the research, development, and supply of high-performance chemicals for industrial wastewater and urban sewage treatment. Its comprehensive product portfolio includes water decoloring agents, polyaluminum chloride (PAC), polyacrylamide (PAM), poly(diallyldimethylammonium chloride) (pDADMAC), polyamine, and a full range of organic flocculants and inorganic coagulants. Each product is engineered to deliver strong decolorization and effective removal of COD and BOD across multiple industrial sectors.

Among the company's flagship offerings is its dicyandiamide formaldehyde resin-based decoloring agent, specifically formulated to address the complex color challenges of paper industry wastewater. Paper mill effluents—from mechanical pulping, chemical pulping, bleaching, and paper machine white water circuits—contain lignin derivatives, tannins, and synthetic dyes that impart intense coloration and high organic loads. Conventional treatment methods often struggle to meet tightening discharge standards. Yixing Cleanwater's dicyandiamide formaldehyde resin decoloring agent functions as a quaternary ammonium cationic polymer that rapidly neutralizes negatively charged color bodies and colloidal particles, forming dense, fast-settling flocs for efficient separation.

• 40 Years of Industry Experience: Since 1985, Yixing Cleanwater has accumulated deep knowledge of water chemistry and treatment processes, serving customers across Asia, Europe, the Americas, and beyond.
• Strong Decolorization and COD/BOD Removal: The dicyandiamide formaldehyde resin chemistry delivers powerful decolorization while simultaneously reducing COD and BOD levels, helping paper mills meet both color and organic discharge limits in a single treatment step.
• Comprehensive Product Range: As a full-line supplier of both organic polymers and inorganic coagulants, the company provides integrated chemical solutions—including decoloring agents, PAC, PAM, pDADMAC, and polyamine—that can be optimized as synergistic treatment packages for maximum cost-performance.
• Strategic Location: Situated in Yixing, Jiangsu Province, approximately 200 km from Shanghai, the company benefits from excellent logistics infrastructure for reliable export shipping to global markets.
• Application Versatility: Products are proven across textile, dyeing, paper-making, printing, mining, ink, and urban sewage treatment facilities, demonstrating consistent performance in diverse wastewater matrices.

• Pulping Effluent: Removes dark-colored lignin and tannin compounds from chemical and mechanical pulping operations.
• Bleaching Wastewater: Treats filtrates from chlorine dioxide, hydrogen peroxide, and oxygen bleaching stages containing oxidized chromophoric compounds.
• Paper Machine White Water: Clarifies white water circuits for reuse, reducing freshwater consumption and fiber loss.
• Deinking Effluent: Removes residual ink pigments and color bodies from recycled fiber processing.
• Integrated Mill Final Effluent: Serves as a polishing treatment step to ensure compliance with regional discharge color standards.

Yixing Cleanwater Chemicals is committed to delivering consistent product quality, reliable supply, and responsive technical support to customers worldwide. The company's technical team provides application guidance including jar testing protocols, dosing optimization, and system integration recommendations to ensure each customer achieves optimal treatment outcomes. With a manufacturing heritage spanning four decades and a strategic location near one of the world's largest ports, Yixing Cleanwater is well-positioned to serve the growing demand for high-performance water treatment chemicals in Europe, North America, and beyond.

For product specifications, technical consultations, sample requests, or to discuss custom formulations, please contact Yixing Cleanwater Chemicals Co., Ltd. Our team is ready to support your paper industry wastewater treatment needs with proven solutions backed by 40 years of expertise.