The Difference Between Polyacrylamide Used for Dewatering and Flocculation

Polyacrylamide (PAM) is used in municipal and industrial wastewater treatment, primarily categorized into anionic, cationic, and nonionic types. Anionic and cationic varieties are most commonly employed in daily applications. Within the water treatment industry, many clients struggle to differentiate between the dewatering and flocculation properties of polyacrylamide. Below is a brief explanation of the functional distinctions corresponding to different PAM grades. Cationic polyacrylamide (CPAM) is generally used for sludge dewatering. CPAM features a high density of positive charges on its macromolecular chains and excellent water solubility. Water treatment plant sludge consists of highly hydrophilic colloids containing water that is extremely difficult to remove. Using CPAM enables the sludge colloidal segments to adsorb onto different particles, promoting particle aggregation and achieving effective sludge-water separation for superior dewatering results. Compared to CPAM, anionic polyacrylamide (APAM) typically has a higher molecular weight and poorer water solubility. Its molecules exhibit greater extension in water, providing excellent particle entrapment and bridging functions. This enlarges and thickens the flocculation structure, effectively treating suspended solids or heavy metal ions for sedimentation separation and achieving flocculation. Polyacrylamide Sewage Treatment Process Flow Due to variations in effluent characteristics and sludge properties across different water treatment plants, specific application depends on the sludge’s charge type. Cationic polyacrylamide is typically used for sludge dewatering, while anionic polyacrylamide is employed for wastewater flocculation. Polyacrylamide (PAM) also comes in different molecular weights. Generally, distinct PAM types are required for different wastewater treatment applications, necessitating experimental determination. The main products of flocculant manufacturer Xinhuan Water Treatment are: White polyaluminium chloride (food grade), drinking grade polyaluminium chloride, industrial grade polyaluminium chloride, anionic polyacrylamide, cationic polyacrylamide, nonionic polyacrylamide, petroleum recycling polyacrylamide, oil recovery polyacrylamide, polyacrylamide, polymer flocculant polymer flocculation coagulant, polymeric ferrous sulphate, polymerized iron and aluminium chloride, and other water treatment chemicals. Welcome customers to write to us to negotiate business! Tel/WhatsApp：86 19139972558 Email：Sunny@xhwtm.com Contact:Sunny