What flocculant is suitable for highly alkaline sewage?

When dealing with highly alkaline wastewater, it is necessary to select chemicals that can maintain stability and flocculation efficiency in a high pH environment. The following categories are more suitable: Cationic polyacrylamide (PAM): It performs excellently in a wide pH range (including strong alkalinity), capable of adsorbing negatively charged sewage particles through charge neutralization, promoting flocculation and sedimentation, and is widely applicable and highly efficient. Polyaluminium Chloride (PAC): Although commonly used in neutral or slightly acidic environments, it can be adapted to alkaline wastewater after proper adjustment (such as with pH regulators). With its strong charge neutralizing ability, it forms large flocs that settle quickly, making it suitable for treating alkaline wastewater with high suspended solids content. Iron salt flocculants, such as ferric chloride and ferrous sulfate, are prone to generating hydroxide colloids under alkaline conditions, demonstrating outstanding removal effects on pollutants such as phosphorus and heavy metals. However, it should be noted that iron salts may impart a slight color to the water body, necessitating careful selection based on effluent requirements. Natural/biological flocculants: environmentally friendly agents such as chitosan and starch derivatives exhibit good stability in alkaline environments, making them suitable for scenarios with high environmental protection requirements, and they do not introduce secondary pollution. In practical applications, single agents or compound formulations can be selected based on the types of pollutants in the wastewater (such as suspended solids, colloids, and specific ions) and the requirements for treated water quality, in order to optimize the flocculation effect. 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