The Flocculation Principle of Amphoteric Flocculants

1. What are amphoteric flocculants?

Amphoteric flocculants can not only remove suspended solids and colloids in the wastewater, but also remove substances beyond the reach of general flocculants— the dissolved substances in the wastewater (such as colored substances, humic acids and surfactants, etc.).

2. The flocculation principle of amphoteric flocculants

Amphoteric polyacrylamide is the main flocculant in amphoteric flocculants. It contains anions and cations. Anionic and cationic groups can complexate (chelate) with chroma substances, humic acids and surfactants. Then, the purpose of purification is achieved by flocculation and sedimentation. The cations in them can capture the organic suspended solids with negative charges, and the appropriate amount of anionic units and neutral units can promote the settling of inorganic suspended solids and act as flocculating agents. Therefore, amphoteric flocculants play an active role in the treatment of printing and dyeing wastewater, micro polluted water supply and true soluble organic matter removal.

Amphoteric flocculants have high molecular weight, easy control of anion and cation degree, good solubility and strong salt resistance, so it has a very important application prospect in water treatment, papermaking, oil extraction and other fields.

Amphoteric flocculants of Beijing Sinofloc Chemical Co.,Ltd. is widely used as coating agents in the oilfield industry, sludge thickening and sludge dewatering agents in municipal and industrial wastewater treatment.