Different types of HENGFENG polyacrylamide (PAM) are more effective for treating different types of river and lake wastewater. The following is an introduction based on the characteristics of the wastewater:

HENGFENG Anionic PAM suitable for wastewater with high turbidity and high negative charge: Anionic PAM has a large number of negative charges on its molecular chain. It is suitable for treating river and lake wastewater containing a large number of fine - grained suspended solids with a negative charge, such as clay particles. Through the action of electrostatic attraction and bridging, anionic PAM can make the suspended particles aggregate into large flocs, which is conducive to sedimentation and filtration, and can significantly reduce the turbidity of the wastewater. Effective for high - alkalinity wastewater: In alkaline wastewater, the ionization degree of anionic PAM is enhanced, and its negative charge density increases, which can better interact with positively charged substances in the wastewater. Therefore, it is often used to treat river and lake wastewater with a high pH value. For example, in some industrial - contaminated rivers and lakes where the wastewater has a high alkalinity due to the discharge of alkaline substances, anionic PAM can play a good role in flocculation and sedimentation.

HENGFENG Cationic PAM Ideal for wastewater with high organic matter content: Cationic PAM has positive charges on its molecular chain and can effectively adsorb and flocculate organic pollutants with negative charges in the wastewater, such as proteins, humic acids, and some industrial organic dyes. In rivers and lakes polluted by domestic sewage and industrial organic wastewater, cationic PAM can significantly remove organic matter, reduce the chemical oxygen demand (COD) and biochemical oxygen demand (BOD) of the wastewater, and improve the water quality. Good for sludge dewatering: In the process of treating river and lake wastewater, a certain amount of sludge is often produced. Cationic PAM is widely used in sludge dewatering. It can neutralize the negative charge on the surface of sludge particles, compress the double - electric layer, and make the sludge particles aggregate and precipitate. This helps to improve the dewatering performance of the sludge, reduce the water content of the sludge, and facilitate the subsequent treatment and disposal of the sludge.

HENGFENG Non - ionic PAM Suitable for slightly acidic to neutral wastewater: Non - ionic PAM has no obvious charge on its molecular chain and is mainly adsorbed and flocculated by physical entanglement and hydrogen bonding. It is suitable for treating river and lake wastewater with a pH value ranging from slightly acidic to neutral. In some natural rivers and lakes where the water quality is relatively stable and the pH value is close to neutral, non - ionic PAM can achieve good treatment results. Effective for low - turbidity wastewater: For river and lake wastewater with low turbidity and a small amount of suspended solids, non - ionic PAM can play a role in fine - tuning and stabilizing the flocculation effect. It can adsorb and bridge the small - amount suspended particles in the water to prevent the particles from redispersing, thereby improving the clarity of the water. In addition, there are also some modified PAMs, such as amphoteric PAM, which has both cationic and anionic groups on the molecular chain.

HENGFENG Amphoteric PAM can adapt to more complex wastewater environments and has better treatment effects in some special - case river and lake wastewater treatment, such as wastewater with a changing pH value or containing a variety of different charged pollutants.