Polyacrylamide (PAM) is a high molecular polymer widely used in sewage treatment. Due to its excellent flocculation and thickening properties, it has become an important auxiliary agent in the sewage treatment industry. In different types of sewage treatment, it is very important to choose the right polyacrylamide product. This article will introduce in detail the selection principles and applications of polyacrylamide in sewage treatment.
1. Basic characteristics of polyacrylamide
Polyacrylamide is a water-soluble polymer compound with good flocculation, thickening, sedimentation and filtration properties. According to its molecular structure, polyacrylamide can be divided into three types: cationic, anionic and non-ionic. Different types of polyacrylamide have different application effects in sewage treatment.
2. Types of sewage treatment and selection of polyacrylamide
1. Municipal wastewater treatment
Municipal sewage usually contains a large amount of organic matter and suspended solids, which is suitable for the use of anionic polyacrylamide. Anionic polyacrylamide can effectively combine with cationic substances in sewage to form larger flocs, thereby increasing the sedimentation rate and reducing sewage treatment time.
2. Industrial wastewater treatment
Industrial wastewater has complex components and may contain pollutants such as heavy metals and grease. For industrial wastewater containing more cationic substances, it is recommended to use cationic polyacrylamide. Cationic polyacrylamide can react with these cationic substances to form stable floccules and improve the treatment effect.
3. Aquaculture wastewater treatment
Aquaculture wastewater contains a large amount of organic matter and suspended solids, which are usually treated with anionic polyacrylamide. Its excellent flocculation performance can effectively remove suspended solids in water, reduce water turbidity, and improve water quality.
4. Mine wastewater treatment
Mine wastewater often contains a large amount of fine particles and heavy metal ions. Non-ionic polyacrylamide can be used for treatment. Non-ionic polyacrylamide will not react with metal ions during the treatment process, and can effectively remove suspended matter to achieve good treatment results.
3. Precautions for using polyacrylamide
When using polyacrylamide, you need to pay attention to the following points:
1. Preparation concentration: The concentration of polyacrylamide should be adjusted according to the specific conditions of the sewage. Too high or too low concentration will affect the treatment effect.
2. Dosing method: Polyacrylamide can be added directly or pre-mixed. The specific method should be selected according to the type of sewage treatment equipment and process requirements.
3. Stirring speed: After adding polyacrylamide, an appropriate stirring speed should be maintained to ensure that it is fully dissolved and in full contact with the suspended matter in the sewage.
4. Storage Conditions: Polyacrylamide should be stored in a cool, dry environment, away from direct sunlight and high temperature to maintain its stable performance.
4. Conclusion
Polyacrylamide is widely used in sewage treatment, but different types of sewage require different types of polyacrylamide. By understanding the composition and characteristics of sewage and rationally selecting the type and method of use of polyacrylamide, the efficiency and effect of sewage treatment can be significantly improved. I hope this article can provide you with reference and help in choosing the right polyacrylamide in the sewage treatment process.
Post time: Jul-23-2025