How to apply polyacrylamide in urban sewage treatment? To understand this, we need to know how the urban sewage treatment system works. At present, there are generally three levels of urban sewage treatment process, so how to use polyacrylamide in these three levels of treatment process?

Anionic polyacrylamide and cationic polyacrylamide are commonly used in urban sewage treatment, and the use of these polyacrylamide is different.

The primary treatment technology of urban sewage is mainly biological and chemical methods, and anionic polyacrylamide is generally used in this process. After biochemical treatment, polyacrylamide is added into the secondary sedimentation tank to remove various harmful pollutants in the sewage by coagulation. The secondary treatment of urban sewage generally reaches the discharge standard through physical filtration.

The three-stage treatment technology of urban sewage is to add polyacrylamide into the sediment to dewater the sludge, and use the organic sludge for landfill, composting, etc. the polyacrylamide used at this time is generally cationic polyacrylamide.

What should be paid attention to when using polyacrylamide in the process of urban sewage treatment? First of all, the higher the concentration of sewage, the greater the amount of polyacrylamide used. According to the difference of treatment process, select the appropriate molecular weight of polyacrylamide. Before using polyacrylamide, it must be selected through experiments.