The three important indexes of polyacrylamide are molecular weight, hydrolysis degree, and solid content. There are three main indicators of cationic polyacrylamide: ionicity, solid content and molecular weight. The molecular weight of anion polyacrylamide is from 6 million to 22 million, and the cationic polyacrylamide ionicity is from 20 percent to 60 percent. Recently, a number of customers in different fields have reported that adding polyacrylamide is not very effective. Water purification materials for rivers suggest that corresponding anion or cationic products should be selected according to on-site sewage treatment process and equipment.
Then, why the effluent treatment of polyacrylamide PAM fails to achieve the effect mentioned by the manufacturer? The reasons are analyzed along with the source water purification material：
1. Dissolution time: after polyacrylamide dissolves into liquid, it should be used as soon as possible. With the increase of storage time, the agent will degrade with time, and the lower the liquid viscosity, the more influence the sewage treatment effect will be. In general, polyacrylamide liquids can be stored for about 1-2 days. And the solid polyacrylamide storage time is longer, in general, customers are recommended to use polyacrylamide water solution now.
Ratio of 2, temperature influence: polyacrylamide liquid, the temperature reaches 60 ℃ began to slow degradation, 22 million molecular weight of anionic flocculant in high temperature reaches a certain degradation to around $5 million, or even destroy the molecular chain structure, effect use effect with the increase of temperature, the degradation of faster and faster.
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