There are many customers in the water treatment industry in Southeast Asian countries. Because the above countries are located in tropical rain forest climate zone or tropical monsoon climate zone, with more rain and humid air, if the polyacrylamide purchased by some water treatment plants is piled up for a long time or the packing port is not tightly tied, resulting in the moisture absorption and caking of powdered polyacrylamide, some customers will doubt whether such polyacrylamide is still working? In addition, the shelf life of polyacrylamide is generally 2 years, beyond the shelf life there is also the risk of failure. Can polyacrylamide continue to be used due to poor storage or beyond the shelf life?

In this case, the failure of polyacrylamide can be judged from two aspects, one is whether the viscosity of polyacrylamide solution decreases, the other is whether the flocculation effect becomes worse. Therefore, if the polyacrylamide absorbs moisture and agglomerates, clean water with higher temperature can be used to dissolve it (polyacrylamide absorbing moisture and agglomerates is difficult to dissolve with low temperature water). If the water solution has viscosity, it means that the polyacrylamide is not invalid. Polyacrylamide beyond the shelf life can be used in water sample test. If the flocculation effect is not reduced, polyacrylamide can still be used.

Although the above methods can detect whether polyacrylamide is effective under unconventional conditions, Gongyi Filter Industry Co.,Ltd still suggests that the water treatment plant should pay attention to moisture-proof, rain proof and avoid sun exposure when storing polyacrylamide.