Reasons for The Failure of Polyacrylamide PAM Flocculant
The reason for the failure of polyacrylamide PAM flocculant. Polyacrylamide flocculant is often used to treat wastewater because of its adsorption bridge effect; but sometimes the flocculation effect is not obvious, and polyacrylamide cannot flocculate, which means it fails. What are there?
On the one hand, the direct factor is temperature.
When the temperature of the sewage is low, the flocculation effect of polyacrylamide will also be poor, because at low temperature, the flocculation is very slow, which makes hydrolysis more difficult; when the water temperature is low, the water viscosity is high, and the thermal movement of impurities in the sewage is reduced. Slow, the chances of contact and collision between each other are reduced, which is not conducive to mutual coagulation; the water viscosity of sewage is high, the shear force of water flow increases, and flocculation will be very slow.
The second is the pH value of the sewage.
The pH value of sewage has a great influence on polyacrylamide. Different ionic polyacrylamides have different requirements for pH value. The flocculant effect is better in a neutral environment. If the pH value is too high or too low, polyacrylamide will invalidated.
Then there is the use of the field.
When using and storing polyacrylamide on site, it is necessary to follow the method given by the manufacturer. The performance of the products produced by different manufacturers is different. If no adjustment is made, the polyacrylamide will not be able to exert a good flocculation effect. The amount of addition will increase, so it will appear as a partial failure. In addition, when dissolving polyacrylamide, the dissolution time, stirring speed, etc. will have a certain impact.
Generally speaking, there are many factors that lead to the failure of polyacrylamide flocculants, not only the above points, but also closely related to the variety, quality, dosage, uniformity of adding and mixing speed of polyacrylamide relation.