Polyacrylamide flocculants are very effective in sludge dewatering and sewage settling. Some customers report that the polyacrylamide pam used in sludge dewatering will encounter such and other problems. Today, I will analyze several common problems for everyone. :
1. The flocculation effect of polyacrylamide is not good, and what is the reason why it can not be pressed into sludge? If the flocculation effect is not good, we must first eliminate the quality problems of the flocculant product itself, whether the cationic polyacrylamide meets the ionic molecular weight standard, and the sludge dewatering effect of the product that does not meet the standard It’s definitely not good. In this case, replacing the PAM with a suitable ion level can solve the problem.
2. What should I do if the amount of polyacrylamide is too large?
A large amount means that the index content of the product is not enough, and there is a gap between the indexes needed for polyacrylamide and sludge flocculation. At this time, you need to select the type again, select the appropriate PAM model and addition amount to test, and get a more economical use. cost. Generally, it is recommended that the dissolved concentration of polyacrylamide is one-thousandth to two-thousandths, and a small test selection is carried out according to this concentration, and the results obtained are more reasonable.
3.What should I do if the viscosity of the sludge after using polyacrylamide in sludge dewatering is high?
This situation is due to the excessive addition of polyacrylamide or the improper product and sludge. If the viscosity of the sludge decreases after reducing the addition amount, then it is a problem of the addition amount. If the addition amount is reduced, the effect is not achieved and the sludge cannot be pressed, then it is a problem of product selection.
4. Polyacrylamide is added to the sludge, and the water content of the subsequent mud cake is too high, what should I do if the mud cake is not dry enough?
In this case, first check the dehydration equipment. The belt machine should check whether the stretch of the filter cloth is insufficient, the filter cloth’s water permeability and whether the filter cloth needs to be replaced; the plate and frame filter press needs to check whether the filter pressure time is sufficient, Whether the pressure of the filter is appropriate; the centrifuge needs to check whether the selection of the dehydrating agent is appropriate. Stacked screw and decanter dehydration equipment focus on checking whether the molecular weight of polyacrylamide is too high, and products with too high viscosity are not conducive to pressing mud!
There are still many common problems of polyacrylamide in sludge dewatering. The above are the more common problems and solutions summarized in a large number of on-site debugging. If you have questions about cationic polyacrylamide sludge pressing or sedimentation, all You can send an email to us, let’s discuss the use of polyacrylamide in sludge dewatering!
Reprinted from the original Qingyuan Wan Muchun.
Post time: Oct-20-2021