The amount of polyacrylamide used to treat one ton of sewage
Different industries require different amounts of flocculant for sewage. Under normal circumstances, to treat one ton of sewage, the dosage of flocculant is 2-6 grams. If the ss content in the sewage is low, the dosage is about 1 gram. Of course, there are also wastewater with higher ss content, so the dosage may exceed 10 grams, therefore, the specific amount used depends on the specific conditions of the sewage.In terms of application, anionic polyacrylamide is generally used as a flocculant in wastewater treatment or for thickening, and cations are generally used for sludge dewatering in the later stage.
What concentration of aqueous solution should be formulated?
Anionic polyacrylamide is generally formulated as a one-thousandth, that is, about 0.1% aqueous solution, and cationic polyacrylamide can be formulated at 0.1% to 0.4%.
What problems should be paid attention to when preparing aqueous solutions?
When preparing the solution, add water to the dissolving tank/dissolving tank first, and then turn on the mixer. When the mixing blade is buried in water, add polyacrylamide slowly along the vortex. Do not put a large amount of PAM quickly at once, otherwise PAM will Agglomerate, and affect its use effect.
How long should the flocculant solution be stirred for?
After the addition of PAM, it should generally continue to stir for more than 30 minutes, generally around 50 minutes, it can be used, some PAM will be difficult to dissolve in winter, it is recommended to extend the stirring time to ensure that it is fully dissolved.
How long does the prepared aqueous polyacrylamide solution fail?
The dissolved PAM should be used as soon as possible. Generally, the anionic type should not exceed 36 hours. The cationic type is easily hydrolyzed after dissolution, and should be used within 24 hours.
The polyacrylamide of the water emulsion is a form of polyacrylamide liquid, which has the characteristics of a solid flocculant. The polar groups in the molecular chain absorb the suspended solid particles in the water, so that the particles are bridged or electrically neutralized. Of flocs. In addition to its own advantages of polyacrylamide dry powder, it also has high charge density options, fast dissolution, low energy consumption, storage and use, a wider range of applicable pH values, higher charge stability, and better flocculation effect Good, it is convenient for workers to dissolve, and it reduces a lot of unnecessary troubles for workers. The biggest advantage is that the amount of medicine used is small, which can save a lot of costs, which is about 20% to 30% less than the cost of using dry powder. The best choice for sewage treatment plants and large paper mills.