How do cationic polyacrylamide select ion models when treating wastewater?
Why is cationic polyacrylamide in the treatment of sewage when the choice of ion model is the key? Because the industrial production of sewage sludge business units there are many different nature of the industry selection of different ion models, should be based on the nature of water quality conclusions. What factors should be considered when choosing the exact cationic polyacrylamide key?
a, sludge is the inevitable product of sewage treatment, first of all we should understand the source of sludge, nature, composition and solid content. According to the sludge contains the main components of different sludge can be divided into organic sludge and inorganic sludge. In general, cationic polyacrylamide for the treatment of organic sludge, anionic polyacrylamide for the treatment of inorganic sludge, alkaline is very easy to use cationic polyacrylamide, and acidity is not strong when using anionic polyacrylamide, pollution When the solid content of mud is high, the amount of polyacrylamide is usually large.
b, cationic polyacrylamide ionization options: for the dewatering of the sludge, can be different degrees of flocculant through a small experiment to filter, select the best suitable polyacrylamide, so that you can get the best flocculant effect , But also to minimize the amount of drugs, cost savings. Select the degree of the key to see the size of floc floc strength (moisture content)
The size of the floc: floc too small will affect the speed of drainage, floc too will make the flocs to bind more water and reduce the mud cake dryness. The size of the floc can be adjusted by selecting the molecular weight of the polyacrylamide.
The strength of the floc: the flocs should be stable without breaking under shear. Increasing the molecular weight of polyacrylamide or selecting the appropriate molecular structure can improve the stability of floc.
c, polyacrylamide and sludge mixture: polyacrylamide in a certain position of the dehydration equipment and sludge must be fully reacted, the occurrence of flocculation. To this end, the viscosity of polyacrylamide solution must be appropriate, in the existing equipment conditions can be fully mixed with the sludge, the two mixed even if it is a key factor in success. The viscosity of cationic polyacrylamide solution is related to its molecular weight and formulation concentration.
d, cationic polyacrylamide dissolved: dissolved in order to play a full play flocculation. Sometimes need to speed up the dissolution rate, then consider increasing the concentration of polyacrylamide solution.
Because the production cost of PAM itself is high, for the water treatment industry applications also greatly improve the use of cost. But the product of the amount of less, high efficiency, can quickly show the effect, can help customers improve the efficiency of sludge treatment and can reduce their application costs. So the choice of cationic polyacrylamide ion model is the key.