When polyacrylamide and polyaluminum chloride are directly mixed, the flocculation reaction is very likely. Generally speaking, PAC is used as a coagulant during use, and PAM is used as a coagulant. They are two A direct mixing, then most likely flocculation reaction, that is, one as a substrate, a flocculant, it will affect the treatment effect.To the two used in conjunction, in order to improve the flocculation effect, reduce the amount of treatment to reduce Cost, if directly mixed, will increase the cost of use.PAC and PAM for the order of addition, this should be through a small pilot test to decide, there will be a difference between organic and inorganic, hydrophobic and hydrophilic there are differences. Dosing interval, only less than 5s, the general proposal is 20s, you can control in the process .PAC solution is generally brown or brown solution, almost no sticky, while the PAM solution is colorless and transparent viscous jelly Liquid, like the use of liquid glue, the glass rod is generally placed inside, take out to drawing