Can polyacrylamide and polyaluminum chloride be used at the same time?
Can polyacrylamide and polyaluminium chloride be used at the same time? Zhengda tells you that in the case of sewage treatment, some sewage, the use of a single flocculant is not effective, it must be used in combination. Inorganic flocculant PAC and polyacrylamide composite flocculant will achieve better results in the treatment of sewage, but the order should be paid attention to when adding the agent, the order is not correct, and the effect is not achieved.
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I believe that everyone knows the answer here. When using the composite flocculant, you must pay attention to the order of addition and the time interval! The combination of PAC and PAM is to let the PAC complete the neutralization charge/colloid destabilization to form fine flocs, and further increase the floc volume to facilitate sufficient precipitation. Since the reaction time of the polyaluminum chloride PAC is very short, strong mixing is required after the addition, the PAM action time is long, and the mixing attention is strong first and then weakly - the first is strong to mix evenly and weakly to avoid destroying the flocs! Polyacrylamide is a flocculant. Polyaluminium chloride is a coagulant. Under normal circumstances, coagulant is added first and polyacrylamide is added. However, for the sake of safety, it is recommended that you determine the order of addition through experimental results! Dosing point, dosing amount, dosing time and mixing intensity need to be determined experimentally. Remember to never use them together, otherwise it will affect the effect and increase the cost of use.
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It has been proved that polyacrylamide can be used simultaneously in the polymerization of aluminum chloride, and such use will have a more effective effect.
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