In sewage treatment, you can see inorganic flocculants with organic flocculants used in conjunction, mainly polyaluminum chloride and polyacrylamide with the use of such obvious benefits, one is to obtain a more desirable treatment effect, and the second is to save the dosage of PAM, the comprehensive cost and effect is better than the use of a single product.
The following are some of the precautions for the mixed use of polyaluminum chloride and polyacrylamide:
1. Dosing order: for polyaluminum chloride and polyacrylamide dosing order, need to be dosed, generally the first dosing of polyaluminum chloride, after an interval of 5-20 seconds, in the dosing of polyacrylamide, you can control the process, but do not a piece of dosing.
2. Can not be mixed: the two can not be mixed, PAC is used as a coagulant, PAM is used as a coagulant, they are two directly mixed, it is very likely that flocculation will occur, which will affect the treatment effect.
3. Addition ratio: the addition ratio of polyaluminum chloride and polyacrylamide is 10:1, i.e. adding 10 parts of PAC water solution and 1 part of PAM water solution. The dosing ratio needs to do a small test to determine the test, there is no empirical data, depending on the pollution of sewage.
4. Why mix: In order to get better flocculation effect with the cheapest cost, the reason why the two should be used together is to improve the flocculation effect, reduce the dosage, to reduce the processing cost, if it is directly mixed, it will increase the cost.