In sewage treatment, the effect of using a water purification agent alone is often unattainable. In practical applications, polyaluminum chloride and polyacrylamide are used in combination, and they are rarely used alone.
When we use polyaluminum chloride alone, although clumps of flocculates can be seen in the water, these flocculates settle very slowly. They will float on the upper layer of the pool and drift with the current, making the water turbid state. Therefore, the effect of using polyaluminum chloride alone is very unsatisfactory.
Polyacrylamide plays the role of flocculation and precipitation in water treatment. When used alone, if the pH value of the water quality is between 6-9, polyacrylamide can quickly treat the wastewater in most cases. If the pH value of the water quality is not within this range, and the water quality is more complex, the treatment effect of polyacrylamide may not be ideal.
The role of polyaluminum chloride in water treatment can be summarized as two points. One is that the PH value of the water quality can be adjusted to reach 6-9, so that the PH value can meet the water quality requirements of subsequent use of polyacrylamide and other agents; the second is that it can play a role in coagulation. After the wastewater is added to polyaluminum chloride, flocculent groups will appear in the water. After that, if you add polyacrylamide and other flocculants, these flocculent groups can be quickly glued together, clumped together, and quickly precipitated.
Polymersco reminds you: When using, polyaluminum chloride and polyacrylamide should be dissolved and added separately. First add the polyaluminum chloride solution, and then add the polyacrylamide solution. This method of adding is not only the best effect, but also the most economical amount. Do not mix these two agents together to dissolve when dissolving, this will cause them to react and reduce the efficacy of later use.
