PAC polyaluminum chloride is commonly used in sewage treatment. The most important role is achieved in physical processes such as coagulation, sedimentation, and adsorption. Therefore, if the product has problems in use and does not precipitate, it will lead to the loss of use of polyaluminum chloride. Today, we will see the reasons why the product does not precipitate and has no effect!
1. Impact of PH value: PAC polyaluminum chloride can react only within the PH value of 6-9. Under normal circumstances, only a small part of the water is slightly acidic or alkaline. What should we do in this case? Then we can find ways to neutralize the water quality, such as adding lime, flake alkali, hydrochloric acid, ferric sulfate, etc. until the water quality is adjusted to the PH value of 6-9.
2. The water temperature is low and the water turbidity is low. It is difficult for conventional PAC polyaluminium chloride to react in these two situations. How can we solve this problem? We can choose spray polyaluminum chloride, which has a low base degree and has a good effect against the above two situations.
3. As for the dosing amount, we should pay attention here. In fact, it is not true that the greater the dosage is, the better the effect will be. This concept is wrong. No matter what sewage is, there will be a standard dosage in the actual situation. If it is too large or too small, it will cause no sedimentation and no flocculation. Before dosing, we should make a small trial comparison and calculate the dosage.
4. Product quality. The core of sewage treatment is to flocculate the suspended solids and impurities in the water. When using low-quality or unqualified reagents, the flocculation is slow, there are many insoluble substances, the alum flowers are small, and there is no sedimentation. It is recommended to choose products with content up to standard and quality guaranteed. When purchasing, do not choose products for cheap, which will affect the production, and the gain is not worth the loss.
In case of poor or ineffective use of polyaluminum chloride, don't worry. Check one by one according to the above method to find out the problem and solve it. If it hasn't been solved, leave a message below and let's discuss the solution together!
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