Aluminium sulfate is used as a coagulant in water treatment, but when we use it, we will find that sometimes the same amount is used, but the effect afterwards is different; this is because there are many factors that affect the effect of use, let's take a look at it together.
1. The quality factor of the coagulant itself. This includes the content of the main substances, the content of other substances, especially whether the content of the main substances has the required control pollutants; these will have a significant impact on the treated water quality. Even in tap water, which is relatively high for water treatment, it is also required that the content of arsenic does not exceed the relevant standards.
2. Water quality factors. Water quality factors have long been a very large influencing factor for sewage treatment, in which the amount of water, water temperature, and changes in pollutants in the water will affect the effect of use. Generally, this situation will occur, that is, even if the same amount and the same drug are used, different results will occur. In actual use, it is generally necessary to set up a regulating tank for pretreatment and adjustment for wastewater with large changes in quality and quantity, so that the use effect of aluminium sulfate can be affected as little as possible in the subsequent treatment.
3. Dosage. In wastewater treatment, it is not said that the more you add, the better the use effect; generally, you need to determine the approximate amount of use through a small test of the beaker, and then adjust accordingly according to the needs of water quality changes, and the dosage should be controlled as much as possible within the appropriate range of use.
4. Additives factor. In wastewater treatment, in order to make the effect better, compound alkali and lime are generally added to adjust the water quality, and sometimes a small amount of PAM is added as a coagulant, which can also improve the coagulation effect and help reduce the amount of use.
5. Stirring factor. The mixing speed and mixing time are factors in this category. Generally, when using coagulants, the stirring speed and time in the first two stages can be faster, which can also improve production efficiency, but in the sedimentation stage, the speed must be slowed down, the time must be extended, and the reaction must be delayed.
