The dosage of polyaluminium chloride(PAC) is very important. Controlling the dosage well can achieve many advantages such as good use effect, small dosage and low cost. Some customers are very careless in use. Add one bag to see if it works. If not, add one more bag. This is very wrong. It is easy to cause excessive or insufficient use of polyaluminum chloride, The correct way to cause unqualified effluent is to buy back a batch of polyaluminium chloride, take an appropriate amount of sewage, make a small test with the prepared polyaluminium chloride liquid, calculate the dosage through the small test, and then add it according to the obtained dosage, which can not only save the dosage of polyaluminium chloride, but also ensure the qualified sewage discharge, Therefore, controlling the dosage of polyaluminium chloride is the key in the use process.
Basically, a small sample should be made every time polyaluminum chloride is purchased. Although it is the goods of the same manufacturer, the content is a little different, and the dosage will change accordingly.
There are several kinds of polyaluminium chloride: basic polyaluminum chloride, spray drying polyaluminium chloride, polyaluminum ferric chloride, polyaluminium chloride, 26 content polyaluminium chloride, 28 content polyaluminum chloride, 30 content polyaluminum chloride, etc. according to the situation of sewage, industrial sewage, drinking water, domestic water, printing and dyeing wastewater and so on, and different sewage can choose suitable polyaluminum chloride. It can get twice the result with half the effort!
In practical application, different water temperature, pH value and impurities in the same sewage institution can affect the dosage and delivery effect of polyaluminium chloride. How to achieve good results is inseparable from regular small samples and small experiments from time to time to determine the new dosage and ensure the effect.