Clarify whether polyacrylamide and polyaluminum chloride can be used together in the clarification tank.
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The flocculant used in the unit’s clarification tank is polyacrylamide, an organic flocculant. Given that its composition is simple and thus its flocculation effect is limited, it is uncertain whether it would be feasible to add aluminum chloride separately to enhance the flocculation effect. Will the two affect each other in the clarification tank, and is it available from manufacturers?
I use two types of agents here as well, but not simultaneously; I’m not sure if they can be mixed together – theoretical support is needed. I hope fellow sailors can help
Well, by adding them at different times, this avoids mutual interference. If the two are used together, the flocculation effect will be **improved, and it will also play a positive role in stabilizing the system. I would be very grateful if experienced users could share their insights.
Polyaluminum chloride is generally used as a flocculant for raw water purification, while acrylamide is used as a co-flocculant; the two are also used together. Therefore, it can be applied at the source of water in the entire plant, and it is especially suitable for use in the black water from gasification processes. However, it is essential to avoid introducing too much of it into the graywater system, as this would reduce the effectiveness of the dispersants and lead to gray precipitates that cause scaling.
They can be used together, and the flocculation effect is better than that achieved with a single flocculant; some manufacturers use them, but I won’t mention their names
What is the basis for determining the amount to use? Is it based on the amount of flocculant used, or is it calculated separately? Also, could you please provide detailed information on whether they are used alternately or simultaneously?
They cannot be used together; it’s clear from their principles.
Polyacrylamide (PAM) is a water-soluble polymer, while polyaluminum chloride is a water purification material and an inorganic polymer coagulant; it is also referred to as polyalumina, with the English abbreviation PAC. These substances are dissolved in separate tanks and then pumped into the sewage tank using metering pumps
I’m responsible enough to tell you: they cannot be used together! Polyaluminum chloride should be added first, and after thorough mixing, polyacrylamide should be added. The interval between adding these two chemicals is generally 5 to 10 minutes, depending on the results of the pilot tests