How is the 10% concentration of the PAC solution determined?
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How is the 10% concentration of the PAC solution determined? Of course, I think it is calculated based on the active ingredient Al2O3, after all, the dosage of the chemical is determined according to the required amount. I asked our chief engineer, and he said it is calculated based on the mass of the solid drug. I asked someone who sells chemicals (found on Taobao), and the seller said it’s 10% based on the active ingredient Al2O3. The difference between these two is too large; so let’s take a look at what configuration people actually use. Is there a solution for the other 30% of PAC? Can a turbid liquid from a regular PAC be measured using a magnetic flap level gauge? Will it get clogged?
Generally, for solutions, the concentration is expressed as mass concentration, whereas for gases it is expressed as a volume ratio； It is best not to use magnetic flap level gauges for PAC slurry ； It is recommended to use a glass tube level gauge ；
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I know it’s the mass concentration; I’m asking whether it refers to the mass concentration of PAC or that of Al2O3
Can a glass tube level gauge also output a 4-20mA signal?
When dissolving PAC reagent, it is done based on mass concentration; that is, 10% means 10 kg of PAC is dissolved in 100 kg of water. The water must be clean water, and recycled water should not be used； The maximum solubility of PAC is 23%; 30% grades are virtually absent in the market ； The PAC characteristics result in deposition, posing a risk of blockage in magnetic flap level gauges.
Then, when it’s in use, won’t the effective concentration fall short of 10%? Also, can the other 30% be prepared on one’s own?
The concentration for on-site use should be within a certain range, as different solutions have varying requirements regarding concentration. So, basically, there’s no need for too much precision.
It probably depends on whether you purchase a 10% PAC solution or prepare the PAC solution yourself using solid materials
This isn’t right; it should be 10 kg of PAC dissolved in 90 kg of water, so 10/(10+90) = 10%