Pre-treatment issues for reverse osmosis feed water
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This post was last edited by piter_1984 on 2014-4-4 at 16:36. Coagulants are used before the reverse osmosis multimedia and activated carbon filters; can aluminum polychloride be used instead? Is it better to use coagulants or aluminum polychloride? Help.....
This post was last edited by jereh001 on 2012-1-5 at 11:31 :o Isn’t polyaluminum chloride a flocculant? What do you mean?
Bro, polyaluminum chloride is in powder or lump form, while the flocculant is liquid. Can it be the same?
So don’t you dissolve the powder-like medication first before adding it?
I guess so, brother. Which of these two drugs is better? The other one doesn’t cause any damage to the equipment either.
Polyaluminum is also a flocculant, but its insoluble particles are larger and more numerous, making it unsuitable for desalinated water; it is generally used in wastewater treatment, and other options are preferable.
The type of chemical to be added is determined based on the water quality results. Generally, polyaluminum chloride is not suitable for use in RO systems, as it is in granular floc form and can affect the performance of the RO membrane.
Polyalumina can indeed be used in the pre-treatment of RO systems, but the dosage must be strictly controlled to prevent clogging of the RO membranes. It is recommended to use specialized flocculants for reverse osmosis.
There are two forms of polyaluminum coagulants available on the market: one is in powder form and the other is in solvent form. Generally, it is not suitable to use such coagulants in reverse osmosis feed water; in fact, it is completely unsuitable, as polyaluminum is not very stable.
I agree with what was said on floor 8. It’s not that adding it isn’t possible, but the amount added must be strictly controlled. These are polymer-based substances, and adding too much of them can easily cause clogging in the membranes
Polyaluminum is generally used in the pre-treatment of wastewater. RO is probably not suitable for this; there are specialized flocculants for RO ； However, this also needs to be determined based on the water quality; there are also specialized RO scale inhibitors available. If anything can be used indiscriminately, then what’s the point of our factory producing special chemicals for RO systems?