Water Treatment "Part 25": How Can Membrane Fouling Be Prevented?

in #hive-196387last year

Methods for reducing the phenomena of membrane pore clogging:

By eliminating those elements that contribute to pore clogging before membrane filtration or by preventing it while it is occurring in the filtration medium, this problem can be avoided. The second technique involves modifying the operational circumstances. In a moment of primary treatment, it might occur in one of the following areas:

  • Removing the iron helps prevent its precipitation on the membrane surface when it is oxidised inside the aqueous medium.
  • Putting natural organic molecules through a process of agglomeration because agglomerations don't block pores as much as colloids do.
  • Incorporate an anti-calc agent to stop salts from building up on the membrane's surface.
  • Shifting the pH value to make salts' solubility balance go in the opposite way of how it precipitates.
  • Prefiltration on a sand filter, and in rare circumstances, a membrane prefilter.


Membrane Fouling

The strategy for mitigating the phenomenon of blockage is based on reducing the filtration speed, working with less pressure, or controlling the flow inside the filter so that the phenomenon of sediment accumulation on the surface of the membrane is reduced, and thus the rate of pore blockage is reduced. And when it comes to lessening the biocenosis phenomena on the membrane's surface, sterilisation might be used sometimes.

Washing technique:

The washing procedure seeks to extend the life of the membrane by removing materials that have been accumulated on it or inside its pores. When the treated water's flow velocity hits its lowest limit value, the pressure reaches its maximum limit, or the filtration system's allowed filtration duration is achieved, the washing process begins.

References:

Sort:  

Thanks for your contribution to the STEMsocial community. Feel free to join us on discord to get to know the rest of us!

Please consider delegating to the @stemsocial account (85% of the curation rewards are returned).

You may also include @stemsocial as a beneficiary of the rewards of this post to get a stronger support.