Question about a sentence in \"Reverse Osmosis Water Treatment Projects\"
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As shown in the figure, I don’t understand the phrase “not sufficient to prevent” in the last sentence; I would appreciate an explanation. Thank you!
It’s not enough to stop it; in other words, it cannot be stopped. . . For this reason, UF membranes are not prone to clogging, as the impurities trapped on the membrane surface are pushed back into the main flow of water by the vertical shear force. Horizontal shear force cannot prevent this motion. . This is also one of the reasons why dead-end filtration is not recommended for UF membranes.
I feel that this statement is contradictory; the shear force acting parallel to the membrane should facilitate the return of contaminants back into the main water flow. The shear force resulting from the high-speed flow of water through the UF membrane is supposed to be perpendicular to the membrane, and such a force would hinder the return of contaminants to the main water flow. That’s how I understand it. Could I be wrong?
There is some truth to what you say. Let me analyze it again.
Do you mean that the part in yellow should be changed to “cannot make” or to “can”?”
Yes, that’s exactly what I mean. But these are books that have been published and distributed; I’m not sure, so let me explain it here.
It’s been two years, and looking back, I still don’t understand it!