Membrane: Varying pressure drop for flow rate
Membrane: Varying pressure drop for flow rate
(OP)
I'm working with a cross flow membrane at the moment.. what I've noticed is that at lower TMP's, the dP across the membrane is higher, to give me X gpm.
At higher TMP's the dP is lower to give me the same X gpm.
I have 2 flow meters in the line checking the flow, and the X gpm rate is correct. It's also been "bucket tested".
Any ideas?
At higher TMP's the dP is lower to give me the same X gpm.
I have 2 flow meters in the line checking the flow, and the X gpm rate is correct. It's also been "bucket tested".
Any ideas?





RE: Membrane: Varying pressure drop for flow rate
Drop pressure (DP)is in relation with retentate flow and viscosity. Linear velocity along membrane drives DP.
Permeate flow is in relation with TMP but there is no crosslinking between these two parameters
Best regards
RE: Membrane: Varying pressure drop for flow rate
Depending on the type of membrane that you are using, a higher delta PTM can give either more or less permeate. In MF the max delta P I would stay under is 0.5-1.0 bar, in UF 1 - 10 bar and in RO it is really not very relevant.
In MF the crossflow should be very high, lower in UF and in RO balanced to prevent scaling. Hope this helps you abit.
RE: Membrane: Varying pressure drop for flow rate
RE: Membrane: Varying pressure drop for flow rate
How are you
let me know
greetings
membranedr