Question about fouling of membranes
I have taken my single post RO..... Series 4 Procon, 3/4HP motor, Dow XLE 4040 Membrane and added a 2nd membrane to the system and I plumbed them in series.
I've been told that a single pass through a single 4040 should of taken me from 2% to 6-8%. I never got that sort of performance at 200psi. So now adding the 2nd membrane and again using a single pass I am hoping to finally approach those number or even a bit higher.
I've been told to watch out for membrane fouling on the 2nd membrane. What exactly does that mean? How would I avoid that? Is it a real risk simply by adding the 2nd membrane will the sugar content be too high once it passes through? Can I avoid it by running at a different pressure?
Just want to see everyone's thoughts or experience running a 2 membrane 4040 setup.
Thanks!
2022 4x40" RO, Welch 1397 Vac Pump, 3 Guzzler Pumps, Lapierre Releaser, 1100 taps
2021 Twin Baby Boys, Close to 650 taps
2020 Upgraded RO to 2 post and 7GBS Pump. 265 taps
2019 Smoky Lake 2x6 raised flue, Autodraw system, Maple Jet Filter Press, a beautiful new bride to be my sugaring partner :-)
2017 Expanded Sugar Shack, new 2x6 with float box, NEXTgen Maple RO, 250+ taps, still on sap sacks
2016 Sugar Shack, 2x6 evaporator, 160 taps, all on Sap Sacks
2014 110 taps
2013 35 taps