Microfiltration, in surface water treatment, can efficiently remove particles much more lower than 20 microns without coagulant. Even some sand filters can remove 20 microns particles without coagulant. I tested one backwashable sand filter, and without coagulant, it can remove 75% of particles...
Are you talking about backwashable membranes? That is not what I am looking for. I have already tested backwashable ultrafiltration and microfiltration membranes. They do fine job, but too much expensive.
What I want is a backwashable prefilter.
Does anybody have document/article/notes about interactions between iron and organics in surface water.
I am looking for information about organic and iron complexes in surface water.
Thanks!
Yes, I measured the SDI that is very high, between 6 and 6,5 (SDI 15 min).
I tested multimedia filter, but not efficient enough.
I also tested integrated membrane systems (UF/NF). That's fine, but too expensive for small municipalities.
Conventional treatment system as pretreatment for membrane...
My interest is in surface water treatment by membrane filtration (nanofiltration).
I am looking for an automatic backwashing prefilter that can remove particle between 10 an 2 microns in raw surface water.
A part from chemical treatment (coagulation/ flocculation …) do you know any other way to...
