Types of Commercial RO Membrane | RO Plant Membrane

Types of Commercial RO Membrane | RO Plant Membrane - Netsol Water - ETP, STP, WTP, RO, Water Softener, DM Plant - 09650608473
There are two common types of membranes: cellulose acetate (CA) and thin film composite (TFC).
The membrane is a very thin plate made of a synthetic plastic material with very fine holes or pores. The size of the pores depends on the type of membrane used in the water filter. Membranes used in water filters are classified into microfiltration membrane MF, ultrafiltration membrane UF, nano-filtration membrane NF, and reverse osmosis RO membrane according to the pore size of the membrane.
Reverse osmosis (RO) water treatment contains a semi-permeable membrane. There are two
common types of membranes: cellulose acetate (CA) and thin film composite (TFC). One advantage of
the CA membrane is it is more resistant to chlorine than the TFC membrane. However, TFC
membranes are much more efficient and superior in performance overall compared to CA membranes.
The RO membrane can remove particles that are Angstrom in size (human hair is ca. 1,000,000
Angstroms in size). Figure 1 below describes capability of reverse osmosis membrane.
MAIN COMPONENTS OF SPIRAL WOUND ELEMENTS
The membrane is a polyamide thin film composite (TFC) sheet which is ca. 2,000 Angstroms thick.
This is the outside of the envelope in our analogy.
To create turbulent flow and good mixing in the feed water stream, typically a diamond shaped mesh
screen (called a feed spacer) is placed in between the membrane sheet and it is spirally wound along
with RO membrane.
To efficiently transport permeate water to come out of the spiral wound membrane element, a permeate spacer is placed backside of the RO membrane (i.e. inside the envelope in our envelope analogy). Once permeate water is collected inside the envelope, the permeate spacer carries permeate water to product water tube.
Polyurethane glue is used to seal three sides of membrane so that feed water is isolated/separated from permeate water.
The product water tube has multiple holes in them allowing permeate water to go through these holes and flows out of product water tube.
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