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RO Polisher Plants (Spiral Wound Membranes)

RO Polisher Plants (Spiral Wound Membranes)

The dairy industry shows an ever increasing interest in
minimization of well water consumption and waste water
disposal. As reverse osmosis systems for water recovery (RO
polisher) have been optimized to fit the demands of the
industry, more and more new applications have emerged.
For water recovery applications, the demand for crossfiow
velocity is relatively low compared to traditional dairy
applications. Consequently, 8” SW membrane elements can be
used. The SW membrane element has a unique design, where a
large membrane area is wound into a compact element.
The 8” SW system is characterized by:
-Low plant investment
-Low space requirements
-Easy membrane change
-Sanitary or semi-sanitary design
8” SW elements are available with:
-Various lengths (38-40 inches)
-Various feed spacers (20-50 mils)
-Special design for high pH/high temperature CIP
-Design for hot water Sterilization
-Various salt/COD rejection
Typical applications of RO system are as follows:
Typical applications of RO Polisher system are as
-Recovery of process water
-Recovery of RO/NF Permeate
-Recovery of Evaporator condensate
-Recovery of CIP rinse water (White water)
RO polisher plants can be supplied with any type of process
automation ranging from a simple, manual to a fully automatic
system integrated in the overall factory control system.
RO Polisher Plants (Spiral Wound Membranes)
RO Polisher Plants (Spiral Wound Membranes)


RO plant can include the following options:
-Automatic CIP dosing unit
-In line cartridge filters for soft water input
-In line filter for product with 10 micron filter
-Mix proof product manifold valve on feed, retentate and permeate inlet/outlet
-Conductivity transmitter for CIP dosing
-Automatic shut off (Isolation) of each loop to cut water consumption during CIP
-Flush water seal re circulation system. Reducing water circulation
-Dia filtration system to enable reaching a higher degree of demineralization
-UPS (Uninterrupted Power Supply)
-Air cooler for Control Panel


RO Polisher Plant usually includes the following components:
-Closed balance tank including level transmitter and CIP device
-Valve manifold including set of change over valves and automatic
butterfly valves
-Feed pressure system including feed pumps, flow transmitter and in line filter
-RO Modules and filters
-Re circulation loops each including circulation pump, tubular heat
exchanger, pressure and temperature transmitters, flow indictors
and sampling device
-Retentate/Permeate system including modulating valves, flow
transmitter, permeate pump
-Equipment for flush water including shut off valves and
adjustment valves
-Equipment for steam and cooling water including shut off valves
and non-return valves
-Set of pipes and fittings
-Set of shut off valves for water balance tank
-Stainless steel control panel including PLC, HMI, power supply,
solenoid valves, motor starters, MCC etc.
-All of the RO plants are tested in our factory before delivery
-The RO Plant Panel/Programme ensures the following are
1-Automatic temperature control in the loops
2-Automatioctotal solid ration control in the final retentate
3-Recording feed and retetnate flow and each loop temperature as long as long as the memory of HMI allows it

Simplified Flowdiagram

RO Polisher Plants Simplified Flowdiagram


Standard RO Polisher Plants with fixed capacities which are manufactured by this company are as follows:
-NF Permeate/Evaporator Condensate Polishing:
Lit/hr ف 10000 - 5000
-White Water Recovery: 5000-20000 Lit/hr
Higher capacities are available based upon request and can be
tailor made.


The required utilities for running the RO plant are as follows:

-Power supply: 3x400 VAC,50 Hz
(Other voltage and frequencies are also available upon request)
-CIP water supply: 2-3 bar(g) @ 10-50 C
-Cooling water supply: 2-3 bar(g) @ 10-50C
-Ice water supply: 2-3 bar(g)@1-2C
-Shaft seal water supply: 2-3 bar(g)@10-50 C
-Steam pressure: 2-3 bar(g)
-Air supply: 6 bar (g) Instrument air, free from oil
-Cleaning: Membrane cleaning detergent for manual or automatic dosing (Henkel or Diversey or Novadan)


The RO Polisher plant is designed fully automatic and from HMI all of the operation parameters and program sequences can be controlled and monitored. Also, all of the necessary process alarms are already incorporated into the program.
The operation presence is only required during operation as
surveillance The following process sequences are realized
-Start up/ Recirculation/Ready for product
-Pre concentration
-Re circulation of product
-Cleaning in place (CIP)