CIP —Clean-in-place
FF —Forward flush
NC —Normally closed
NO —Normally open
TDS —Total dissolved solids
PCB —Printed circuit board
P&ID —Pipe and instrument diagram
RO —Reverse osmosis
GPM —Gallon per minute
GPD —Gallon per day
2.1. OVERVIEW
Brio reverse osmosis systems are used for demineralizing water in industrial, municipal, commercial
applications. Brio RO system can be used to demineralize low to medium salinity feed water. System
components comprise carbon steel skid, industry standard Big Blue 20 prefilters, high pressure
pump, array of pressure vessels with membranes, power cabinet, process controller, and the
necessary valves and instruments.
This appliance is not intended for use by persons (including children) with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge, unless
they have been given supervision or instruction concerning use of the appliance by a
person responsible for their safety. Children should be supervised to ensure that they
do not play with the appliance.
Brio RO systems operate as follows.
Raw water is fed through sediment prefilter in order to remove particles. If raw water is treated
with antiscalant or other RO chemicals, the prefilter housing ensures better mixing.
Then, high pressure pump feeds the water into the membrane module or membrane array,
in which feed water undergoes separation process and splits into permeate and concentrate
streams.
Permeate (purified water) goes to the permeate outlet and is collected in water tank. Permeate line
is also fitted with a pressure switch to halt the unit if significant pressure builds in permeate line
indicating a full pressurized tank or pipeline shutoff.
Float switch has to be put inside an ambient pressure tank (if used) to start and stop the unit
depending on the level of permeate in the tank.
Part of the concentrate stream is discharged to drain via drain rotameter. The rest goes back to the
suction end of the high pressure pump via recycle rotameter.
Flow rates of drained and recycled concentrate have to be regulated to specified ranges in the
Technical specifications with the regulating valves built in the rotameters.
When operation is interrupted by float switch or pressure switch signal, the system runs a forward
flush (membrane rinse) cycle, then switches to standby. The controller receives temperature and
conductivity of permeate, permeate level, pressure switch statuses, and external inhibition signals.
The RO unit can be fitted with an optional permeate flush or raw water blending assembly.
It is recommended to review the installation diagrams of complex water treatment systems that
include a reverse osmosis system. The installation diagrams are given in Annex A.
