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Improperly commissioned RO system may fail in the
matter of minutes, including irreparable membrane
failure, hardware failure, and also involves electrical and
pressure hazard. Drain flow rate and recycle flow rates should only
be configured by authorized staff.
Permeate stream comes out via permeate outlet and runs to
permeate tank. Purification process will stop whenever the tank is
full of water (signaled by the float switch) or when any backpressure
in permeate line appears, indicating critical condition. The process
will automatically resume when the full tank signal deactivates.
The system is operated with a process controller, which powers
pump(s) and valves so as to carry out service or membrane rinse in the
necessary times. The controller reads signals from pressure switches,
float switch, permeate conductivity and temperature, and external
inhibition. Depending on these signals, it chooses to run in service, rinse
membranes, go to standby, or go to fault mode. Permeate conductivity
and temperature data are displayed to the operator. Depending on
system model, it can be optionally equipped with:
–
antiscalant/chemical dosing pumps
–
additional electric valve for raw water mixing or membrane
permeate rinsing
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Technical data
Tap feed water must be pre-filtered from fine particulates
and residual chlorine before entering the RO system. Well
water may contain impurities such as hardness, iron,
manganese, silica, hydrogen sulfide that can quickly lead to membrane
failure. Some of these challenges can be addressed by using injection of
antiscalant. Perform a detailed laboratory analysis of your well water
and consult a water treatment specialist to see if you need additional
equipment for treating your well water.
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