5 Water purification process description
Purification phase
Remarks
5.1 Pretreatment
Removes:
- Particles of size equal to or above 5 µ.
- 99.99% of hypochlorite.
- Most of the organic material present in the feed water.
On equipment installed in areas where the feed water has high
amounts of suspended solids, turbidity or colloids, it may be
necessary to include additional prefilters to reduce significantly the
presence of substances that may affect the equipment's
performance.
In very hard water it is necessary to install a water softener before
feeding the equipment.
Cartridge 1 and 2
5.2 Reverse osmosis
Removes:
> 99.95 % of organic matter (greater than 150 Dalton) present in
the water and 95 - 98% of the Total Dissolved Solids (TDS).
The RO membrane must operate at pressure of 4 - 6 bar
for optimum performance. There should be a minimum
inlet pressure of 2.5 bar.
In facilities with high inlet pressure (> 6 bar) it is necessary
to install a pressure regulator before the water inlet to the
equipment.
5.3 Deionisation
The permeate passes through a mixed bed of strong cation/anion
resins, retaining all the anions and cations still present in the water
and which have not been removed in the RO process.
The result is a Type II Analytic Grade Water with a conductivity of
less than 0.2 µS/cm (Resistivity > 5 M
Ω
.cm) newly produced.
Cartridge 3 and 4
-
5.4 Type II Water Storage
Type II Water is stored in an open tank, ready for use.
A level detector must be connected to the tank to work in automatic
mode.
Rear connections:
- [0] Tank level
- [1] Rejection
- [2] Tank
- [3] Feed water
5.5 Automatic operation of the equipment
The equipment has the following operating modes:
- Production:
The equipment produces Type II Water that is sent to the storage tank. When the tank is full,
the equipment stops automatically.
- Standby:
The equipment does not produce water because the tank is full.
-
Water dispensation:
The user obtains Type II Water taking it directly from the storage tank
