37
Constituent Ion/Molecule
Maximum Limits (ppm)
Magnesium
30
Calcium
75
Calcium Carbonate
100
Iron
.1
Manganese
.05
Total Dissolved Solids
500
Turbidity
5
Oil
.1
Detergents (anionic)
.2
Phenols
.001
Bacteria - E Coli (per 100 ml)
0
Table 3.0 - Drinking Water Standards
3.3
FACTORS AFFECTING PERMEATE PRODUCTION
VARIATIONS IN TEMPERATURE, PRESSURE AND SALINITY: The following table illustrates how the quality
and quantity of permeate produced by the RO system is affected by changes in temperature, salinity, and
pressure:
With constant....
And increasing....
Permeate
TDS
Capacity
Salinity and Pressure
Temperature and Pressure
Temperature and Salinity
Temperature
Salinity
Pressure
Increases
Increases
Decreases
Increases
Decreases
Increases
Table 3.1: Factors Affecting Permeate Quality
Note
If feedwater salt concentration decreases, the product water flow rate should not be allowed
to increase more than 20% above rated flow. Membrane Reject pressure will need to be
lowered to maintain rated flow in brackish water or freshwater applications.
The RO system can be adjusted to maintain a constant permeate output when feedwater salinity
is below nominal (near river mouths or in estuaries). The operator can do this by controlling system
pressure manually via the back-pressure regulator valve, located in the system brine piping. For long
pump life and low membrane fouling, Parker recommends that 9 psi is not exceeded except in
situations of extreme low temperature feed water.
Содержание AQUA DUO - A455C
Страница 15: ...15 Figure 2 4 Piping and Instrumentation Diagram 2800 3600 GPD...
Страница 16: ...16 Figure 2 5 Piping and Instrumentation Diagram 2800 3600 GPD with Optional 20 Micron Prefilter...
Страница 17: ...17 Figure 2 6 Piping and Instrumentation Diagram 4800 6200 GPD...
Страница 18: ...18 Figure 2 7 Piping and Instrumentation Diagram 4800 6200 GPD with Optional 20 Micron Prefilter...
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