Installation guide

RO-MAN REVERSE OSMOSIS SYSTEM INSTALLATION GUIDE
15
T
O ESTIMATE THE EFFECT OF NET PRESSURE, FOLLOW THESE STEPS:
C
ALCULATE THE NET PRESSURE AT WHICH THE MEMBRANE IS RATED (P
R
)
P
R
= (RATE PRESSURE) - (OSMOTIC PRESSURE OF TEST SOLUTION)
Nominal Rejection Characteristics of Thin Film Composite Reverse Osmosis Membranes
Ion % Rejection
Calcium 93-99
Sodium 92-98
Magnesium 93-98
Potassium 92-96
Manganese 96-98
Iron 96-98
Aluminium 96-98
Copper 96-99
Nickel 96-99
Cadmium 93-97
Silver 93-96
Zinc 96-98
Mercury 94-97
Hardness Ca&Mg 93-97
Radioactivity 93-97
Chloride 92-98
Ion 92-98
Bromide 90-95
Phosphate 95-98
Cyanide 90-97
Sulphate 96-99
Thiosulfate 96-98
Silicate 92-95
Silica 90-98
Nitrate 90-95
Boron 50-70
Borate 30-50
Fluoride 92-95
Polyphosphate 96-98
Orthophosphate 96-98
Chromate 85-95
Bacteria 99+
Lead 95-98
Arsenic 50-90
N
OTE: THE ABOVE PERCENT REJECTION IS FOR REFERENCE ONLY. ACTUAL REJECTION WILL DEPEND
HEAVILY ON THE EXACT CHEMISTRY
, TEMPERATURE, PRESSURE AND TDS CONTENT OF THE FEED WATER.
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