Potable water contains many kinds of solids dissolved in solution. The most
prevalent is common table salt (sodium chloride). Other minerals that may be
present in solution are substances that usually contain various compounds of
calcium and sulfate. The sum of all the solids dissolved in a sample of water is
referred to as
Total Dissolved Solids
or TDS. Potable water normally averages 500 or
less ppm (parts per million) TDS although variations of 200 ppm are common. The
fundamental goal any desalination process is a significant reduction in the number
of dissolved solids in water.
Figure 3.1 - Simplified Schematic of an RO System
It should be noted that no system can remove all the dissolved solids from potable
water. The system is designed to reject approximately 99% of the TDS or, in other
words, to allow 1% of the 500 ppm TDS in the potable water to pass into the product
water. This yields water of less than 20 ppm, the recommended TDS for drinking
water. A system such as this is said to have a
salt passage
percentage of 1% or a
salt rejection
of 99%.
3.2
PRODUCT WATER QUALITY STANDARDS
This RO unit will produce permeate (product water) with a quality of < 20 ppm TDS
to provide ULTRO CLEAR quality water.
3.3
FACTORS AFFECTING PERMEATE PRODUCTION
3.3.1
VARIATIONS IN TEMPERATURE, PRESSURE AND SALINITY
Содержание Sea Recovery ULTROClear Series
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