Figure 7-9. Reverse osmosis membrane reject staging.
All reverse osmosis designs will consider a minimum
The phase, voltage, frequency, and amperage of all
membrane rejection for all objectionable materials in the
available or planned electrical power will be determined.
pretreated saline water.
The process design, particularly with respect to pumping
b. Existing or planned facilities. Reverse osmosis
and pretreatment, must be detailed clearly.
c. Raw water information.
As with other
design must include information on the available
desalination systems, one of two limitations exist on the
sources of mechanical energy. Electrical power is the
most common energy source for conversion to
quantity of raw water to be desalinated.
mechanical pumping energy.
Both of these limitations must be considered in the