TM 5-813-8
conducted to assure the optimal coagulation process
without adequate downstream filtration and pH
adjustment will lead to suspended lime particles in the
design.
b. pH adjustment. The pH adjustment step of
feed water. Lime softening will usually remove a
significant amount of fluoride and may adjust the pH to
pretreatment must result in the optimal pH level for the
the higher levels, above 7.0, where fluoride removal is
individual desalination system. After coagulants have
optimized. Laboratory analysis or pilot studies shall be
Figure 5-1. Pretreatment techniques.
5-3
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