UFC 3-280-04
17 DEC 2003
stream of return solids to the sedimentation system and increasing solids contact,
thereby improving sedimentation and reducing downstream filter loadings. One draw-
back with continuous backwash filters is that they typically remove only 95% of the in-
fluent solids, suggesting that a downstream bag or cartridge filter may be necessary,
depending on effluent requirements. Where there are effluent/discharge requirements
with low total metals concentration, multiple filtration process may be required to filter
out fine floc often associated with metals precipitation (see EM 1110-1-4012 for addi-
tional information).
Figure 3-2. Typical Size Range Within the Filtration Separation Spectrum
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