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MIXING, COAGULATION, AND FLOCCULATION 6.21

INLET CONDUIT -

~--L ~ _
: )
~ ~ ..
)

BAFFLE

PLAN OF MAZE FLOCCULATOR

. . . .

-1- L L .... L-

t t L
L ..... L L .... I-

PLAN OF BAFFLE FLOCCULATOR

I I
= I
-SILL
/ I ! I I I

CLEANING~" ~
SLOTS - TYP.
SECTION
SECTION
M AZE FLOCCULATOR BAFFLE FLOCCULATOR
FIGURE 6.11
Plan and section of maze and baffle flocculators.

texts give coefficients of 0.61 for square-edged orifices. In water treatment applications,
head losses and velocities are lower than the velocities assumed in textbooks, less than
1.5 ft/s (46 ClrdS), and coefficients are typically 0.8. If, in practice, head losses across baf-
fles are greater than assumed, higher head losses and higher G values will result.
For cross-flow baffle flocculators, slots typically 4 to 6 in. (10 to 15 cm) high and 16
to 24 in. (41 to 61 cm) long should be provided in the bottom of baffles for cleaning put-