Page 400 - Water and wastewater engineering

SEDIMENTATION 10-17

about 60 . The configurations are named to reflect the direction of flow of water with respect to
the direction that the particles will leave the plates or tubes: countercurrent, cocurrent, and cross-
current. Thus, for example, the countercurrent configuration is one in which the flow of water is
in the opposite direction to that of the particles.

Effluent
d
Turbld water L p v fc

Solids
v
s
yx
Influent

Solids
(a)
Effluent Influent
d
Solids Turbid water Solids Turbid water L p

v v s y x
fc

Solids
(b)
Influent

y
v x
fc
z
v s
Effluent

d
L
p
Solids Solids
(c)
FIGURE 10-12
Flow patterns for inclined settling systems ( a ) countercurrent, ( b ) cocurrent, ( c ) crosscurrent.