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ATV- Design of Final Clarifiers
A. Saatçı
Flocculant Granule Sludge
Flocculant Anaerobic Sludge
Granule Anaerobic Sludge
h3
Design of FCs in ATV – 131
hinlet disturbance zone = hside 2.5 m
hin 0.5 m
h1
h2
h at 2/3 raduus
hside2.5m
Final Clarifier Inlet Pipe-
Çerkezköy STP
Final Clarifier Inlet (P.Köy STP)
Should be just
above h4
Should be
within h2&h3
Detention time
should be >= 1min.
Final Clarifier Effluent Collection
Weirs (P.Köy STP)
DESIGN OF FINAL CLARIFIERS
IN ATV – 131
DESIGN OF FINAL CLARIFIERS IN ATV – 131
FC design is based on R = 0.75 and Qwwf.
Diluted Sludge Volume = DSV = R
Th
X
tXSVIX
3310.
in which tTh = Thickening time
solidsofgr
solidsml
X
tSVI
R
Th
1
)(10 3/13
Assume 1 m3 of volume in FC over the sludge accumulation zone.
liquormixedm
sludgemlSVIXmDSV
3
31 ml of sludge vol in 1 m3 of FC liquid over
sludge collect. zone.
3
1000 TH
R
tX
XDSVml
mlconcvolSludge
qSV = Sludge Volume – Surface Loading = qA . DSV
FCofareasurfacem
hvolumesludgeofm
clarifierofA
DSVQqSV 2
3 /.
Depths (h) are measured at 2/3 of radius from center.
h1 = clean water zone = 0.5
)1000/1(
)1(.5.02
DSV
R
A
Qzoneseperationh
Q in m3/h, tR = 0.5h
221000
1(2 zoneinsolidsofvolzoneinliqofVolDSVAh
)1(5.0
)1000/1(
15.02
A
DSVA
QQh RR
h3 = Storage zone = volume to store additional volume of sludge: (0.3X . SVI) with a
concentration value of 500 L/m3 expolled in 1.5 h from aeration tank.
A
QQDSV
A
QQRqh RARA
SV 9.01000
9.0)1(500
)3.0)(5.1(3
h4= Thickening and sludge removal zone
ThR
RR
ThA tA
X
X
X
tRqXh
)1(4
Suction Type Final Clarifier
