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Lecture %
Sedimmuntati or
@ pefiriion Sepaxodkon of suspended por bcs “by
growoBoreal SebLing .
porch 2 heowier than odes (Gs 3-0)
> unit opexodion in wodr ond wostiotiy freadkmnmnt
Plonks.
> Tyee I Cisexeds)
Se ling proper Kes, Tyee wu (Placenta ting)
L _ > il
@ Tee 1 renedd: (gna) ft yi
Y
-. one be
depth
+ Size, hope, density consk. ‘duvieg cetera |
No intrracton bed porticls. "Mere veloc ty,
\y. Settling velacty Congk. * PIL sold’s cane
SKB
Be Precedimentation, aut vremoveh jn Waste woke
Sore (fosk)
+ See shape. densihy choiges. using selling.
Ge Roxticlss collide + odhere X90 och okher,
(Soy) VP TT cinch > porkicle
E- gyro wth
* Ceoqulokon/Flocculation Settling - pimory se
TunkoKon of wostiwodev.
“MoE ——————— Ss
t /
DOiscredr Cake Selling ar Vi
d | ¢
J Sediling Velacidy f /
Pye ; F ua ¢ &- Sud 3 (8,- Sn) .
\ 20 7 -
ts \y | { BCo Sis Aan |
! yVOS a
Op Sro Ac
ig vieoosi tz.
Ve Vot. of Ahe Powbck = a | he views 7
fez Drea of cross ~ section of pov Bou = a a
Co = Prog Coeff. od = Ma. of parkicl
at
* Y Devievation x Derorstewes
wavil kook PAF > Fricborvl Horizon koh Flo velocidy,
= _ ‘eg Oe Shope & Si2e of pokicls
> (BSD = CALM | Mer and Ss.
: Water jump.
- — [ agy (be 89
> % = J Cs Ac Su
7 414 (8s Sad
DNG> “Gag
98a) a
a Je g cubcol_ Setlling Veloci ky Ova flew Rok
¥ Jaccl Selling +
: ~ > Taled. Bone (Baftis intorcepk with ine
Coming Westar ond spread the Flot —_ t 5
Functional
Pores
Al» Outlek Zone (wede Flows upward ond
over He ouklck wots’)
> lucy Zone (Frown bolton oF deni *
Fjush obove Scroper mechanisms)
> Sekkling Zone Csektlirg occurs) Hovizorvkak Flow velocity, | - of.
S T ‘ aie’
Selling velachy. [vs = | >depth oan
Dek enton/ re kintion Rime Of Bre tone
Vol. of dhe tank
~ Flew votre
height
kp —— : _
{1k a _~ 2 .G . _ |, Sanfoce
4M, = YT = PRL A soR 1? eye
aaa _ | Rokr
+
OR Sedkling velocity of Ane slowest powticles
hot oxe 1007, Yermoved ,
Be iro slay noone (oh fia)
(wikh FPeeminal
Vid SOR
parboliy ~ Cin Proportion to a)
Vc > Vo
Vs a
zx X00) >
Ne K Vo >
3 Vi ZS0R ¢
ky ——
KX ced = x| @ Rare ovah officioney from seAUNQ velo by ehcrac devicds
7
Tplal Pub frackiow do
be removed.
fo 1 (yan \
Cub “Rd 4-W%e) + ”
ject | Vo Jo
* ideah sekdling )
(only to
heving 2Stektd velecch
Fraction G parkclrc
— >
Sobtling veloc hy
MOisaet Ratele Sothling
KPowhicle sige distrbubon onalysis :
EX) A coddling basin ig designtd do have soR of
82.6 wofdoy . Determins. Aha overolt removal detained
for a suspension with porticle 3i9@. cbelyibidton os
Aven belas. The speciPe arovily of the Powdicle is
1.2 ond wodtr Atrnperndtere te 20°C, Ws VNORZ OP and
$= 0:99823 qm /ems
Parks size Gorm) nef 10.0g
WL frecbon (>5120)
——
= fos av FE —————_
~ (32-6 X1000° oO «
Hove, SoR = 82-6 m/ dey = “aE eo x60 er BP2B wong C
From dhe graph,
A%= 57 Vy = 01185 Trm/See VDA = 9100675 me
Ons oy VLE 0-2 rm /StC Vy D= 0:0] mm/see
O%,= Dy Vy = 0:25 rvemn/Ste Vn Os= 0:0125 mm/sec
Oy = 5 Vy = 00% rom [See Vy Dy = 2015 wen/see
MG = 757 1 Vyo= 0:325 mro/see Nobis = 01 028125 ror
TAWA = V1 OFVZAS mm [SUC
AK Ne
No
= (4- 09%5) +
= 0-918
= O87?
(Ars)
2 R= G-%) +
OXIA
0825 A Sed Gg mm fool a
fi 4 :
2 : M4 ;
KY i, ° 7 Ve | Depth = 8-30
: . e |
Ve Ze a = | 2 7 Da> Jace
“Wd = Sowphiog
: supp fe
ne a Measure Meosuxt.
uspension —> c _ &
Ahovot gly ) § ,
core. ok
le Corkeun intrvels
2,
ae
i
\ y
4 if
Tress freeton
Verne nie
ZN “is T TE
ees 3q - C7 |
iL - | 40 |
W
Tg —————
Ee) A sebtting omelysis is vu an a kype: 1 stisprn™
The cour: i6 20m deep ond deta me pow Lalor
Shak with be dhe dheevetical ye at eff cerry |
\ cebtting basin. with ov tending vod o sal
A q "4 vey : tT
r , Tao ' Te90 |
Ty ind oO’ co | 80 | 400 | 440 | 200 | 2290 | Wee 4
Irae Tigo [ao fas: fase faa. | 78 | 27
7) 4 - | :
Mass Fraction} _ |p, , 2 i , .26 | 0-09
‘erin 063 OG [056 [052/032 ome joer
Mex — [aaa los |20 454) 1-0 [08s O48
L&v/min
ad = dm
ye 25 ered = 0014 v/‘enin.
Fom he spoph, : : :
ax tay ME CT) ame
~ 40 os 5x yo"
Jo | Ox Rx 104
"10 | O-8R BR 10
40 1:08 41:08 X 1073
| 1S TUS X 19-3
TOW Ne = 36 X10
Lae 4 SE = G04) 4 FE xis >
= aeee xo
= FB 394
Pe = . %
a oe ee Soe
Yeon
fey 0. Yow
e
4
= Ro
AAA AepIr4 SOW [acal _, Oekmtion Bre = Flowing thwugh
basin
CDicplrcemend elf erency = 1:0’)
@ federndion Arrne
Ay: Pheave Beal Aine hak for the Water fo Flow
Amovgh "t ae of BRAIN TO Oe
a L. Poe if scashens
- Q yn .
Sa Ye ve ‘ '
@ Flowing Ahyovgh period :
Actual ong. tine . vahich a bokeh of water tabies
cia passing Rhrovgh « se Bling thank.
Diplacemenk _ Flowing Ahrovgh period ff 0:25 ~ 0%
L. Gficiency ~ nor
Detintion period
Actual
Preovebicol
@ Sedrmentoction bo poe ons
_ Hon sent
eared
plabs
stponots
20 YC “
, | : Vy wale |
pete] Tran Ghovied Sedamentotsonn Town J BP scvssos
/ Gceanee! eT
Troy SG chreutow CP) cull “porettul
f ' 1 ober
> Sndinud ote > Conicod ( \ aS mae
Tube octtter
Trevtasts Aht oe
S$ plain silhwuydat = ; (used for P™
oT p> wiles TH
\ SeBVr 2ne | Tnd decay Ly
ye 7
WHY Corcylor donk a is higher Show yeedentiues)
? Vi less, Paiehrry move.
Por cle soltieg tn
Tomeye of eve ro
* Flows yodiolly poh
tovords putin, [7 ektting vel
7
In creates
MAL Paictomen from core Vat FA |. Sebtting pevforrmane|
improves, |
© Powkcle posh is Povobola, Theveoses Are. Plon
Moy, din 2 60m, ove (AD for Lan
« Studgge Yernovoh cimele. some Flow rode (0) ond
reduces Chfectve $oR
© ess Troirteromee in
S No excessive wtrovery Ow,
Li Rackorler' 55 Arnentation 7
Aaooank . " but 212m,
et = tbe vas Cana ————
cause ee 5 — te ,
rere icoh t Tenosk e Sunk) 3 ‘
ied 1D Covicch = Cost Fe 0 A Morizenbol {las velaci dy
ines
Aecraases
mem
very come Same,
Scamulocky
suadep loy ax) emia. v0. of unit tonks do be Provided For 24h
wetsy supply (2) C4 as back Up)
» Studge must be dycat before csposal,
4 Affec king, Factor
» Size, shoot , weghk OF Porticles
Viscosity ond Ane. SP woter.
» SOR,» Tntk & oukll orrargemonts
Dedtintion period ond Flew dough period,
“Effect depth of settling besin (Orn)
2 Odsqn Cytria: = — memorize Gast)
G Sp = 1-25 m/oy (Discrete), OG~ Lmfdiy (Feces bra)
Ko = dtth (discret). Hh (Fieccalasiog)
we dom, Farm. G Que, Ere = 3H
Flecendotng)
Ly Vy O15 09 m/min (0-3 m/min.)
hel Flow th Wh = my. doy dempnd .
pk Vosk 2 vmnits yt
Devievottion cf Ascreke pordcle SHUg gcoverery)
Neat Yoret = F- F
= C85 Su) 9 Vs
v
f = Cp: As: Sw" Ve
Su
>
Wer, Ve = as Ag =
Ra?
Ms = Wa
—~ As nav 2
Draq coeff, Cy = 1.6
Ne
\Reynold’s No.
fowrivon Fl > Ne 1
14 28 :
“Pomsibonel Fw — Cy = a a 034
Turbulmk Flow > Cy = 0-44
ove: durd
fox laminoy Flow, Ne = oy
TAM
@ Va Aud Su° Lm ©}
i tak ©),
= Sa Lever Sad
= as Oe a a.
§s- Su
oan
toys dGs-8)
ew :
- = QC 85-8) (ug Cfe-s spa |
nye Oise &) 0) M9 U
LQ =
1b oy BO Ss
Cy Follous overs
04 plow must b = she der
. Po. chy
we ist Nao
“hy ol f . ugh period
Tetrion period is moe than Flowing through
Aas. ; rath
MN ey
Detention Ame is cabouladid bosed 07 qeomeby,.
Buk in Xeabity, Anne is turbulence at top lezer
And droq, ricdion ak boklom layer, 3 Abe definition
Bmw % coleuladted without consideriog alt Ahese,
On the other hond, Flow through paved ** Colowladeel
Considering od Hhese be. tk is Lhe prockeol
delonbon period.
i forkicls soe, chopt ov weight influence scthling,
Pex Formonce ?
Ans:
Mt: ert bn
at [iy [aga
ius wight densiky more dren ek Khon selllament
eccurs, okerwise nok.
if uuences viscosity.
lemme
use viscosity, por Bes seAlle casily,
40K
a} Pegbthy Cm meh)
| yee ve EEO ,—(C lll rll _—C Pe re
\
gt
Achim] Tor o lor vedo nto basin, S08
. 2 j., designed 40 Vermeve My
Brom/ce
Vom fmings Live indo® eve
‘\pekwbon 4
Fred MAE lepta) of deal, F"DemM nD SE te
lanai dented Flo velacty om ee
Ako chick the nari Pondc ovuplecd rode
=,\n
“\
- (0-2 x30°> XG0) ov 0:08 m/min,
SoR = 0:3 mm/sec = .
Now, soR = 2
7 A
el)
D> OIG = =A
A= C6OGF nt
Ajein, nt
Az Lx = axes a0
D> Uwe GEG: 6%
We 19.91 ™
Bub, WP lim
J owe 12m
Ls Atm
3
2 Vole of dreotd Water, Ve QT = {2 x2X60)m
Vo yo. ALLO om?
L. depth of ton, d= Ge ee age:
(Ar *
t ev
’ MO \y ‘ r Prov 4 4
. hu hype -T1 id vernoval he
' t yorr A
' nevcact PAE eval Leet
. Hot ib will . .
rotted 9
For Aye TL oadiney Cooqulant is a goad idee
Adding Coaqutonk, sedimentation ° proctss wil.
Imprve. Wat can be collictd rom the
Upper sia forr only and oth imepuni&es (Gs> 4-0)
Ore ccttted in the sludge 2ere,
Foxe Aype F— evo effect of Congquilent
(use lain sedmuntaten)
XE To increase. Are Pex formance ox removal ethic;
ot clark Pav tick Sting
whok’s the effect on portcle Yemoval OFficiency 9
Ans
Removal Cflicime y of sedimentation doesn’t depend
On depth. So + 50% depth fave been veducad
Patou vermnoval efficenc y wilh Yemoamn Same,
is ~ condryuous flow SARL ng tonk, Bm aap and
“8m bony, find Lhe recommended velociky af wots flow
Ta effective Yemoval of 0025 mm powkcus ot 25°C.
Sreific spovity of iporbck 1g. 50:65 and nemecte
“sousity of wady is 001 Ose Gor
Som: ¢
vy -1Gs rd |G = a 2. 8, = 265 x 1000 .
ee igh ~ = 2650 kaon
urd ; = 1000)
velocity 2 CE he d= doe xwe™
yy = Hoo we IxyorS x 1000
a “4 m/s, =
eS 562 X 30 a Bs = yew ner
Ve ke
a Hoag
it =
? S61xit >
Me = OO ws:
ye (Ans? |
~ . | aboulott dine dimension of O mores J ley
ror Untion ¢}
pita weodsy olovience
+t ar is i . _
} 125 Litas. Assume duturtion paiod oy 4h
ro
Sol”:
Per Capifa ong: dernond = 185 Lecd
"Avg. doy denand = ae) ra /h
tooo x DH
= ayocas wm/h
Now, T= Gh Mor, doy demon = ae
ve OF = (GX 258125) or 1518.25
Noch
ry ANore ekkitng dom “for
- “
GOD prsors . g
PUxsong with a daily po
a
show)
Cab) ow 25312!
ev Dos
> 4w.w:3 = IBIS 25 5 LAssume, d= oe
> iwe |W
K. 7 width = [25m 7
length = (4x1 25) or 4Gen
(Cos. Gwen, O= 25% 10° Udey = x0? ve /day
A= 100
” U5%x) o> ee ee
ae > (2a 0150 r/doy = eco eee
yoo
Porcankoyt of pow Bele seth eae
A> Cex (00) = (era ) oy $00 7
Ns
R-> Ce x00) = SIE x00 ox BOS”
C> Cs % (oo) * = Gris xi dee C927
en haminal veloady
“thing vclectdy
d
Removal gf discvedt
¥ ¢
x
> Tp the flow va
MOLas es
“| the poaticie i
MMacase, daceasc A 1 eae
Ars
le Knew’ /
co is
. tc? = — X00
Removal eff crecy SMO
ral
ad
“Thes.
Nemes
SOR MG
oR d ved
BS F
Piety inereasa, ey A absifier with o On oMea oF “350 w Prods o flew
oF . 3000 wi/doy, “The wicker exter mg eee eee
a suelen nurker of chy oggriqed with a
Specific oraviky OF 105 and diowelar of 0:05 mm.
Whek percerttoge of these particles wilh be removed
in He clovifier 2
(2 0:99$23, We 100TTeP ak 20°C)
[Soren
~ 9 s$a a Dent ocesee
gh _ 4 -
51 Clos - ood) xloesueF} = 0082 XO" e/a
=~ aex Poosexin> |G, = bos
= Gug x10? m/s a Sse hoe
Q 000° Sea
we AT 5 OH) ge (1105%0 99823) ee
= azes ym m/s = 04g anon
Seen al = 005 xX10>™
= 215K 10/5.
2.R = Me of 1007,
$
GAS X Jord
= KX 1097,
LBS Kw 2
- W7>
Pens ) ae
Fela
hoe oO Sree dynent plant pidh a aesgn '
Or
2 4
4 Sons
Won 9pAIone per days defarmink Abt tremens
a : Q wy bein with 6
. Vion sediment azion
100 ed [TA
Beers an ce fey ee eee te 700.904 /}
and
Ungth= width woo 24:4
(Ascvmns. 1:0 49 = F4@ gel)
Sai:
B= 1x08 gallon/dor
T= Uh
Now, SoR= 700 aea/ Be
> = R00
e ant ov DV&S5Z 14d FLY
ae 700
> 4vw= USS FMW
ees
ee ore 406-9 FF
— (2x\0®) gy ges.
Agoin, @= DKA Quen] dey = nes) i)
BWMloy/r,
Lye OTe (y388-89 x 4x60) 392233-6 gaitons
ov AYSG3. 3) 43 DEex~w xr d = 44563° 3)
=) \G'DX Wd %d = 563° 31
sage ZM1bG3.3!
Jour DN IGS
@ Formule ak a glance:
oy = 2Gs-s537
Bw 7
Me GB. Go
Be Oe wee
2 QO. goa,
la area
- oy
TH
G@se
Se
LF = FUE gal.
Me ae
owe
15-6 4k>
(Ans.)
“ % oeked = “x oor
2 OX V4
P= Cw) my,
oe vy =a
y= e » MET
6 pg = Bevis theveh prtod
Deblion Period,
wa
yz
Sa
AcP = 10> Nofnv
