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7/23/2019 Water and Wastewater Treatment: Secondary Sedimentation Tank
1/22
\`ead`gumuabg"Lnm{aoalmuabg #mge
ucali`gagh!
E{' Mi`vmua \' [`eeq
M||blamu` V{bo`||b{. Ucmvm{ Pga`{|auq
Ucmvm{ L`gu`{ ob{ Agep|u{amn [`|`m{lc / E``nbvd`gu
Vmuamnm #Vpgjmk! =58 665AGEAM
7/23/2019 Water and Wastewater Treatment: Secondary Sedimentation Tank
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Cage`{`e b{ Zbg` \`uunagh
Ag |q|u`d| xauc cahc \\. ag meeauabg ub ea|l{`u` mge onbllpn`gu|`uunagh. kbuc cage`{`e b{ zbg` |`uunagh mge lbdv{`||abg|`uunagh mn|b bllp{
Na}pae u`ge| ub db` pv uc{bphc uc` agu`{|ual`| bo uc`
lbgumluagh vm{ualn`| Lbgumluagh vm{ualn`| u`ge ub |`uun` m| m zbg` b{ knmgi`u
Ln`m{ nmq`{ bo xmu`{ a| v{bepl`e mkb` uc` knmgi`u
[mu` bo |`uunagh ag uc` cage`{`e |`uunagh zbg` a| m opgluabg bolbgl`gu{muabg bo |bnae| mge uc`a{ lcm{mlu`{a|ual|
M| |`uunagh lbguagp`|. lbdv{`||`e nmq`{ bo vm{ualn`| k`hag ubob{d bg uc` kbuubd
Mkb` uc` lbdv{`||`e nmq`{ lbgl`gu{muabg bo |bnae| a||pll`||a`nq nbx`{ pvub uc` agu`{oml`
7/23/2019 Water and Wastewater Treatment: Secondary Sedimentation Tank
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Mvv{bmlc`| ob{ e`|ahg mge |`uunagh u`|u|
Uxb e`|ahg mvv{bmlc`| ub oage bpu m{`m {`}pa{`e ob{ uc`
|`uunagh mge ucali`gagh omlanaua`| Emum g``e`e a| bkumag`e o{bd uc` kmulc |`uunagh u`|u|
Oa{|u mvv{bmlc p|`| emum e`{a`e o{bd bg` b{ db{` kmulc|`uunagh u`|u|
\`lbge mvv{bmlc #|bnae| onps d`ucbe! p|`| emum bkumag`e o{bd
m |`{a`| |`uunagh u`|u| lbgeplu`e mu eaoo`{`gu |bnae| lbgl`gu{muabg
Uc` d`ucbe| m{` {m{`nq p|`e ag uc` e`|ahg bo |dmnn u{`mud`guvnmgu|
7/23/2019 Water and Wastewater Treatment: Secondary Sedimentation Tank
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Ag meeauabg ub ea|l{`u mge onbllpnmgu |`uunagh. cage`{`e"zbg` mgelbdv{`||abg |`uunagh mn|b bllp{ ag |`lbgem{q lnm{aoa`{
Oagmn b`{onbx {mu` ob{ m |`lbgem{q lnm{aoa { a| |`n`lu`e km|`e bguc` lbg|ae`{muabg bo
M{`m g``e`e ob{ lnm{aoalmuabg M{`m g``e`e ob{ ucali`gagh
[mu` bo |npeh` xauce{mxmn
Ag Umndmeh` mge Oaulc d`ucbe. Emum o{bd m |aghn` |`uunagh u`|u a|p|`e ob{ uc` e`|ahg bo m |`lbgem{q lnm{aoa`{
Kbuc m{`m {`}pa{`e ob{ ucali`gagh mge m{`m {`}pa{`e ob{lnm{aoalmuabg m{` obpge bpu mge xcalc``{ a| h{`mu`{ a| lbg|ae`{`eag uc` e`|ahg bo uc` |`lbgem{q lnm{aoa`{
M{`m {`}pa{`e ob{ lnm{aoalmuabg a| p|pmnnq h{`mu`{ ucmg uc` m{`m{`}pa{`e ob{ ucali`gagh
Oa{|u Mvv{bmlc#Umndmeh` mge Oaulc d`ucbe!
7/23/2019 Water and Wastewater Treatment: Secondary Sedimentation Tank
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M{`m {`}pa{`e ob{ ucali`gagh
Up lb{{`|vbge| ub Cp mge bkumag`e uc{bphc
Lb a| agauamn lbgl`gu{muabg boU\\ mge Cb lbnpdg c`ahcu
Cp a| |npeh` c`ahcu ob{ LpU\\ lbgl`gu{muabg
Oage l{aualmn lbgl`gu{muabg lbgu{bnnagh uc` |npeh` cmgenaghlmvmkanauq
E{mx umgh`gu| ub uc` agauamn mge oagmn n h| bo uc` |`uunagh lp{` Ka|`lu uc` mghn bo agu`{|`luabg bo uc` umgh`gu| mge su ge uc`
ka|`lub{ ub |`uunagh lp{` ub h`u Ll
Oage up #uad` mu xcalc |npeh` lbgl`gu{muabg a| Lp!
E{mx umgh`gu uc{bphc Ll Nblmu` Cp bg q$msa|. `su`ge cb{azbgumn nag` ub uc` umgh`gu uc{bphc
Ll mge e{mx `{ualmn o{bd uc` agu`{|`luabg ub bkumag Up
b
pu
C]uM -
p
bbp
L
L-
Oa{|u Mvv{bmlc#Umndmeh` mge Oaulc d`ucbe!
7/23/2019 Water and Wastewater Treatment: Secondary Sedimentation Tank
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M{`m ob{ lnm{aoalmuabg
C`{` ] a| lnm{aoalmuabg {mu
_ a| agu`{oml` |pk|ae`gl` `nblauq
Agu`{oml` |pk|ae`gl` `nblauq \nbv` bo uc` umgh`gu bg uc` agauamn n`h bo uc` |`uunagh lp{`
a| umi`g m| |pk|ae`gl` `nblauq
Lnm{aoalmuabg {mu`
umi`g m| v{bvb{uabgmn ub uc` na}pae bnpd` mkb` uc`l{aualmn |npeh` zbg` mge lbdvpu`e m|
C`{` Cl a| e`vuc bo l{aualmn |npeh` zbg`
] a| onbx {mu` bo das`e na}pb{ agub uc` lnm{aoa`{
v
]M ll -
b
ll
C
C]] -
Oa{|u Mvv{bmlc#Umndmeh` mge Oaulc d`ucbe!
7/23/2019 Water and Wastewater Treatment: Secondary Sedimentation Tank
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\bnae| onps d`ucbe M{`m {`}pa{`e ob{ ucali`gagh uc` das`e na}pb{ |bnae|
mvvna`e e`v`ge| bg uc` nadauagh |bnae| onps ucmu lmg k`u{mg|vb{u`e ub uc` kbuubd bo uc` |`uunagh umgi
\bnae| onps e`v`ge| bg uc` lcm{mlu`{a|ual| bo uc` |npeh`#lbnpdg |`uunagh u`|u| lmg k` p|`e ub e`u`{dag`{`nmuabg|cav k`ux``g |npeh` lbgl`gu{muabg mge |`uunagh{mu` mge |bnae| onps!
Xaucag uc` |`uunagh umgi ebxgxm{e onps bo |bnae| a| k{bphcumkbpu kq h{mauq |`uunagh mge kq kpni u{mg|vb{u bllp{{aghep` ub |npeh` xauce{mxmn o{bd kbuubd
\Oh a| |bnae| onps ep` ub h{mauq
\Op a| |bnae| onps kq kpni u{mg|vb{u
\bnae| onps ep` ub h{mauq
La a| lbgl`gu{muabg bo |bnae| mu uc` vbagu ag }p`|uabg
_a a| |`uunagh `nblauq bo uc` |bnae| mu La lbgl`gu{muabg
phu \O\O\O -
aah _\O -
7/23/2019 Water and Wastewater Treatment: Secondary Sedimentation Tank
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\bnae| onps kq kpni u{mg|vb{u
Pk a| kpni pge`{onbx `nblauq
]p a| pge`{onbx {mu` bo |npeh`
M l{b|| |`luabgmn m{`m bo uc` |npeh`
_a bo |npeh` mu eaoo`{`gu lbgl`gu{muabg| a| bkumag`e uc{bphcdpnuavn` |`uunagh u`|u| mu eaoo`{`gu lbgl`gu{muabg|
\nbv` bo uc` agauamn vb{uabg bo uc` lp{` a| umi`g m| _a
\bnae| onps ep` ub h{mauq #\Oh!
Mu nbx lbgl`gu{muabg #>=666 dh"n! |`uunagh `nblauq a| cahc mge
e`l{`m|`| xauc agl{`m|agh lbgl`gu{muabg ep` ub cage`{`e |`uunagh Agauamnnq \Oh a| `{q |dmnn mge oa{|u agl{ m|`| xauc agl{`m|agh
lbgl`gu{muabg mge uc`g e`l{`m|`|
Onps kq kpni u{mg|vb{u nag`m{nq agl{`m|`| xauc agl{`m|aghxauce{mxmn {mu`
U
bumn onps agl{`m|`| agauamnnq. uc`g e{bv| ub nadauagh |bnae|onps mge uc`g agl{`m|`| xauc agl{`m|agh xauce{mxmn {mu`
M]LPL\O pakap --
\bnae| onps d`ucbe
7/23/2019 Water and Wastewater Treatment: Secondary Sedimentation Tank
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M{`m ob{ ucali`gagh
E{mx cb{azbgumn nag` umgh`gu ub uc` nbx vbagu bg uc` ubumnonps lp{` vbagu bo agu`{|`luabg xauc uc` `{ualmn msa|{`v{`|`gu| nadauagh |bnae| onps #\On. uc` onps ucmu lmg k`v{bl`||`| ag uc` |`uunagh km|ag!
Ao |bnae| nbmeagh a| h{`mu`{ ucmg nadauagh |bnae| onps uc`g |bnae|
xann kpane pv ag uc` |`uunagh km|ag mge pnuadmu`nq b`{onbx
Pge`{onbx |npeh` lbgl`gu{muabg #Lp! lb{{`|vbgeagh ubnadauagh |bnae| onps a| bkumag`e kq e{bvvagh `{ualmn ub s$msa|o{bd uc` agu`{|`luabg bo uc` cb{azbgumn nag` xauc uc`pge`{onbx onps nag`
M{`m {`}pa{`e ob{ ucali`gagh
Ob{ m e`|a{`e pge`{onbx lbgl`gu{muabg bg` lmg agl{`m|` b{
e`l{`m|` uc` |nbv` bo uc` pge`{onbx onps nag`
N
pp
\O
L]]M
-
\bnae| onps d`ucbe
] a| b`{onbx
]p a| pge`{onbx
\ON a| nadauagh |bnae| onps
7/23/2019 Water and Wastewater Treatment: Secondary Sedimentation Tank
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7/23/2019 Water and Wastewater Treatment: Secondary Sedimentation Tank
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Mnu`{gmua` h{mvcalmn d`ucbe ob{ \ON
P|`| bgnq uc` h{mauq onps lp{` Bg` |cbpne e`lae` uc` pge`{onbx |npeh` lbgl`gu{muabg
e{mx umgh`gu ub h{mauq onps lp{` uc{bphc pge`{onbx |npeh`lbgl`gu{muabg bg S$msa| mge `su`ge ub uc` Q$msa|
Uc` vbagu bo agu`{|`luabg bg Q$msa| ha`| \ON
\bnae| onps d`ucbe
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\`uunagh mge ucali`gagh lcm{mlu`{a|ual| bo uc` das`e na}pb{d`m|p{`e kq `auc`{ \_A b{ Z\_ lmg k` p|`e m| km|a|
\_A k`nbx =66 a| e`|a{`e mge mkb` =06 uqvalmnnq agealmu`|oanmd`gubp| h{bxuc
\p{oml` b`{ onbx {mu` ob{ m |`lbgem{q lnm{aoa`{ a| {`nmu`e ub zbg`|`uunagh `nblauq m| |cbxg k`nbx
Z\_ #_a! lmg k` `|uadmu`e kq
C`{` _a a| zbg` |`uunagh `nblauq #\_A!
\O a| |mo`uq omlub{ mge umi`g m| ='80 ub ;'0
_dms a| dmsadpd zbg` |`uunagh `nblauq umi`g m| 8 d"c
I a| m lbg|umgu xauc mnp` ?66 n"dh ob{ DN xauc \_A =06
S ao DN\\ lbgl`gu{muabg
E`|ahg bo \`lbgem{q lnm{aoa`{ bg uc` km|a|bo \_A mge Z\_
\O{mu`bv`{onbx\p{oml` a-
sIa
!`sv#dms
-
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DN\\. Z\_ mge \_A"E\_A m{` {`nmu`e
C`{` s a| DN\\ lbgl`gu{muabg ag h"n
E\_A mge \_A ag dn"h
Onplupmuabg| ag xm|u`xmu`{ mge {`up{g |npeh` onbx {mu`| mge DN\\lbgl`gu{muabg |cbpne k` lbg|ae`{`e ag uc` e`|ahg
\mo`uq omlub{ p|`e a| d`mgu ob{ uca| vp{vb|`
\bnae| nbmeagh {mu` a| m nadauagh vm{md`u`{ mge moo`lu| `oonp`gulbgl`gu{muabg bo U\\
@oonp`gu }pmnauq {`dmag| pgmoo`lu e b`{ m xae` {mgh` bo |p{oml`b`{onbx {mu`| #pvub
7/23/2019 Water and Wastewater Treatment: Secondary Sedimentation Tank
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\`lbgem{q \`ead`gumuabg Umgi
Dplc bo uc` agob{dmuabg v{`|`gu`e ob{ uc` e`|ahg bo v{adm{qlnm{aoa`{ a| mvvnalmkn`
Agme`}pmu` |az` bo uc` |`uunagh umgi mge"b{ |npeh` vpdvaghlmvmlauq lmg agl{`m|` uc` ucalig`|| bo uc` |npeh` knmgi`umge |npeh` b`{onbx lmg bllp{ ep{agh v`mi onbx|
Das`e na}pb{ cm| u`ge`glq ub |cbx e`g|auq lp{{`gu mgeagu`{o`{` xauc |`vm{muabg bo |bnae| mge ucali`gagh bo |npeh`
Upk` mge vnmu` |`uun`{|
@ooala`glq bo |cmnnbx lnm{aoa`{| lmg k` adv{b`e kq uc`|`
|`u mu mg mghn` #?6! o{bd cb{azbgumn
Ag xm|u`xmu`{ u{`mud`gu u`ge ub lnbh o{bd kabnbhalmn
h{bxuc. h{`m|` mge |p|v`ge`e |bnae|
Umgi uqv`|: @auc`{ la{lpnm{ b{ {`lumghpnm{ umgi|
Bsaemuabg eaulc`| p|` agu{m$lcmgg`n lnm{aoa`{|
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La{lpnm{ umgi|
Uxb uqv`|: l`gu`{$o``e mge {ad$o``e uqv`|
Eamd u`{ a| < ub ?6 d #uqvalmn a| =6 ub 56 d! $ {meap||cbpne v{`o`{mknq k` > 0 uad`| bo uc` |ae` xmnn xmu`{ e`vuc
P|` {`bnagh d`lcmga|d ub u{mg|vb{u mge {`db` |npeh`o{bd uc` kbuubd
\npeh` dmq `auc`{ k` vnbx`e ub m l`gu{mn cbvv`{ ob{ {`dbmnb{ au a| {`db`e ea{`lunq o{bd uc` umgi kbuubd kq |pluabgb{aoal`|
[`dbmn a| auc`{ cqe{b|umualmnnq b{ kq vpdvagh
\`lbgem{q \`ead`gumuabg Umgi
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7/23/2019 Water and Wastewater Treatment: Secondary Sedimentation Tank
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[`lumghpnm{ umgi|
Dmsadpd n`ghuc > =6 uad`| uc` na}pae e`vuc #pv ub 16 d`u`{|x`{` mn|b p|`e!
Xaeuc |cbpne k` >?d #ao dpnuavn` |npeh` lbnn`luabg
d`lcmga|d| m{` p|`e uc`g pv ub ;5 d a| p|`e!U{m`n onahcu| b{ u{m`nagh k{aeh`| m{` p|`e m| |npeh`
lbnn`lub{|
\npeh` lmg k` lbnn`lu`e mu uc` agonp`gu b{ `oonp`gu `ge bo uc`umgi `{q nbgh umgi| lmg cm` uxb |`u| bo onahcu| mge
cm` m l`gu{mn cbvv`{ ub dagadaz` |npeh` u{mg|vb{uea|umgl`
M u{m`nagh k{aeh` dmq cm` |npeh` {`dbmn |q|u`d #m|l{mv`{ b{ m |pluabg dmgaobne! uc` |npeh` a| ea|lcm{h`eub m lbnn`luabg u{bphc {pggagh uc` n`ghuc bo uc` umgi
\`lbgem{q \`ead`gumuabg Umgi
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7/23/2019 Water and Wastewater Treatment: Secondary Sedimentation Tank
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Lnm{aoa`{ v`{ob{dmgl` a| moo`lu`e kq
Na}pae e`vuc
Agn`u e`|ahg
Uqv` bo |npeh` {`dbmn `}pavd`gu
\npeh` knmgi`u e`vuc
Na}pae e`vuc
\ae` xmnn na}pae e`vuc #ag lm|` bo {`lumghpnm{ umgi| e`vuc
mu uc` `oonp`gu `ge! Dagadpd
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Umgi agn`u e`|ahg
J`uuagh bo agonp`gu lmg agl{`m|` ob{dmuabg bo e`g|auqlp{{`gu| mge |lbp{agh bo |`uun`e |npeh`
Umgi agn`u |cbpne
ea||avmu` agonp`gu g`{hq ea|u{akpu` uc` onbx ``gnq ag cb{azbgumn mge `{ualmn ea{`luabg|
dauahmu` e`g|auq lp{{`gu|
dagadaz` |npeh` knmgi`u ea|up{kmgl`
v{bdbu` onbllpnmuabg
La{lpnm{ l`gu`{ o``e umgi| p|` lqnage{almn kmoon`|
Dagadpd eamd`u`{ a| ;0% bo umgi eamd`u`{ #uqvalmn
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X`a{vnml`d`gu mge nbmeagh
Ag nm{h`{ umgi| la{lpnm{ x`a{ u{bphc vnml`e mu ;" ;06 d
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Onbx ea|u{akpuabg Adkmnmgl`e ea|u{akpuabg lmg lmp|` pge`{$nbmeagh b{ b`{$
nbmeagh bo ageaaepmn pgau| mge moo`lu b`{mnn v`{ob{dmgl`
X`a{|. onbx ea|u{akpuabg kbs`|. onbx lbgu{bn mn`|.cqe{mpnal ea|u{akpuabg p|agh cqe{mpnal |qdd`u{q. mge o``e
hmu` b{ agn`u vb{u lbgu{bn| m{` p|`e
\lpd {`dbvmn
_`{q nauun` |lpd a| p|pmnnq ob{d`e ag |`lbgem{q lnm{aoa {|
\lpd {`dbmn dmq k` g``e`e xc`g v{adm{q lnm{aoa`{| m{`
gbu p|`e \lpd {`dbmn `}pavd`gu aglnpe` k`mlc mge |l{mvv`{
uqv`. {bumuagh vav`$uc{bphc |iadd`{. mge |nbuu`e vav`|
\lpd |cbpne gbu k` umi`g ob{ u{`mud`gu dal{bb{hmga|d|{`|vbg|akn` ob{ obmdagh xann k` {`lqln`e
\`lbgem{q \`ead`gumuabg Umgi