Loc 2 Wastewater

7/21/2019 Loc 2 Wastewater

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LOC 2

Wastewater Treatment


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WATER : THE MOST PRECIOUS

NATURAL RESOURCE

Without this seemingly invaluale !om"oun#$ li%e on

ea&th 'oul# have een non(e)istent

The nee# to maintain !lean 'ate& %o& oth humans an#

animals has e!ome a ma*o&$ even a !&iti!al !on!e&n


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MORE THAN ++ , O- THE EARTH.S WATER IN ITS

NATURAL STATE IS UNA/AILA0LE OR UNA/ITA0LE

-OR HUMAN USE

THUS$ THE AMOUNT O- WATER -OR ALL THEPEOPLE$ PLANTS AN1 ANIMALS COMPETE IS MUCH

LESS THAN 2 , O- THE TOTAL


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WATER SOURCES CAN BROADLY BE

CLASSSIFIED INTO TWO TYPES :i3 SUR-ACE WATER

AN4 WATER 0O14 WHICH IS -OUN1 -LOWIN5 OR

STAN1IN5 ON THE SUR-ACE$ SUCH AS STREAMS$

RI/ERS$ PON1S$ LA6ES AN1 RESER/OIRS

ii3 5ROUN1 WATER

UN1ER5ROUN1 WATER 0EARIN5 LA4ERS O-

POROUS ROC6S THROU5H WHICH WATER CAN -LOW

A-TER IT HAS PASSE1 THROU5H THE UPPER LA4ERS O-

SOIL7


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Water is utilized primaril !"r t#ree ma$"r

a%ti&ities :

I'dustrialD"mesti%

A(ri%ultural

)ater )#e' utilized !"r t#e a*"&e a%ti&ities+ results

i' )ater %"'tami'ati"' , p"lluti"' )#i%# is a ma$"r

issue i' t"da-s %"'te.t


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W/ERE DOES POLLUTION CO0ES

FRO0 1S"ur%es "! )ater p"lluti"' %a' *e %ate("rised i't" t)" ma$"r tpes :

i2 p"i't s"ur%e p"lluti"'

p"lluti"' t#at e'ters t#r"u(# pipes+ se)ers "rdit%#es !r"m spe%i!i% sites su%# as !a%t"ries "r

se)a(e treatme't pla'ts

3 e(4 t#e e.."' &aldez "il spill i' 5676


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ii2 '"' p"i't s"ur%e p"lluti"'

als" %alled p"lluted ru'"!! %aused * la'd p"lluta'ts t#at e'ters

*"dies "! )ater "&er lar(e areas rat#er t#a' at si'(le p"i't

e(4 a(ri%ultural ru'"!!3 mi'i'( )astes

3 mu'i%ipal )astes

3 %"'stru%ti"' sedime'ts


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Waste)ater Treatme't

Purp"se:

T" ma'a(e )ater dis%#ar(ed !r"m #"mes+*usi'esses+ a'd i'dustries a'd t" redu%e t#e

t#reat "! )ater p"lluti"'4


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WASTE WATER

0"st e!!lue'ts are #eter"(e'"us+ %"'tai' diss"l&ed

a'd suspe'ded matters 8 "r(a'i% "r i'"r(a'i%4

Treatme't i'&"l&es rem"&al "! %"'tami'a'ts4


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Pre9treatme't

Prelimi'ar treatme'tPrimar treatme't

Se%"'dar treatme't Slud(e *i"s"lids2 disp"sal



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Pre9treatme't

9 O%%urs pri"r t" dis%#ar(e 9 Pre&e'ti"' "! t".i% %#emi%als "r e.%ess

'utrie'ts *ei'( dis%#ar(ed i' )aste)ater


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Water dis%#ar(ed !r"m #"mes+ *usi'esses+

a'd i'dustr e'ters sanita&y se'e&s

Water !r"m rai')ater "' streets e'ters

sto&m 'ate& se)ers

C"m*i'ed se)ers %arr *"t# sa'itar)astes a'd st"rm )ater


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Water m"&es t")ard t#e )aste)ater pla't

primaril * (ra&it !l")

Li!t stati"'s pump )ater !r"m l") li'( areas

"&er #ills


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Prelimi'ar Treatme't

9 rem"&es lar(e "*$e%ts a'd '"'9de(rada*lematerials9 pr"te%ts pumps a'd e;uipme't !r"m dama(e

9 < p#ases : a& s!&een a'd g&it !hame&


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Bar S%ree's:

T" rem"&e sti%=s+ r"%=s+ l"(s+ s#"es+ dead

a'imals4

>rit Rem"&al:

(rit %auses u'due )ear d")'stream u'itpr"%esses

Wastewater Treatment

Preliminary Treatment


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Bar S%ree'

9 %at%#es lar(e "*$e%tst#at #a&e ("tte' i't"se)er sstem su%# as*ri%=s+ *"ttles+ pie%es "!

)""d+ et%4


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>rit C#am*er

9 rem"&es r"%=s+ (ra&el+ *r"=e' (lass+ et%40es# S%ree'

9 rem"&es diapers+ %"m*s+ t")els+ plasti% *a(s+

sri'(es+ et%4


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Prelimi'ar Treatme't:

S%ree's

Bar S%ree's

Bar Ra%=s


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Prelimi'ar Treatme't


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0easureme't a'd sampli'( at t#e i'letstru%ture

9 a !l") meter %"'ti'u"usl re%"rds t#e&"lume "! )ater e'teri'( t#e treatme't pla't

9 )ater samples ta=e' !"r determi'ati"' "!

suspe'ded s"lids a'd B4O4D4


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Sus"en#e# Soli#s 8 t#e ;ua'tit "! s"lidmaterials !l"ati'( i' t#e )ater %"lum'

07O717 8 0io!hemi!al O)ygen 1eman#

9 a measure "! t#e am"u't "! ".(e' re;uired

t" aer"*i%all de%"mp"se "r(a'i% matter i't#e )ater


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0easureme'ts "! Suspe'ded S"lids a'dB4O4D4 i'di%ate t#e e!!e%ti&e'ess "!

treatme't pr"%esses

B"t# Suspe'ded S"lids a'd B4O4D4de%rease as )ater m"&es t#r"u(# t#e

)aste)ater treatme't pr"%esses


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Primar Treatme't

99 a p#si%al pr"%ess99 )aste)ater !l") is sl")ed d")' a'd suspe'deds"lids settle t" t#e *"tt"m * (ra&it

99 t#e material t#at settles is %alled slu#ge o&iosoli#s

9 sedime'tati"'+ %#emi%al %"a(ulati"'+ "&e!i"itation8 rem"&e %"arse a'd !i'e suspe'ded s"lids4


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Primar Treatme't


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Primar Treatme't


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Primar Treatme't


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Slud(e !r"m t#e primar sedime'tati"' ta'=s ispumped t" t#e slud(e t#i%=e'er4

9 m"re settli'( "%%urs t" %"'%e'trate t#e slud(epri"r t" disp"sal



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Primar treatme't redu%es t#e suspe'ded s"lids

a'd t#e B4O4D4 "! t#e )aste)ater4

Fr"m t#e primar treatme't ta'=s )ater ispumped t" t#e tri%=li'( !ilter !"r se%"'dar

treatme't4

Se%"'dar treatme't )ill !urt#er redu%e t#esuspe'ded s"lids a'd B4O4D4 "! t#e )aste)ater4


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Waste)ater Treatme'tSe%"'dar Treatme't

S d T t t


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Se%"'dar Treatme't

Secondary treatment is a biological process

Removal of colloidal and DO substances

Utilies bacteria and algae to metabolieorganic matter in t!e wastewater"

#rinciples of biodegradation and biosorption


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SECONDARY TREAT0ENT

Pri'%ipal re;uireme'ts :

Ade;uate suppl "! mi%r"*es

C"'ta%t )it# e!!lue'tsO.(e' a&aila*ilit


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Se%"'dar treatme't is usuall %arried "ut i' a

*i"rea%t"r 8 s#"rte's treatme't time+ ma'ipulati"' "!

t#e pr"%ess4

C"'&e'ti"'al sstem 8 < mai' pr"%esses

i2 Fluidized "r suspe'ded mi%r"*ial %ulture

9 a%ti&ated slud(e pr"%ess

i2 Film9!l") sstem9 tri%=li'( !ilter

9 r"tati'( *i"l"(i%al %"'ta%t"r RBC 2


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ACTI?ATED SLUD>E PROCESS

Aer"*i% pr"%ess

Or(a'i% matter is *r"u(#t i' %"'ta%t di&erse

mi%r"*es i' t#e prese'%e "! a me%#a'i%al aerat"r4

0i%r"*es are a((l"merated i' t#e !"rm "! !l"%s

!l"%ula't suspe'si"' %ulture 2 8 separate %ells !r"m

treated li;uid4

C"'ti'u"us i'"%ulati"' "! aerated %ulture )it#

mi%r"*es


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T#e pr"%ess %"'sists "! :

A' aerati"' ta'=

S"lid9li;uid separat"r

Re%%li'( slud(e pumps

A%ti&ated slud(e 8 6@ *a%teria a'd @ #i(#er mi%r"*es


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A%ti&ated slud(e

mi.ed %"mmu'it "! mi%r""r(a'isms

B"t# aer"*i% a'd a'aer"*i% *a%teria ma e.ist

Bi"l"(i%al !l"% is !"rmed


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Waste)ater a!ter primar treatme't e'ters t#e aerati"'

ta'=

Aerati"' ta'= 8 "r(a'i% matter is *r"u(#t i' %"'ta%t

)it# t#e slud(e !r"m se%"'dar %lari!ier 2

E!!lue't !r"m aerati"' ta'= is separated i' a settli'(

ta'= , se%"'dar %lari!iers

Settli'( ta'=,se%"'dar %lari!iers 8 separated slud(ee.ists )it#"ut %"'ta%t )it# t#e "r(a'i% matter a'd

*e%"mes a%ti&ated4


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@ p#si%al %"mp"'e'ts "! a%ti&ated slud(e

pr"%ess

aerati"' ta'=

".(e' is i'tr"du%ed i't" t#e sstem


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aerati"' s"ur%e

e'sure t#at ade;uate ".(e' is !ed i't" t#e ta'=

pr"&ided pure ".(e' "r %"mpressed air


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se%"'dar %lari!iers

a%ti&ated9slud(e s"lids separate !r"m t#e surr"u'di'()aste)ater


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A%ti&ated slud(e "ut!l")

li'e

Pump a%ti&ated slud(e

*a%= t" t#e aerati"' ta'=E!!lue't "ut!l") li'e

dis%#ar(ed e!!lue't i't" *a

"r tertiar treatme't pla't


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ACTI?ATED SLUD>E PROCESS

E!!lue't !r"m t#e aerati"' ta'= %"'ta'i'( slud(e

!l"%%ula't mi%r"*ial *i"mass 2 is separated i' a settli'(

ta'=

Separated slud(e *e%"mes a%ti&ated4

A%ti&ated slud(e is re%%led i' t#e aerati"' ta'= as a

seed "r i'"%ulum

/i(# O< le&els mai'tai'ed * me%#a'i%al aerati"' "r*u**li'( t#r"u(# r"tati'( paddles

Slud(e usuall disp"sed as !ertilizer


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La(""' Sstems#"ld t#e )aste9)ater !"r se&eral m"'t#s

'atural de(radati"' "! se)a(eUsuall reeds are pre!erred


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T&eatment stages 9 Te&tia&y t&eatment

rem"&e disease9%ausi'( "r(a'isms !r"m

)aste)ater

di!!ere't disi'!e%ti"' pr"%ess

C#l"ri'ati"'

U? li(#t radiati"'

Oz"'ati"'


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C#l"ri'ati"'

0"st %"mm"'

Ad&a'ta(es: l") %"st

e!!e%ti&e

Disad&a'ta(es:

%#l"ri'e residue %"uld

*e #arm!ul t"

e'&ir"'me't


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U? li(#t radiati"'

Dama(e t#e (e'eti%stru%ture "! *a%teria+ &iruses

a'd "t#er pat#"(e's4

Ad&a'ta(es: '" %#emi%als

are used

)ater taste m"re 'atural

Disad&a'ta(es: #i(#

mai'te'a'%e "! t#e U?9lamp


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Oz"'ati"'

O.idized m"st pat#"(e'i% mi%r""r(a'isms

Ad&a'ta(es: sa!er t#a' %#l"ri'ati"'

!e)er disi'!e%ti"' *9pr"du%t

Disad&a'ta(e: #i(# %"st


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W#at %a' e!!lue't use !"r1

dis%#ar(ed i't" a stream+ ri&er+ *a+ la(""' "r

)etla'd

used !"r t#e irri(ati"' "! a ("l! %"urse+ (ree' )a "r

par=

I! it-s su!!i%ie'tl %lea'+ it %a' *e used !"r

(r"u'd)ater re%#ar(e


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Ad&a'%ed Treatme't

Nitr"(e' rem"&al

Amm"'ia N/B2 'itrite NO


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Slud(e treatme't

Primar slud(e usuall #a&e str"'( "d"rs

Se%"'dar slud(e #a&e #i(# %"'%e'trati"' "!

mi%r""r(a'ism

>"als "! treatme'ts are:

Redu%e "d"rs

Rem"&e )ater redu%e &"lume

De%"mp"se "r(a'i% matter


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U'treated slud(e are a*"ut 6 per%e't )ater

Settli'( %a' redu%e a*"ut 6< t" 6 per%e't "! )ater

dried slud(e is %alled a slud(e %a=e


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di!!ere't slud(e treatme'ts

Aer"*i% di(esti"'

A'aer"*i% di(esti"'

%"mp"sti'(


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Aer"*i% di(esti"'

Ba%terial pr"%ess

Need ".(e'

C"'sume "r(a'i% matterC"'&ert i't" %ar*"' di".ide CO


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A'aer"*i% di(esti"'

Ba%terial pr"%ess

D" '"t re;uire ".(e'

C"'sume "r(a'i% matter

Pr"du%e *i"(as+ )#i%# %a' *e used i' (e'erat"rs

!"r ele%tri%it

C ti


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C"mp"sti'(

aer"*i% pr"%ess

re;uires t#e %"rre%t mi.

"! %ar*"'+ 'itr"(e'+".(e' a'd )ater )it#

slud(e

>e'erate lar(e am"u't

"! #eat

Sl d di l


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Slud(e disp"sal

Super#eat slud(e a'd %"'&ert i't" small (ra'ules

t#at are ri%# i' 'itr"(e'

Sell it t" l"%al !armer as !ertilizer

Spread slud(e %a=e "' t#e !ield

Sa&e la'd!ill spa%e

S


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Summar


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Loc 2 Wastewater

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