Wastewater Treatment. Moorestown Wastewater Treatment Plant.
Wastewater Treatment Blanks
Transcript of Wastewater Treatment Blanks
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WastewaterTreatment
CE 326 Principles of Environmental
EngineeringProf. Tim Ellis
Spring 2008
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Wastewater generationTABLE 1Typical wastewater flowrates from various sources
Flow, L/unit - d
Source Unit an!e Typical
Airport Passenger 8-15 11
Cabin, resort Person 30-190 150
Cafeteria Customer 4-11 8
Employee 30-45 38
Campground de!eloped" Person #5-150 115
Co$%tail lounge &eat 45-95 #5
Coffee s'op Customer 15-30 (3
)ormitory, bun%'ouse Person #5-190 150
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Collection Systems
Separate sewers Combined sewers
Combined sewer overflowsCombined sewer overflows
P'oto $ourtesy of *ater En!ironment +ederation Colle$tion &ystems Committee $. &ub$ommittee
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Regulationse!eral Water Pollution Control "egislation#
$S
Refuse Act of 1899
Water PollutionControl Act of 1948
Federal Water PollutionControl Act of 19!
Amendments tot"e FWPCA of 19!1
Water #ualityAct of 19!
Clean Water Restoration
Act of 19!!
Federal Water PollutionControl Act Amendmentsof 19$%&Clean Water Act'
Clean Water %ct of 19$$
(unicipal Wastewater )reatmentConstruction *rant Amendments of 1981
Water &ualit' %ct of 198$
+cean ,umping -anAct of 1988
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. n / u e
n t
1' Preliminary
)reatment
%' Primarysedimentation 0' -iological
ProcessCon2ersion tosettleable solids
4' Secondarysedimentation
' Sludge solids tofurt"ertreatment anddisposal
' Sludge solids tofurt"er
treatment anddisposal
R e c e i 2 i n g w
a t e r
Wastewater Treatment
Process steps
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our levels of wastewater treatme
P333333333333333 Screens
*rit remo2al
P333333333333333 Solids settling
S333333333333333
-iological treatment Settling of biological solids
)33333333333333
Filtration
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Screens
stics5 rocs5 logs5 s"oes5 deadanimals5 etc6
*rit Remo2al
grit causes undue weardownstream unit processes
Wastewater Treatment
Preliminary )reatment
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Preliminary )reatmentScreens -ar Screens -ar Racs
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Preliminary )reatmentgrit remo2al
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Secondary )reatment
(iological treatmentClassi)cation of
microorganisms *' t+eir
c,,,,,, an! e,,,,,, source.
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Secondary )reatment
73333333333333333 tilie organic matter to supply t"eir
carbon and energy needs6
)"ese are t"e predominant organisms
in biological wastewater treatmentplants5 responsible for con2ertingorganic pollutants to carbon dio:ide5
water5 and additional "eterotrop"ic biomass6
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Secondary )reatment
A3333333333333333 get t"eir energy from an inorganic
source and t"eir carbon from carbon dio:ide6
An e:ample of autotrop"s inwastewater treatment is nitrifyingbacteria6
;itri
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-iological )reatment
Classi)cation ofmicroorganisms *' t+eirt,,,,,,,,,, e,,,,,,,,,,
a,,,,,,,,,,
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Terminal electronacceptor
%,,,,,,,,,,,-microorganisms transfer electrons from
t"e energy source to o:ygen5 +%6
.n t"e process o:ygen and organic
matter is con2erted to carbon dio:ide5C+%5 and water5 7%+6
+:ygen is termed t"e terminal electronacceptor or )=A6
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Terminal electronacceptor
%,,,,,,,,,,,-microorganisms utilie some ot"er
o:idied compound to acceptelectrons6
.n t"e case of denitrifyingmicroorganisms5 nitrate5 ;+0>5 ser2es
as t"e )=A5 as nitrate is con2erted tonitrogen gas5 ;%
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Terminal electronacceptor
%,,,,,,,,,,,-utilie C+% and organic compounds as
terminal electron acceptors6
.n t"is process5 organic compounds are
con2erted to fermentation productsand carbon dio:ide6
.n anaerobic digestion of wastewatersolids5 t"e fermentation products are
con2erted to met"ane5
C745
and carbon dio:ide
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)erminal =lectron Acceptor&)=A'
Pro$ess /EA Predominant 0ea$tions E1ample
Aerobi$
Aerobi$
Ano1i$
Anaerobi$
.(
.(
2.3-
C.(
organi$ matter .( C.( (.
23 .( 2.3-
organi$ matter 2.3- 2( C.( (.
organi$ matter C4 C.( (.
C5.) remo!al
nitrifi$ation
denitrifi$ation
anaerobi$ digestion
=:amples