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Wastewater Treatment

Treatment depends on threefactors:1) Slow water down - removes

larger particles2) Aerobic decomposition oforganic material

3) Destro pathogens !diseaseca"sing bacteria)

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#at"ral Stream sstems

self-p"rifSlow Down $ meander!winding)% roc&s and wood

debris in stream% goodriparian 'oneAerobic Decomposition

$ nat"ral bacteriadecompose organic material( eno"gh dissolved o*gen

is resent in the water

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Treatment of+rban Drin&ing

Water andWastewater is

designed to mimicthe nat"ral self-

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./-A0 Water and +Wasterwater 4lants

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5*tensiveimpervio"s

s"rfaces ofe*ington

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 Town Branch Wastewater TreatmentPlant

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W. Hickman Wastewater TreatmentPlant

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KY-AM Water Treatment Plant

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Aerobicdecompositi

on in soil

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Slow% settle and

separate

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Constructed Wetland Sewage Treatment

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wter

Treatment

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Screened to

remo!elargede'risandsand

Settling Tanks ,

slowsdownwater

ActivatedSl"dgeTan&s

AerobicDigestion

Destro4athogens:

hlorination

+6 ight7'one

Aerationbefore

sending

bac& tostream

58"ent

Anaerobic

Digestion

0ethane

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4rimarSettlingTan&s

ActivatedSl"dgeTan&s

Aerationand

hlorination

58"ent

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WaterTreatmen

t

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Water Treatment

1) Water p"mped from river

2) oes into settling tan&s $removes sand% silt and cla!chemicals ma be added tohelp cl"mp particles)3) learwater 9ows over

activated charcoal% gravel andsand ,lters) Ammoni"m hloride addedto &ill pathogens

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Chemical Tests $or Waterualit"

 Tem+erature a/ects .0. , higher# less .0.+H Measures i$ water is acidic or 'asic ,most li!ing things need to 'e near neutral

Conducti!it" Measures the dissol!ed ions inthe water , not what is there# 'ut howmuch.issol!ed 01"gen %.0.& Measures the

amount in ++m , 'est i$ around 2 , 34 ++m$or most li!ing things

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0ther Tests5

6itrates and Phos+hates $ound in $ertili7ers Tur'idit" Measures amount o$ sus+ended+articles , streams usuall" tur'id a$terhea!" rains# 'ut clear u+ as water slowsdown. *ood $or +onds and lakes.Bacteria Tests *ood 'ut not eas" to do