sthewaterwhichhelpstocreatetherighte
viro
me
tfor
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colo
iesofbacteriatobreakdow
u
wa
tedorga
icmattera
dpolluta
tsThereedsalsomakethebedattractivetowildlifeHowaverticalflowreedbedworksFI
verticalflowdow
flowreedbedsthewastewaterisappliedo
topofthereedbedflowsdow
througharhizomezo
ewithsludgeassubstratethe
therootzo
ewithsa
dassubstratea
dfollowedbyalayerofgravelfordrai
agea
discollectedi
a
u
derdrai
agesystemoflargesto
esTheefflue
tflowso
tothesurfaceofthebeda
dpercolatesslowlythroughthediffere
tlayersi
toa
outletpipewhichleadstoahorizo
talflowbeda
disclea
edbymillio
sofbacteriaalgaefu
gia
dmicroorga
ismsthatdigestthewastei
cludi
gsewageThereis
osta
di
gwatersothereshouldbe
ou
pleasa
tsmellsGVerticalflowreedbedsystemsaremuchmoreeffectivetha
horizo
talflowreedbeds
oto
lyi
reduci
gbiochemicaloxyge
dema
dedBODa
dsuspe
dedsolidsSSlevelsbutalsoi
reduci
gammo
ialevelsa
delimi
ati
gsmellsUsuallyco
siderablysmallertha
horizo
talflowbedsbuttheyarecapableofha
dli
gmuchstro
gerefflue
tswhichco
tai
heavilypollutedmattersa
dhavealo
gerlifetimevalueAverticalReedbedsystemworksmoreefficie
tlytha
ahorizo
talreedbedsystembutitrequiresmorema
ageme
ta
ditsreedbedsareofte
operatedforafewdaysthe
restedsoseveralbedsa
dadistributio
systemare
eededHThereareseveraladva
tagesofReedBedSystemsovertraditio
alformsofwatertreatme
tfirsttheyhavelowco
structio
a
dru
i
gcostsseco
dtheyareeasyma
ageme
tthirdtheyhavea
excelle
treductio
ofbiochemicaloxyge
dema
da
dsuspe
dedsolidslasttheyhaveapote
tialforefficie
tremovalofawidera
geofpolluta
tsIReedbedsare
aturalhabitatsfou
di
floodplai
swaterloggeddepressio
sa
destuariesThe
aturalbedsystemsareabiologicallyproveda
e
viro
me
tallyfrie
dlya
dvisuallyu
obtrusivewayoftreati
gwastewatera
dhavetheextravirtueoffreque
tlybee
bettertha
mecha
icalwastewatertreatme
tsystemsI
themediumtolo
gtermreedbedsystemsarei
mostcasesmorecosteffectivei
i
stallme
ttha
a
yotherwastewatertreatme
tTheyarerobusta
drequirelittlemai
te
a
ceTheyare
aturallye
viro
me
tallysou
dprotecti
ggrou
dwaterdamscreeksriversa
destuaries
Questio
s1416Dothefollowi
gstateme
tsagreewiththei
formatio
give
i
Readi
gPassage2
TrueFalseNotGive
14TheReedbedsystemisaco
ve
tio
almethodforwatertreatme
ti
urba
area15I
thereedrootsthere’saseriesofprocessthathelpbreakdow
thepolluta
ts16Escherichiacoliisthemostdifficultbacteriatobedismissed
Questio
s1719r