Sewage and Effluent Treatment Presentation Taster (1).ppt

8/11/2019 Sewage and Effluent Treatment Presentation Taster (1).ppt

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Sewage and EfuentTreatment

2-4 November 2002

Sen Moran

-The rst ew slides


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a! "ne# 2 November

2002"verview# $astewater Engineering

$astewater %hara&teristi&s

$astewater Treatment %onsiderations"verview# $astewater Treatment'lant esign

'h!si&al( %hemi&al and )iologi&al'ro&esses


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"verview# $astewaterEngineering

$astewater Treatment Wastewateris the water used b! a

&ommunit! %olle&ted and treated *rior to dis&harge Standards o treatment var! but are

generall! be&oming more stringentTreatment is a *ro&ess o removal o

smaller and smaller *arti&les


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"verview# $astewater

EngineeringSludge Treatment Sludgesare the *rodu&t o biologi&al

treatment o wastewater Sludges &om*rise solids ound inwastewater *lus organisms used in thetreatment *ro&ess

is*osal is a ma+or issue ,arious dis*osal te&hniues are used butea&h has advantages and disadvantages


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"verview# $astewater

Engineering$ater is*osal and .e-/se $astewater treatment generates a

Cleaned Water Stream %leaned water is oten dis&harged to

a larger bod! o water or dilution

lternativel!( &leaned water m! be re-used or irrigation or rarel! drin1ingwater *rodu&tion


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$astewater

%hara&teristi&s %hara&teristi&s are normall! estimated

b! em*iri&al methods

$astewater lows lows arise rom households( industr!(

inltration and storm 3ows lows are &onsidered in both

h!drauli& and *ro&ess design evels o treatment ma! var! or

di5erent 3owrates


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$astewater

%hara&teristi&s$astewater lowsThere is a variet! o methods or

estimating 3owrates 6owever there ma! be great variabilit!

in the a&tors whi&h a5e&t 3owratesrom region to region

i5erent multi*les o the r! $eatherlow will re&eive ea&h level otreatment


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$astewater

%hara&teristi&s$astewater %om*osition 7e! design issues#

Solids# densit!( *arti&le si8e( level o,olatile Sus*ended Solids

)io&hemi&al "9!gen emand

Tem*erature

mmoniaNutrient levels


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$astewater

%hara&teristi&s$astewater Treatment%onsiderations

"b+e&tive# to maintain or im*rove theualit! o the re&eiving bod! o water

Treatment stages#'reliminar!

'rimar!

Se&ondar!

Tertiar!


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$astewater

%hara&teristi&s%lassi&ation o Methods

'h!si&al

'ro&esses

%hemi&al

'ro&esses

)iologi&al

'ro&esses

S&reening

Sedimentation

iltration

're&i*itation

%hlorination

erobi&

naerobi&


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$astewater

%hara&teristi&s**li&abilit! and Sele&tion oMethods

i5erent *ro&esses are used to treatwastewater de*ending on the&ontaminants *resent

Similarl!( di5erent *ro&esses are usedto treat sludges( de*ending on theob+e&tive o treatment


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"verview# $astewaterTreatment 'lant esign

lowrate and Mass oading $astewater eed is not s*e&ied( thereore

the *lant must be able to treat whatever thewastewater &ontains 'lant design will ta1e a&&ount o histori&al

3ows and loadings( but must also be able todeal with e9*ansion

'lant must also be able to deal with a rangeo 3ow and load &onditions( *lus *ea1u*stream 3ow &onditions :eg storms;


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Sele&tion o esign lowrates omesti based on a 3ow *er headE9ltration# based on a ? o

the domesti& 3ow 'ea1ing a&tors# e*ends on si8e o

&ommunit!


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Sele&tion o esign lowrates /*stream low Eualisation

'lants are not normall! designed to treattotal *ea1 arisings

=nstead( h!drauli& &ontrols will dire&t3ows above *lant &a*abilities to storm

s!stem on larger wor1s


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/7 ma9imum 3ow to treatment *lant isdetermined b! ormula #

ormula @ 'ABEB=BCD0'B2E l>d

'@*o*ulation

A@average dail! &onsum*tion *er head l>h>dE@=ndustrial F &ommer&ial dis&harges to sewer l>d

=@inltration l>d


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or larger wor1s with storm tan1s( onl!Gull Treatment lowH :T; will re&eiveull treatment

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Sewage and Effluent Treatment Presentation Taster (1).ppt