aeration ppt

7/25/2019 Aeration Ppt

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AERATION


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hat is Aeration?

airremove

modify

water


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does Aeration Work?

Aeration brings water and air inclose contact by :

exposing drops or thinsheets of water to the air

introducing small bubblesof air and letting them risethrough the water


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Treatment

crubbing Oxidation


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Primary application of aerationin water treatment:

!Removal of dissolved gases"onstituents commonly a#ected by

aeration are:$ "arbon dioxide% &ethane%'olatile organics% taste ( odor

causing volatile compounds%)ydrogen sul*de

!oxygenation of water

!Removal of iron and manganese


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"arbon +ioxideExcessive amounts of carbondioxide ,above -./- mg012 in rawwater can cause three operating

problems: Increases the acidity of thewater

Tends to 3eep iron in solution

tituents commonly afected

tion


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tion&ethane

highly 4ammable andexplosive tends to ma3e the water

taste li3e garlic


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tion'olatile organics and taste ( odorcausing volatile compoundsVOCsare organic chemicals that havea high vapor pressure atordinary room temperature and some:

are dangerous to human health can cause harm to the environment


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tion)ydrogen sul*de"an cause:

6oisoning

Rotten.egg odorerious operational problems when

the water contains even smallamounts of hydrogen sul*de:

+isinfection become less

e#ective


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oval o iron and manganese

idation"


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Primary application of aeration

in waste water treatment:

!To supply oxygen to aerobic

biological treatment processes!Air stripping to remove toxic

volatile organics!Air stripping to remove volatilecompounds


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O!ygen #u$$ly

oxygen

needed by bacteria

biodegradation

aeration

provides oxygenbacter

ia

bacteria

utili7e oxygenbrea3down organic

matters


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Air stri$$ing process of moving air through

contaminated water in an above.groundtreatment system removes chemicals called 8volatile

organic compounds9 or 8'O"s9

'O"s can changefrom li;uid to gas

thereforeeasily

evaporates

passing air aids and hastensevaporation


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T


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Water%&nto%Air Aerators

"ascade Aerators


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"one Aerators


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lat and "o3e Aerators


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+raft Aerators


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pray Aerators


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Air%&nto%Water Aerators

6ressure Aerators

=INE >?>>1E "OARE >?>>1E


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Air%&nto%Water Aerators

"entrifugal Aerators


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O'(RA)&*+

CO*#&,(RA)&O*#-

"orrosion

=alse "logging of =ilters,Air >inding2

low Removal of

)ydrogen ul*de


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)HR(( .A#&C CO*)RO/

)(#)# AR( R(01&R(, 2ORA(RA)&O*-

+issolved oxygen

p)

Temperature

aeration ppt

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