Upload
jade-louise-patolilic
View
231
Download
0
Embed Size (px)
Citation preview
7/25/2019 Aeration Ppt
1/23
AERATION
7/25/2019 Aeration Ppt
2/23
hat is Aeration?
airremove
modify
water
7/25/2019 Aeration Ppt
3/23
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
7/25/2019 Aeration Ppt
4/23
Treatment
crubbing Oxidation
7/25/2019 Aeration Ppt
5/23
Primary application of aerationin water treatment:
!Removal of dissolved gases"onstituents commonly a#ected by
aeration are:$ "arbon dioxide% ðane%'olatile organics% taste ( odor
causing volatile compounds%)ydrogen sul*de
!oxygenation of water
!Removal of iron and manganese
7/25/2019 Aeration Ppt
6/23
"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
7/25/2019 Aeration Ppt
7/23
tituents commonly afected
tionðane
highly 4ammable andexplosive tends to ma3e the water
taste li3e garlic
7/25/2019 Aeration Ppt
8/23
tituents commonly afected
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
7/25/2019 Aeration Ppt
9/23
tituents commonly afected
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
7/25/2019 Aeration Ppt
10/23
oval o iron and manganese
idation"
7/25/2019 Aeration Ppt
11/23
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
7/25/2019 Aeration Ppt
12/23
O!ygen #u$$ly
oxygen
needed by bacteria
biodegradation
aeration
provides oxygenbacter
ia
bacteria
utili7e oxygenbrea3down organic
matters
7/25/2019 Aeration Ppt
13/23
Air stri$$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
7/25/2019 Aeration Ppt
14/23
T
7/25/2019 Aeration Ppt
15/23
Water%&nto%Air Aerators
"ascade Aerators
7/25/2019 Aeration Ppt
16/23
Water%&nto%Air Aerators
"one Aerators
7/25/2019 Aeration Ppt
17/23
Water%&nto%Air Aerators
lat and "o3e Aerators
7/25/2019 Aeration Ppt
18/23
Water%&nto%Air Aerators
+raft Aerators
7/25/2019 Aeration Ppt
19/23
Water%&nto%Air Aerators
pray Aerators
7/25/2019 Aeration Ppt
20/23
Air%&nto%Water Aerators
6ressure Aerators
=INE >?>>1E "OARE >?>>1E
7/25/2019 Aeration Ppt
21/23
Air%&nto%Water Aerators
"entrifugal Aerators
7/25/2019 Aeration Ppt
22/23
O'(RA)&*+
CO*#&,(RA)&O*#-
"orrosion
=alse "logging of =ilters,Air >inding2
low Removal of
)ydrogen ul*de
7/25/2019 Aeration Ppt
23/23
)HR(( .A#&C CO*)RO/
)(#)# AR( R(01&R(, 2ORA(RA)&O*-
+issolved oxygen
p)
Temperature