figure by mit ocw
TRANSCRIPT
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Figure by MIT OCW.
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GAC Tank
Source: Metcalf & Eddy Inc. Wastewater Engineering: Treatment, Disposal, Reuse. McGraw-Hill, New York, 1979.
2 to
3 m
Neva clogscreen
4 to
5 m
Surface wash
Carbon bed surface
25 mm sampling taps
Carbon discharge
Carbon chargeWash water
Effluent
Influent
Backwash
Backwash
Bolt ring
Full open cover with porthole
1 to 2 m
}
Figure by MIT OCW.
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GAC Breakthrough
Cb
Volume of Water Treated, V
Typical Breakthrough Curve for Activated Carbon
Efflu
ent S
olut
e C
once
ntra
tion
ClCi C2 Cb
Py
δ
Vb
Exhaustion
Vx
δδ < δ
Source: Metcalf & Eddy Inc. Wastewater Engineering: Treatment, Disposal, Reuse. McGraw-Hill, New York, 1979.
Figure by MIT OCW.
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0 2 4 6 8 10 12 14 pH
-1.00
-0.50
0.00
0.50
1.00
1.40
FeOH2+
Fe(OH)2+
Fe(OH)3(s)
FeCO3(s)
Fe3+
Fe2+E H , v
-7M or 5.6 µ 42, CO2 3
- oC, and Pressure of 1 atm.
Water Oxidized
Water Reduced
Forms of Iron in Water as Function of Redox Potential Versus pH Constructed with Total Iron Activity 10g/L, 96 mg/L SO Species at 1000 mg/L HCO , Temperature at 25
Figure by MIT OCW. Adapted from: MWH, J. C. Crittenden, R. R. Trussell, D. W. Hand, K. J. Howe, and G. Tchobanoglous.Water Treatment: Principles and Design. 2nd ed. Hoboken, NJ: John Wiley & Sons, 2005, p. 1571.
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+1.2
+1.6
E H , v
Water Reduced
Water Oxidized
0 2 4 6 8 10 12 14
-1.6
-1.2
-0.8
-0.4
+0.4
+0.8
0
Mn2+
MnO4 -
MnO2(s)
Mn2O3(s)
Mn3O4(s)
[Mn]total = 10-6 M Mn(OH)2(s)
Mn(s)
pH
25oC. Forms of Manganese in Water as Function of Redox Potential Versus pH at a Water Temperature of
Figure by MIT OCW. Adapted from: MWH, J. C. Crittenden, R. R. Trussell, D. W. Hand, K. J. Howe, and G. Tchobanoglous.Water Treatment: Principles and Design. 2nd ed. Hoboken, NJ: John Wiley & Sons, 2005, p. 1579.
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