nutrient removal project mellie-mel tan johnbwai kim joey t
Post on 21-Dec-2015
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Effect of Mixed Liquor Volatile Suspended Solids (MLVSS) Concentration on B.O.D. Removal
• D.O. consumption as indicator • Settle time as variable• MLVSS Concentration Tests
D.O. levels give uptake rate
Time integral = total B.O.D. consumed
Waste C.O.D. known
Ratio observed to known = efficiency
Dissolved Oxygen As Indicator
Settle time as variable
Figure : Efficiency versus Settle Time
Third and Fourth
Second
First
FirstSecond
Third
Fourth
Fifth
Sixth
0.0%
20.0%
40.0%
60.0%
80.0%
100.0%
120.0%
0 1000 2000 3000 4000 5000 6000 7000
Settle Time (s)
Effic
ienc
y
0 1000 2000 3000 4000 5000 6000
Settle Time
100 %
Eff
icie
ncy
MLVSS Concentration Tests
Figure : Efficiency vs Concentration
0%
20%
40%
60%
80%
100%
120%
140%
0 500 1000 1500 2000 2500 3000MLVSS Concentration (mg/L)
Eff
icie
ncy
Summarizing The Strange
Oscillating DO acquisition Steadily decreasing D.O. values Missing samples Kv,l anyone?
The Bermuda
Triangle of
Concentration
Samples