Structural Analysis
6th Edition
ISBN: 9781337630931
Author: KASSIMALI, Aslam.
Publisher: Cengage,
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How to determine the needed surface area of the secondary clarifier tank given that the flow is 40,000 m3 per day and the recycling ratio is 0.5 . The necessary solids concentration in the underflow is 13,000 mg/L, while the Mixed liquor suspended solids concentration in the activated sludge is 4,500 mg/L.
The table below shows the settling properties of sludge:
Mixed liquor suspended solids Mg/l |
Settling velocity m/hr |
2000 |
6 |
4000 |
3 |
6000 |
1 |
8000 |
0.2 |
10000 |
0.1 |
13000 |
0.1 |
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