Answered: Using the data presented below, compute…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Solid removal efficiency in a primary settling tank has been measured as %30 which is very low value. Jar tests showed that if 120 mg/L FeCl 3 is added into the wastewater, the solid removal efficiency will be around 75%.

Using the data presented below, compute the total amount of sludge produced daily in the primary settling tank in terms of mass and volume.

Wastewater flow rate: 8.000 m3 /day
Total solid concentration: 300 mg/L
Solid content of sludge: 4 %
Specific gravity of sludge: 1,02

Molecular Weights (g/mole);
Ca:40 – C:12 – O:16 – H:1 – S:32
– Al:27 – Fe:56 - Cl:35,5 – P:31

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