Answered: Given a settling tank operating at 80%…

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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Question

Given a settling tank operating at 80% TSS removal efficiency, an inflow of 0.5 m³/s, and an influent concentration of 100 mg/L. Assuming steady state operations, at what flow would operators have to remove sludge in order to achieve a TSS concentration of 1500 mg/L in the sludge?

Answer: 0.027 m³/s

Expert Solution

Step 1

Given,

TSS removal efficiency, $η$ = 80%

Inflow, $Q_{i}$ = 0.5 m³/s

Influent concentration, $X_{i}$ = 100 mg/L

TSS concentration, $X_{e}$ = 1500 mg/L

Flow to remove sludge, $Q_{e}$ =?

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