A small industrial plant discharges wastewater into a stream. The plant discharge has a flow rate of 0.2 m3/s and a BODu concentration of 40 mg/L. The stream receiving the discharge has a flow rate of 1.3 m3/s and a BODu of 6 mg/L. Downstream of the discharge point, the velocity in the stream is 0.15 m/s. Assuming no other sources of BOD enter the stream, what is the BODu remaining in the stream 10 km downstream of the plant discharge? Use k = 0.23 day-1.

Answered: A small industrial plant discharges…

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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A small industrial plant discharges wastewater into a stream. The plant discharge has a flow rate of 0.2 m³/s and a BOD_u concentration of 40 mg/L. The stream receiving the discharge has a flow rate of 1.3 m³/s and a BOD_u of 6 mg/L. Downstream of the discharge point, the velocity in the stream is 0.15 m/s. Assuming no other sources of BOD enter the stream, what is the BOD_u remaining in the stream 10 km downstream of the plant discharge? Use k = 0.23 day^-1.

Expert Solution

Biochemical Oxygen Demand(BOD)

It is the amount of oxygen required by micro organisms to decompose organic matter under aerobic condition in an specific range of temperature

formula generally used:

$B O D_{e x e r t e d} = B O D_{u l t i m a t e} (1 - e^{- k \times t i m e})$

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