2. A manufacturing plant is discharging wastewater into a stream at a constant rate of 2.0 m²/sec. The concentration of a contaminant in the wastewater is given as 50 ppm. The average stream flow upstream of the discharge point is 6.0 m³/sec, and an upstream contaminant concentration of 4 ppm. The average depth of the stream is given as 1.5 m and the average width is given as 25 m. The contaminant is removed by a first-order reaction with a rate coefficient of 0.35 /day. Assume the stream behaves as a plug-flow system. a. Draw a diagram and write the appropriate (starting) mass balance equation(s).} See pdf Not sure how to proceed b. Calculate the concentration of the contaminant in the stream at the discharge point and at 25 km downstream.

2. A manufacturing plant is discharging wastewater into a stream at a constant rate of 2.0 m²/sec. The concentration of a contaminant in the wastewater is given as 50 ppm. The average stream flow upstream of the discharge point is 6.0 m³/sec, and an upstream contaminant concentration of 4 ppm. The average depth of the stream is given as 1.5 m and the average width is given as 25 m. The contaminant is removed by a first-order reaction with a rate coefficient of 0.35 /day. Assume the stream behaves as a plug-flow system. a. Draw a diagram and write the appropriate (starting) mass balance equation(s).} See pdf Not sure how to proceed b. Calculate the concentration of the contaminant in the stream at the discharge point and at 25 km downstream.

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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Concept explainers

Storm Sewers and Detention

The storm drains system transports rainwater or stormwater and other runoff from roads, parking lots, and roof downpipes directly to nearby creeks, rivers, or the sea without any treatment.

Question

2. A manufacturing plant is discharging wastewater into a stream at a constant rate of 2.0 m/sec. The
concentration of a contaminant in the wastewater is given as 50 ppm. The average stream flow
upstream of the discharge point is 6.0 m³/sec, and an upstream contaminant concentration of 4 ppm.
The average depth of the stream is given as 1.5 m and the average width is given as 25 m. The
contaminant is removed by a first-order reaction with a rate coefficient of 0.35 /day. Assume the
stream behaves as a plug-flow system.
a. Draw a diagram and write the appropriate (starting) mass balance equation(s).}
See pdf
O Not sure how to proceed
b. Calculate the concentration of the contaminant in the stream at the discharge point and at 25
km downstream.
At the dischrage point:
mg/L
25 km downstream:
mg/L

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