Question

A wastewater treatment plant disposes of its effluent in a surface stream. Characteristics of the stream...

A wastewater treatment plant disposes of its effluent in a surface stream. Characteristics of the stream and effluent are given in the table below.

What will be the dissolved oxygen concentration in the stream after 2.0 days? (10 Points)

What will be the lowest dissolved oxygen concentration as a result of the waste discharge? (10 Points)

Parameter

Wastewater

Stream

Flow, m3/s

0.2

5.0

Dissolved Oxygen, mg/L

1.0

8.0

Temperature, o C

15.0

20.2

BOD5 at 20oC, mg/L

100

2.0

k1 at 20oC, d-1

0.2

-

K2 at 20oC, d-1

-

0.3
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